Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download ES3 Metering Installation Requirements Part A
Document related concepts
Electrician wikipedia , lookup
History of electric power transmission wikipedia , lookup
Electrical substation wikipedia , lookup
Portable appliance testing wikipedia , lookup
Sound level meter wikipedia , lookup
Alternating current wikipedia , lookup
Three-phase electric power wikipedia , lookup
Voltage optimisation wikipedia , lookup
Mains electricity wikipedia , lookup
Peak programme meter wikipedia , lookup
Rectiverter wikipedia , lookup
Telecommunications engineering wikipedia , lookup
Smart meter wikipedia , lookup
Transcript
Network Standard NETWORK NW000-S0141 NW000-S0141 Document No Amendment No Approved By Approval Date Review Date : : : : : NW000-S0141 0 Manager NR & P 29/03/2017 29/03/2020 (Supersedes ES3 Part A) ES3 METERING INSTALLATION REQUIREMENTS PART A UNCONTROLLED IF PRINTED Page 1 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 ISSUE For issue to all Ausgrid and Accredited Service Providers’ staff involved with the installation of metering equipment and is for reference by field, technical and engineering staff. Ausgrid maintains a copy of this and other Network Standards together with updates and amendments on www.ausgrid.com.au. Where this standard is issued as a controlled document replacing an earlier edition, remove and destroy the superseded document. DISCLAIMER As Ausgrid’s standards are subject to ongoing review, the information contained in this document may be amended by Ausgrid at any time. It is possible that conflict may exist between standard documents. In this event, the most recent standard shall prevail. This document has been developed using information available from field and other sources and is suitable for most situations encountered in Ausgrid. Particular conditions, projects or localities may require special or different practices. It is the responsibility of the local manager, supervisor, assured quality contractor and the individuals involved to make sure that a safe system of work is employed and that statutory requirements are met. Ausgrid disclaims any and all liability to any person or persons for any procedure, process or any other thing done or not done, as a result of this Standard. All design work, and the associated supply of materials and equipment, must be undertaken in accordance with and consideration of relevant legislative and regulatory requirements, latest revision of Ausgrid’s Network Standards and specifications and Australian Standards. Designs submitted shall be declared as fit for purpose. Where the designer wishes to include a variation to a network standard or an alternative material or equipment to that currently approved the designer must obtain authorisation from the Network Standard owner before incorporating a variation to a Network Standard in a design. External designers including those authorised as Accredited Service Providers will seek approval through the approved process as outlined in NS181 Approval of Materials and Equipment and Network Standard Variations. Seeking approval will ensure Network Standards are appropriately updated and that a consistent interpretation of the legislative framework is employed. Notes: 1. Compliance with this Network Standard does not automatically satisfy the requirements of a Designer Safety Report. The designer must comply with the provisions of the Workplace Health and Safety Regulation 2011 (NSW - Part 6.2 Duties of designer of structure and person who commissions construction work) which requires the designer to provide a written safety report to the person who commissioned the design. This report must be provided to Ausgrid in all instances, including where the design was commissioned by or on behalf of a person who proposes to connect premises to Ausgrid’s network, and will form part of the Designer Safety Report which must also be presented to Ausgrid. Further information is provided in Network Standard (NS) 212 Integrated Support Requirements for Ausgrid Network Assets. 2. Where the procedural requirements of this document conflict with contestable project procedures, the contestable project procedures shall take precedent for the whole project or part thereof which is classified as contestable. Any external contact with Ausgrid for contestable works projects is to be made via the Ausgrid officer responsible for facilitating the contestable project. The Contestable Ausgrid officer will liaise with Ausgrid internal departments and specialists as necessary to fulfil the requirements of this standard. All other technical aspects of this document which are not procedural in nature shall apply to contestable works projects. INTERPRETATION In the event that any user of this Standard considers that any of its provisions is uncertain, ambiguous or otherwise in need of interpretation, the user should request Ausgrid to clarify the provision. Ausgrid’s interpretation shall then apply as though it was included in the Standard, and is final and binding. No correspondence will be entered into with any person disputing the meaning of the provision published in the Standard or the accuracy of Ausgrid’s interpretation. KEYPOINTS This standard has a summary of content labelled “KEYPOINTS FOR THIS STANDARD”. The inclusion or omission of items in this summary does not signify any specific importance or criticality to the items described. It is meant to simply provide the reader with a quick assessment of some of the major issues addressed by the standard. To fully appreciate the content and the requirements of the standard it must be read in its entirety. AMENDMENTS TO THIS STANDARD Where there are changes to this standard from the previously approved version, any previous shading is removed and the newly affected paragraphs are shaded with a grey background. Where the document changes exceed 25% of the document content, any grey background in the document is to be removed and the following words should be shown below the title block on the right hand side of the page in bold and italic, for example, Supersedes – document details (for example, “Supersedes Document Type (Category) Document No. Amendment No.”). NW000-S0141 UNCONTROLLED IF PRINTED Page 2 of 60 KEY POINTS OF THIS STANDARD Scope and Risks Addressed This standard is limited to scope identified below and provides controls for associated risks as listed below: CT metering HV metering Metering requirements for consumers Energising metering Connection policy Metering Requirements Use this section to identify/summarise major design requirements: Physical metering requirements Electrical metering configuration Commercial and residential tariffs Metering Installation Construction requirements may include references to safety and construction management processes: Contestable Metering Design and policy requirements Contestable type 1-4 metering installations Commercial installations Domestic installations Existing installations Where to for more information? Where to for more information? Where to for more information? Section 6, 8, 9 Section 6,8,9 Section 7, 10 Where to for more information? Tools and Forms Tools and Forms Tools and Forms Section 8, 9 NA NA Annexure A (DOCUMENT NO.) UNCONTROLLED IF PRINTED Page 3 of 60 S0141 ES3 METERING INSTALLATION REQUIREMENTS PART A Amendment No 0 Network Standard S0141 ES3 Metering Installation Requirements Part A Contents 1.0 PURPOSE ............................................................................................................................................. 7 2.0 SCOPE .................................................................................................................................................. 7 3.0 REFERENCES ...................................................................................................................................... 7 3.1 General....................................................................................................................................... 7 3.2 Ausgrid documents .................................................................................................................... 7 3.3 Other standards and documents ................................................................................................ 7 3.4 Acts and regulations ................................................................................................................... 7 4.0 DEFINITIONS ........................................................................................................................................ 8 5.0 PROVISION OF METERING EQUIPMENT ........................................................................................ 11 5.1 Notification requirements for new metered installations .......................................................... 12 6.0 METERING REQUIREMENTS FOR SMALL RETAIL CUSTOMERS ................................................ 13 6.1 Introduction .............................................................................................................................. 13 6.2 Application of ToU and flat rate metering policy ...................................................................... 14 6.2.1 New installations .......................................................................................................... 14 6.2.2 Existing installations ..................................................................................................... 14 6.3 Metering requirements ............................................................................................................. 16 6.3.1 Metering equipment...................................................................................................... 16 6.3.2 Standard metering configurations ................................................................................ 16 6.3.3 Non-standard metering configurations ......................................................................... 17 6.3.4 Protection of metering .................................................................................................. 17 6.3.5 Number of meters per installation ................................................................................ 17 6.3.6 Customers with controlled loads .................................................................................. 17 6.3.7 Customers that remove controlled load ....................................................................... 18 6.3.8 Transferring meters from a builders service to the permanent installation .................. 20 6.3.9 Relocating existing meters ........................................................................................... 20 6.3.10 Flexible switchboard and panel wiring ......................................................................... 21 6.3.11 Standard wiring configurations for meters ................................................................... 21 6.3.12 Details required on the notification of service work form (NOSW) ............................... 25 6.4 Application of tariffs .................................................................................................................. 26 6.4.1 Reading of flat rate metering equipment ...................................................................... 26 6.4.2 Reading of time of use metering equipment ................................................................ 26 6.5 Metering equipment spacing requirements .............................................................................. 28 6.5.1 Single metered installations ......................................................................................... 28 6.5.2 Multiple metering installations ...................................................................................... 28 6.5.3 Existing metering installations ...................................................................................... 28 6.6 Fixing of metering equipment ................................................................................................... 29 6.7 Metering requirements for embedded generation .................................................................... 29 6.7.1 Details required on the notification of service work form (NOSW) ............................... 30 6.7.2 Embedded generation metering requirements ............................................................. 30 6.7.3 Net metered embedded generation requirements ....................................................... 30 6.7.4 Registration of bi-directional energy flow in ToU meters ............................................. 31 NW000-S0141 UNCONTROLLED IF PRINTED Page 4 of 60 S0141 ES3 Metering Installation Requirements Part A 6.8 6.9 Amendment No 0 6.7.5 Gross metered embedded generation requirements ................................................... 31 6.7.6 Adding additional bi-directional metering ..................................................................... 36 Energising metering ................................................................................................................. 37 Metering With remote data acquisition capability .................................................................... 38 6.9.1 Remote communicating meters permitted to be removed ........................................... 38 7.0 METERING REQUIREMENTS TYPE 1 - 4 METERING INSTALLATIONS ........................................ 39 7.1 Notification requirements for new installations......................................................................... 40 7.2 Notification requirements for existing installations ................................................................... 41 7.3 Entry to Ausgrid substations .................................................................................................... 41 7.4 Commercial agreements .......................................................................................................... 42 7.5 Information on existing Ausgrid metering equipment ............................................................... 42 7.6 Metering data requirements ..................................................................................................... 42 7.7 Compliance with Ausgrid’s safety plans ................................................................................... 42 7.8 Controlled load tariff switching ................................................................................................. 42 7.9 Labelling and contact details .................................................................................................... 43 7.10 Location of type 1-4 metering installations............................................................................... 43 7.11 Checklist for type 1 to 4 metering installations ........................................................................ 43 8.0 LOW VOLTAGE CURRENT TRANSFORMER METERING REQUIREMENTS ................................. 45 8.1 Prior to commencement of switchboard installation ................................................................ 45 8.2 Low voltage CT’s ...................................................................................................................... 45 8.2.1 Low voltage CT’s supplied by Ausgrid. ........................................................................ 45 8.2.2 Low voltage CT’s not supplied by Ausgrid. .................................................................. 46 8.3 Low voltage CT primary conductor requirements .................................................................... 46 8.4 General requirements of CT installation and secondary conductors ....................................... 47 8.4.1 CT metering test block requirements ........................................................................... 47 8.5 Arranging metering for a low voltage CT installation ............................................................... 48 9.0 HIGH VOLTAGE METERING REQUIREMENTS ................................................................................ 48 9.1 Instrument transformer compliance ......................................................................................... 48 9.2 Provision for instrument transformer testing ............................................................................ 49 9.3 Voltage transformers ................................................................................................................ 49 9.3.1 Type 1 installations....................................................................................................... 49 9.3.2 Single phase VTs ......................................................................................................... 49 9.3.3 Three phase VT ............................................................................................................ 49 9.3.4 VT secondary terminal boxes ....................................................................................... 50 9.3.5 VT circuit protection ...................................................................................................... 50 9.4 High voltage current transformers ............................................................................................ 50 9.4.1 Type 1 Installations ...................................................................................................... 51 9.4.2 Type 2 Installations ...................................................................................................... 51 9.5 High voltage combined transformers ....................................................................................... 51 9.6 High voltage metering installation documentation ................................................................... 51 9.7 Marshalling box ........................................................................................................................ 51 9.7.1 VT/s .............................................................................................................................. 51 9.7.2 CTs ............................................................................................................................... 51 9.8 Secondary cables ..................................................................................................................... 52 9.9 Metering panels and enclosures .............................................................................................. 53 9.10 Earthing .................................................................................................................................... 54 9.11 Fuse ratings ............................................................................................................................. 54 9.12 Labelling ................................................................................................................................... 55 9.13 Auxiliary supply ........................................................................................................................ 56 9.14 Information required prior to electrification............................................................................... 56 NW000-S0141 UNCONTROLLED IF PRINTED Page 5 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 10.0 RETURNING OF METERING EQUIPMENT ....................................................................................... 56 10.1 ASPs ........................................................................................................................................ 56 10.2 MPBs ........................................................................................................................................ 57 11.0 RECORDKEEPING ............................................................................................................................. 57 12.0 AUTHORITIES AND RESPONSIBILITIES .......................................................................................... 57 13.0 DOCUMENT CONTROL...................................................................................................................... 57 ANNEXURE A – NOMW FORM METER TYPES 1 - 4 ................................................................................... 58 ANNEXURE B – OBSOLETE ZELLWEGER ZE22/3 LOAD CONTROL RELAYS ........................................ 59 B1 General..................................................................................................................................... 59 B2 Local Ausgrid representatives .................................................................................................. 60 NW000-S0141 UNCONTROLLED IF PRINTED Page 6 of 60 S0141 ES3 Metering Installation Requirements Part A 1.0 Amendment No 0 PURPOSE This publication provides general information to assist with connection of metering equipment to Ausgrid’s network. 2.0 SCOPE This document outlines Ausgrid’s revenue metering installation requirements for all metered installations within the Ausgrid distribution area. The metering installation must also comply with the following requirements where applicable: The National Electricity Rules AEMO Metrology Procedure AEMO Service Level Procedures for MPB’s and other associated AEMO procedures Ausgrid’s Electrical Supply (ES) series of documents Ausgrid’s Connection Policy, Connection Charges The customers connection contract with Ausgrid (under NECF) Deemed Standard Connection Contract Service and Installation Rules of NSW Ausgrid’s Network Standard (NS) series of documents AS/NZS3000, The Wiring Rules Code for safe installation of direct-connected whole current electricity metering in NSW 3.0 REFERENCES 3.1 General All work covered in this document shall conform to all relevant Legislation, Standards, Codes of Practice and Network Standards. Current Network Standards are available on Ausgrid’s Internet site at www.ausgrid.com.au. 3.2 Ausgrid documents 3.3 Company Form (Governance) - Network Technical Document Endorsement and Approval Company Procedure (Governance) - Network Technical Document Endorsement and Approval Company Procedure (Network) – Network Standards Compliance Company Procedure (Network) - Production / Review of Engineering Technical Documents within BMS Customer Installation Safety Plan Division Workplace Instruction (Network) – Production /review of Network Standards Electrical Safety Rules Electricity Network Safety Management System Manual NS181 Approval of Materials and Equipment and Network Standard Variations NS212 Integrated Support Requirements for Ausgrid Network Assets NS261 Requirement for Design Compliance Framework for Network Standards Other standards and documents 3.4 ENA Doc 001-2008 National Electricity Network Safety Code Acts and regulations NW000-S0141 Electricity Supply (General) Regulation 2014 (NSW) Electricity Supply (Safety and Network Management) Regulation 2014 Work Health and Safety Act 2011 and Regulation 2011 UNCONTROLLED IF PRINTED Page 7 of 60 S0141 ES3 Metering Installation Requirements Part A 4.0 Amendment No 0 DEFINITIONS Accredited Service Provider (ASP) An individual or entity accredited by the NSW Department of Industry, Division of Resources and Energy, in accordance with the Electricity Supply (Safety and Network Management) Regulation 2014 (NSW). AEMO Australian Energy Market Operator. BASIC Meter A meter used in a Flat Rate Metering Installation. Bi Directional Metering ToU electronic metering that is capable of measuring both energy consumption (Import) and energy generated back into the electricity network (export) Business Management System (BMS) An Ausgrid internal integrated policy and procedure framework that contains the approved version of documents. CCEW Certificate of Compliance – Electrical Work CEC Clean Energy Council. Formerly the Business Council of Sustainable Energy. Connection Application Connection Application. See Ausgrid’s website for details http://www.ausgrid.com.au/Common/Our-network/Connecting-to-thenetwork/How-do-I-connect-to-the-network/Connection-application-forms-andguides.ASPx Connection Point Means the junction between the customers installation and the electricity network. Known as point of common coupling as per the Service and Installation rules of NSW. See the Service and Installation Rules of NSW for examples. CT Current Transformer Customer Installation For the purpose of this document, a Customer Installation is the whole or portion of a customer’s private electrical installation that requires separate metering and an individual National Metering Identifier (NMI) for the purposes of the National Electricity Market (NEM). For example a block of 20 home units or flats will have at least 20 Customer Installations and possibly one or more common Customer Installations such as house lights, lifts and essential services. Data Stream Data Stream means a stream of energy data or metering data associated with a metering point, as represented by a NMI. For example, a NMI will have multiple Data Streams where one or more meters or one or more channels or registers comprise a single meter. Each Data Stream is identified by a suffix, which is associated with the NMI to which it belongs. Document control As a minimum requirement, controlled documents will be identified by a unique number, be signed or noted as approved by the appropriate approving officer, have the current amendment number and approval date clearly displayed. Note: Ausgrid employees who work with printed copies of document must check the Business Management System (BMS) regularly to monitor version control. Documents are considered “uncontrolled if printed”, as indicated in the footer. Export Energy Electricity that is generated by the customer and delivered back to the Ausgrid Network (i.e. electricity delivered to the NEM electricity pool). Flat Rate Metering A Type 6, accumulation or Basic metering installation. NW000-S0141 UNCONTROLLED IF PRINTED Page 8 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Gross Metering A metering system that measures the electricity generated by the Complying Generator system. ILAC The International Laboratory Accreditation Corporation. Import Energy Electricity that is drawn from the local distribution network and consumed or used within the customer’s installation (i.e. electricity received from the NEM electricity pool). Load Control Unit (LCU) Load Control Unit means ripple frequency relay or a time switch that controls specific customer load. Refer to ES7 – Network Price Guide for further information on controlled load tariffs. Meter Maintenance Means the replacement or repair of any metering equipment as deemed necessary by Ausgrid. Meter Maintenance on electricity meters may only be conducted by Ausgrid. MRIM Manually Read Interval Meter - a meter used in a ToU Metering Installation. MDP Meter Data Provider - A service provider accredited by AEMO and responsible for the collection, validation, storage and distribution of electricity meter data. MPA Metering Provider A – A service provider accredited by the NSW Trade and Investment and Authorised by Ausgrid (i.e. Level 2, Category 4 ASP), who is responsible for the installation of NER compliant whole current connected metering for sites < 160MWh energy consumption per annum for a NEM Responsible Person (e.g. Ausgrid Local Network Service Provider). MPB Metering Provider B - A service provider accredited by AEMO and responsible for electricity meter supply, installation, maintenance, testing and repair of a metering installation. NEM National Electricity Market. NER National Electricity Rules. Net Metering A metering system that measures the excess energy generated and exported into the distribution network. Non-compliant For the purposes of this document this means an embedded generation system that does not meet the requirements of the NSW Solar Bonus Scheme NMI National Metering Identifier. NOMW Notification of Metering Work (Ausgrid) for Type 1-4 contestable metering and is completed by AEMO Accredited MPB’s. See Annexure A. NSW Trade and Investment The Department of Trade and Investment, Regional Infrastructure and Services (NSW) who manage the accreditation scheme for contestable works within NSW. NOSW Notification of Service Work (Ausgrid). See ES4 for further details. Network Standard A document, including Network Planning Standards, that describes Ausgrid’s minimum requirements for planning, design, construction, maintenance, technical specification, environmental, property and metering activities on the distribution and transmission network. These documents are stored in the Network Category of the BMS repository. Recordkeeping Making and maintaining complete, accurate and reliable evidence of business transactions in the form of recorded information (Source: AS Records classification handbook – HB5031 – 2011). Responsible The person who has responsibility for a metering installation for a particular NW000-S0141 UNCONTROLLED IF PRINTED Page 9 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Person Connection Point, being either the Local Network Service Provider (e.g. Ausgrid) or the Market Participant as described in Chapter 7 of the NERs. Review date The review date displayed in the header of the document is the future date for review of a document which is one year for documents requiring annual review, two years for fraud control documents or the default period of three years from the date of approval. A review may be mandated at any time where a need is identified due to changes in legislation, organisational changes, restructures, occurrence of an incident or changes in technology or work practice Rule Compliant Rule Compliant is metering that complies with the requirements of the National Electricity Rules (Chapter 7) and associated procedures. Small Retail Customer A customer with an energy consumption of less than 160MWh’s per annum. Structure (Str) Is the electronic meter’s program configuration identifier which identifies the measurement parameters of the meter. Time of Use (ToU) metering A Type 5, interval or MRIM metering installation. NW000-S0141 UNCONTROLLED IF PRINTED Page 10 of 60 S0141 ES3 METERING INSTALLATION REQUIREMENTS PART A 5.0 Amendment No 0 PROVISION OF METERING EQUIPMENT The customer is required to fund the cost of connection to the network, refer to Ausgrid’s Connection Policy – Connection Charges. The Customer’s ASP is also required to pay a capital contribution for the electricity meter used for any new or upgraded Type 5 or Type 6 installation Residential Residential Type Market Category (h) Customer Arrangement (j) Metering Equipment 1 Commercial Residential Network Tariff Retail Category Connection Customer Phases Table 1 Provision of metering equipment WC Default Flat Rate WC Embedded Generation & Opt-In Time-of-Use Type 6 Supply Installation Ownership Maintenance Ausgrid Ausgrid Customer Customer Customer Customer / MPB (g) Customer Customer / MPB (g) B1/B3 Meter–Ausgrid (a) LCU – Ausgrid (b) 3 ASP 1 Commercial Residential 3 Commercial 3 WC 3 (LV) CT E1/E2/E3 Meter–Ausgrid (a) Small (i) LCU – Ausgrid (b) Type 5 Default Time of Use E4 Meter–Ausgrid (c) Commercial Residential LCU – Ausgrid (b) Ausgrid CT – Customer(d)(e) Customer 1 3 Commercial Default Time of Use WC As per ES7 Type 4 1 Meter – MPB LCU – Ausgrid (if requested) (b) MPB (g) Small (i) 3 3 Or (LV) CT Large (j) Commercial As per ES7 3 Type 1-4 Meter – MPB MPB (g) CT – Customer (d)(e) Customer Meter – MPB MPB (g) CT – Customer HV VT – Customer NW000-S0141 UNCONTROLLED IF PRINTED Page 11 of 60 Customer (e) S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Provision of metering equipment table notes (a) An up-front fee applies for Ausgrid supplied meters. This fee is documented in Ausgrid’s Connection Policy – Connection Charges. (b) External LCUs are provided at no cost to ASPs or MPBs (if requested). (c) A fee applies to the installation of E4 meters. This fee is documented in Ausgrid’s Connection Policy – Connection Charges. (d) Ausgrid have available for sale LV CT’s that comply with the requirements of this document (e) Where metering CTs are purchased from an external supplier (not Ausgrid) and installed within Ausgrid’s distribution area, the customer must ensure that the CT’s are Rule Compliant. Ausgrid will require test results certifying that installed CTs comply with the National Electricity Rules, see Section 8 for further details (f) The customer’s metering installation, including any associated current and voltage transformers, must be located within the customer’s installation and external to Ausgrid’s substation or equipment. Refer also to NS 195 HV Customer Connections (HVCs). Where the customer’s metering equipment was previously installed in Ausgrid’s substation (e.g. a HV metering unit), or embedded within Ausgrid’s switchgear (e.g. CTs and VTs), it must be relocated into the customer’s installation and external to Ausgrid’s equipment, at the customer's cost, where this metering equipment or switchgear requires replacement or alterations for any reason (g) Metering installation, ownership and maintenance arrangements are commercially negotiated between retailer and customer (h) Retail customer category is as per the National Energy Retail Law (NSW) Section 1, subsection 5 (i) A small customer is a customer (a) who is a residential customer; or (b) who is a business customer who consumes energy at business premises below the upper consumption threshold of 100MWh per annum. (j) A large customer is a business customer who consumes energy at business premises at or above the upper consumption threshold of 100MWh per annum. (k) Network tariff will be assigned as per ES7 Network Price Guide. 5.1 Notification requirements for new metered installations For all new Flat Rate or ToU metering installations, the metering installer must ensure a Retail contract is in place and then obtain an Installation Job Number from the local Ausgrid Field Operations office prior to installing metering and the site being energised. A completed 'Connection Application' must be submitted to Ausgrid to obtain the Installation job number. See our website http://www.ausgrid.com.au/Common/Our-network/Connecting-to-the-network.aspx for information on submitting connection applications. For all new Type 1-4 metering installations, the MPB is responsible for coordinating with the customer’s licensed electrical contractor and ASP (e.g. service line installer) to ensure that the new metering is commissioned at the time the customer takes supply and complies with all the requirements defined in Ausgrid document ES 1 – Premises Connection Requirements. Customer Installations must not be energised without a NER compliant Metering Installation installed. The procedures detailed in Ausgrid publication ES 4 – Service Provider Authorisation must be followed for energising whole current installations. Mandatory inspections are required for sites greater than 100 Amps, see ES1 – Premises Connection Requirements for further details NW000-S0141 UNCONTROLLED IF PRINTED Page 12 of 60 S0141 ES3 Metering Installation Requirements Part A 6.0 METERING REQUIREMENTS FOR SMALL RETAIL CUSTOMERS 6.1 Introduction Amendment No 0 Ausgrid is responsible for the provision and maintenance of Flat Rate or ToU metering equipment for use on small retail Customer Installations located within the Ausgrid distribution network as required by the National Electricity Rules. The installation of these meters on new or upgraded installations must be installed by an Accredited and Authorised ASP (see Ausgrid policy document ES4 – Service Provider Authorisation for further details) and comply with the Service and Installation Rules of NSW and this document. Ausgrid provides Flat Rate or ToU metering instruments for all new customer sites and for existing installations where Flat Rate or ToU metering is being altered, such as an increase in the number of phases or the separation of supply for different customer accounts. The supply of these metering instruments attracts a regulated up-front charge The meters, provided by Ausgrid for Flat Rate or ToU metered customer sites, comply with the relevant National Electricity Rules requirements for Flat Rate or ToU Metering Installations. The meters are whole current 100 Amp, bottom-connected instruments. Installation or alterations of current transformer metering installations cannot be conducted by an ASP, only Ausgrid’s metering provider may conduct this work. The following abbreviations will be used to describe the range of meters provided by Ausgrid: Table 2 ‘E’ designation meter abbreviations Abbreviation Description E1 / E1c single phase, single element, Whole Current 100A ToU interval meter E2 / E2c single phase, dual element, Whole Current 100A ToU interval meter, with preprogrammed - controlled load facility (ripple frequency relay or time switch) as required. E3 / E3c 3-phase, single element, Whole Current 100A ToU interval meter. (Note: This 3-phase meter must only be used to meter a single tariff). Note: The ‘c’ designation references the existence of an in-built disconnect contactor. However this contactor is not utilised. For the purpose of Type 5 ToU metering installations, these meters are functionally equivalent Table 3 ‘B’ designation meter abbreviations Abbreviation Description B1 single phase, single element, Whole Current 100A Flat Rate accumulation meter. B3 3-phase, single element, Whole Current 100A Flat Rate accumulation meter. (Note: This 3-phase meter must only be used to meter a single tariff). L Load Control Unit a ripple receiver or time switch for up to 25A switching of resistive load. See clause 2.3.6 for more information on the requirements for controlled load. Refer ES3, Part B Technical Specifications for Metering Equipment for details. NW000-S0141 UNCONTROLLED IF PRINTED Page 13 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Note: Single phase dual element Flat Rate accumulation meter (i.e. B2), is not available. Where load control is required at a Flat Rate metering installation an approved Ausgrid LCU must be utilised. Table 4 or 5 shows the standard whole current metering configurations for new and upgraded sites (e.g. increase in the number of supply phases or the addition of an embedded generator). 6.2 Application of ToU and flat rate metering policy Ausgrid provides both ToU and Flat Rate Whole Current metering equipment for ASPs to install at new and upgraded installations connected or proposed to be connected to Ausgrid distribution Network. 6.2.1 New installations As of 1 July 2014, the standard metering to be used for metering new connections to the Ausgrid distribution network will be a Flat Rate metering installation unless the requirements of this clause require a ToU metering installation to be installed. The following exceptions apply where ToU metering MUST be installed rather than Flat Rate: Any installation where embedded generation systems are installed (e.g. solar); A three phase <100A commercial (including residential house lights) or industrial metering connection (it is assumed these connections would have a network tariff EA302 applied – see ES7 Network Price Guide), excluding Temporary Builders Supplies, which will be removed the when permanent supply and metering is installed; Customers who wish to be billed via a time of use or demand capacity tariff; Low voltage current Transformer metering installations which are not Type 1-4 (Ausgrid will install the meter in this case as this metering work is non contestable); It is critical that the ASP confirms with their customer if ToU metering is required. Ausgrid must be notified on the Connection Application stage for new and upgraded metering connections if ToU metering to support a time based tariff is required. If an ASP installs a Flat Rate metering installation which is not in compliance with this clause a defect will be raised against the ASP and the incorrect metering equipment must be replaced by the ASP with the appropriate ToU metering installation. 6.2.2 Existing installations For existing connections which are proposed to be altered or upgraded (e.g. alteration in the number of phases) a like for like policy applies (i.e. where a ToU metering installation is being upgraded the new metering installed must be ToU). If a Flat Rate metering installation is being upgraded, a Flat Rate metering installation must be installed unless the exceptions of clause 6.2.1 require a ToU meter to be installed. If an ASP is required to install additional metering at an existing single or three phase Flat Rate metering installation (e.g. the addition of single phase controlled load metering) and does not meet the exceptions of clause 6.2.1 where a ToU meter must be installed, the ASP may leave the existing Flat Rate metering connected if it has a nameplate rating of 100A. The installed metering configuration must still comply with the requirements of table 4 or 5. NW000-S0141 UNCONTROLLED IF PRINTED Page 14 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Table 4 Consumption only metering configuration Table 5 Net embedded metering configuration NW000-S0141 UNCONTROLLED IF PRINTED Page 15 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Table 6 Metering configuration symbols 6.3 Metering requirements When installing new or altered metering it is essential that the minimum number of meters are used and all metering installations must contain the minimum number of Data Streams. The metering point must be located as close as practicable to the Connection Point as defined in the Service and Installation Rules of NSW. Where Metering Installations are changed or relocated, the metering enclosure must be accessible to Ausgrid staff at all times in accordance with the requirements set out in the Service and Installation Rules of NSW. ASPs seeking Ausgrid supplied meters are required to forward a completed Connection Application form (which is available at Ausgrid’s website via http://www.ausgrid.com.au/Common/Ournetwork/Connecting-to-the-network/How-do-I-connect-to-the-network/Connection-applicationforms-and-guides.ASPx ) Unless prior approval has been granted by Ausgrid to permanently disconnect a premises connection from the Ausgrid Network, or it is an Ausgrid approved unmetered supply, all premises must have revenue metering as per this document and the NER and installed to capture energy usage and/or generation prior to being energised. If metering equipment is removed, it must be returned as per clause 10 of this document 6.3.1 Metering equipment Ausgrid’s procurement policies allow for multiple metering manufacturers to supply ToU and Flat Rate metering equipment for use on Ausgrid’s Network. When installing metering the ASP must ensure they have identified or specified the type of metering equipment that is to be installed as per clause 6.2, prior to constructing any metering panels or switchboards. See ES3 Part B, Technical Specifications for Metering Equipment for further technical details of metering equipment utilised in the Ausgrid Network area. 6.3.2 Standard metering configurations The standard metering configurations as set out in Table 4 or 5 are the preferred methods of metering all new or upgraded installations. All new metering installations where Ausgrid Flat Rate or Time of Use metering is installed shall comply with these requirements. All upgraded metering installations should comply with these requirements unless the ASP seeks alternate configurations as per clause 6.3.3 below. NW000-S0141 UNCONTROLLED IF PRINTED Page 16 of 60 S0141 ES3 Metering Installation Requirements Part A 6.3.3 Amendment No 0 Non-standard metering configurations Any existing installations that require the installation of non-standard metering configurations must be approved by the local Field Operations office prior to carrying out this work. Ausgrid’s local Field Operations office should be contacted for metering advice if any other alternative metering configurations need to be considered prior to carrying out any metering work. For Meter Maintenance purposes, non-standard or other alternate configurations or metering types may be used where site specific issues (e.g. insufficient space) will not allow for a metering configuration identified in Table 4 or 5, to be installed. Note: Meter Maintenance may only be conducted by Ausgrid’s metering provider. Level 2 ASPs or electrical contractors must not conduct any Meter Maintenance. 6.3.4 Protection of metering All new and upgraded whole current metering installations must be protected by an 80A HRC fuse on each phase. The HRC fuse must be located at the metering point. For exceptions to the location requirement, contact your local Field Operations office for approval. 6.3.5 Number of meters per installation The minimum number of meters will be supplied to ASPs to meter the connected or proposed tariffs of small retail customer sites in accordance with the requirements of this document and Ausgrid publication ES7 – Network Price Guide. The arrangements for issuing meters to ASPs are detailed in Ausgrid publication ES 4 – Service Provider Authorisation. Additional meters, in excess of the minimum required for the installation (e.g. for future 3-phase loads), will only be provided if the future load requiring the additional meters, is clearly indicated on the Connection Application form stating what three phase equipment is to be installed. If E3 or B3 meters are installed, all operational line and load phases must be connected and energised to the meter at time of energisation. 6.3.6 Customers with controlled loads The E2/E2c/LCU can only be issued for, and installed at a Customers Installation entitled to receive a controlled load tariff (refer to ES7– Network Price Guide). The method of controlling loads at an installation will depend on the individual metering arrangements required for that installation and the type of load to be controlled. The E2/E2c/LCU will be supplied upon application by the ASP who has current Ausgrid Level 2 Category 4 Metering Authorisation for a Type 5 or Type 6 metering installation. ASP’s should consult with Ausgrid’s local Field Operations office to clarify specific metering arrangements, the availability of certain electronic instrument types and to ensure the correct programming of the E2/E2c/LCU. As the E2/E2c/LCU must be pre-programmed in advance for particular site locations, the local Field Operations office will require the load control tariff details (OP1 or OP2) as well as any details of the ripple control switching frequency (e.g. 492, 750 or 1050 Hz) and channel (e.g. 103-15) or whether time switch control is required. These details are to be provided by the ASP on the ‘Meter Requisition' form (available from the local Field Operations office) when requesting a controlled load meter or LCU. NW000-S0141 UNCONTROLLED IF PRINTED Page 17 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Ausgrid’s controlled load equipment (meters, LCUs etc) is rated for a maximum of 25 Amps resistive load at single phase. For any multi-phase controlled load connections, loads of greater than 25 Amps or reactive loads, the customer will be required to install a sealable contactor at their cost. (See the Service and Installation Rules of NSW for additional information). Where controlled load metering is installed, the ASP must indicate on the NOSW which meter is connected to the controlled load circuit and what relay channel and frequency or time switch setting is programmed into the meter or LCU. Note: The frequency or time settings must be obtained prior to connecting new metering and load control equipment. One way to do this is to check the existing or neighbouring installations (with their permission). 6.3.6.1 Load control where Type 4 metering is installed Where controlled load functionality is required where Type 4 metering is installed, it is the MPBs responsibility to arrange for suitable load control functionality. If the load control is incorporated within the MPBs meter, the functionality must comply with appendix B of ES7 - Network Pricing Guide, unless an exemption is agreed between the MPB and Ausgrid. If an external non Ausgrid LCU is installed, an LCU with the appropriate settings as per the customer’s tariff requirements is required, and the LCU must meet the requirements of appendix B of ES7 – Network Pricing Guide. Ausgrid can provide an appropriate LCU upon request at no cost. However for MPBs to be issued Ausgrid LCUs, the MBP must meet the meter issue requirements outlined in ES4 – Service Provider Authorisation and the equipment must be installed by an appropriately authorised ASP. If the load control is switched by a Type 5 E2 meter, this must not be left onsite, but must be returned to Ausgrid as outlined in Section 10, so that a final read may be conducted. Note: Only LCUs that have been approved for use by Ausgrid may be used for controlled load tariffs. 6.3.7 Customers that remove controlled load Customers that no longer require controlled load (e.g. removal of a hot water system) must arrange for the removal of the redundant controlled load metering and LCU. They must also ensure the minimum number of meters remain at the installation. This may involve installing replacement metering. For example: (a) Existing three-phase installations that contain ToU metering equipment where the load control equipment is no longer required, must replace the existing metering and load control equipment with an E3 meter (e.g. an existing installation may have 2, E1’s and an E2. If they no longer require the controlled load equipment, all the existing metering is to be removed and replaced with an E3 meter). (b) In existing single phase installations which contain ToU metering equipment and where the load control is no longer required, either: NW000-S0141 (i) E2 meter must be replaced with an E1 meter, or (ii) Controlled load E1/B1 and LCU must be removed and the E1/B1 (domestic load) remains connected. UNCONTROLLED IF PRINTED Page 18 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 6.3.7.1 E2 meter for controlled load use When an E2/E2c meter is provided as the control mechanism for the controlled load circuits of a customer’s installation, the following precautions must be taken. Both elements of an E2/E2c meter must be utilised (i.e. primary and controlled load elements). Incorrect installation of these meters will result in a major defect being issued against the ASP, which will require immediate rectification. An example of an E2 wiring diagram is provided in figure 3. A special exemption to this requirement is the use of the E2c programmed with Structure 66 or 67 where the first element has been disabled and the meter has been configured to operate as a single element meter with load control. Element 1 has been disabled and alarmed to monitor for inadvertent connection An example of an E2c wiring diagram in single element mode is provided in figure 3. Controlled load circuits must not be connected through the main principal tariff element of the E2 meter. The un-switched terminal of the E2 meter can only be used for the following purposes: Existing dual element hot water systems utilising the un-switched terminal for the top element and the bottom element is supplied from the switched terminal: or For inductive loads, which must be connected via a customer supplied contactor as per the per the Service and Installation Rules of NSW; or For loads greater than 25 Amps or multi-phase loads which must be connected via a customer supplied contactor as per the Service and Installation Rules of NSW With the exception of a Structure 26 gross meter, the uncontrolled terminal on an E2 meter can only be utilised where a controlled load tariff is applicable. Note, both controlled and uncontrolled terminal are connected to the same metering element. The total combined current limit of an E2 meter must not exceed 100 amps. If the intended load is greater than 100 amps, the local Field Operations Office must be consulted for approval of alternative metering arrangements. Ausgrid may utilise the E2 meter to replace faulty relays, time switches and associated meters on existing Customer Installations. As the replacement of faulty Ausgrid supplied metering equipment is a monopoly service, ASPs are not permitted to carry out Metering Maintenance 6.3.7.2 Load control unit (LCU) A LCU will be provided as either a ripple operated relay or a time switch. LCU’s must be wired according to the instructions on the relay or time switch and the standard wiring diagram in figure 7. Only one LCU is permitted per controlled load tariff for each separately metered Customer Installation. Controlled load circuits that have multi-phase loads, inductive loads or loads greater than 25 Amps must be connected via a customer supplied contactor as per the Service and Installation Rules of NSW. Where existing LCUs are installed and the metering is required to be upgraded to meet the requirements outlined in this document, all existing LCUs must be replaced with new LCUs unless they are current LCUs as outlined in part 8 of ES3 Part B. NW000-S0141 UNCONTROLLED IF PRINTED Page 19 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 6.3.7.3 Mix of ToU and flat rate meters New or upgraded metering installations must NOT have a mix of ToU and Flat Rate (including electro-mechanical) meters. Upgrading of existing installations with additional metering equipment is permitted, so long as the requirements of Table 4 or 5 are met. Example: An existing Flat Rate installation with 1-phase principal tariff only, requires the installation of metering for a controlled load tariff, if the existing principle tariff meter is rated at 100A, the ASP should leave this meter onsite and only add a B1 and LCU. Prior to the installation of any new metering equipment where existing electronic meters are installed, the ASP should contact Ausgrid’s Field Operations local office to determine if these existing meters are ToU compatible. If they are ToU compatible they must only be replaced with an appropriate ToU metering configuration as per table 4 or 5. 6.3.8 Transferring meters from a builders service to the permanent installation Existing whole current 100A rated metering instruments installed for a single domestic builders service may be transferred to the permanent metering location for the same site. The builder’s service and the permanent metering location must be on the same land title and same type of installation. Note: This provision does not apply to builder’s services supplying a commercial, industrial or multi-domestic development. This is provided that the meter(s) are not overloaded or obsolete and the procedures outlined in ES 1 – Premises Connection Requirements and ES 4 - Service Provider Authorisation are adhered to. This includes the forwarding of separate NOSW forms for the removal and subsequent installation of the metering equipment. Note: The two installations are considered as separate in terms of their Connection Application and Ausgrid job number. 6.3.9 Relocating existing meters Existing whole current meters (or 'meter panels' with metering instruments in situ) must not be relocated to a new location (either on the same or a different meter panel) with the following exceptions: NW000-S0141 transferred in accordance with clause 6.3.8 of this document; or existing Flat Rate (including electromechanical) or ToU bottom connected whole current meters rated at 100 Amps (as indicated on the meter nameplate) may be relocated provided the new location is within the same Customer Installation. UNCONTROLLED IF PRINTED Page 20 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 6.3.10 Flexible switchboard and panel wiring Flexible switchboard and panel wiring such as “Triangle’s PVC Flexible V90 HT Panel Wires and Switchboard Cable” may be used to connect service and metering equipment, provided it is installed in accordance with the manufacturer’s specifications. In particular, the exposed bare stranded conductors must be terminated into an approved (by the flexible cable manufacturer) encapsulation device, such as a Bootlace Pin (BLP) that must be crimped with an approved (by the encapsulation device manufacturer) crimping tool, before the cable is connected to service and metering equipment. The (thin-walled) metallic portion of the encapsulation device (BLP) must be of adequate length to ensure effective connection under ALL termination screws of the service and metering equipment. 6.3.11 Standard wiring configurations for meters Below are the standard generic wiring configurations for E1, B1, E2, E3 and B3 meters. These can be used as a general guide but the specific wiring configurations can be found in ES3, Part B, Technical Specifications for Metering Equipment or the inside of the terminal scoop cover of each electronic meter. Specific metering details, including reading register displays, mounting dimensions, drilling templates and commissioning checks, can be found in ES3, Part B, Technical Specifications for Metering Equipment. Note: All metering devices contain a wiring diagram on the inside of the terminal scoop cover, and they must be wired to this arrangement. Note: In the following drawings, the following acronyms are used. OP Sw is the switched terminal of the off second element of the electronic meter. OP Cont is the continuous terminal of the second element of the electronic meter. Figure 1 E1/E1c single phase single element electronic meter NW000-S0141 UNCONTROLLED IF PRINTED Page 21 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Figure 2 B1 Single phase element meter Figure 3 E2/E2c single phase dual element electronic meter with controlled load NW000-S0141 UNCONTROLLED IF PRINTED Page 22 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Figure 4 B3 three phase single element meter Figure 5 E3/E3c three phase single element electronic meter NW000-S0141 UNCONTROLLED IF PRINTED Page 23 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Figure 6 E3/E3c two phase single element electronic meter Figure 7 Load control device wiring diagram NW000-S0141 UNCONTROLLED IF PRINTED Page 24 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Figure 8 E3/E3c three Phase with Single Phase Load Control using E2c in Single Element Configuration 6.3.12 Details required on the notification of service work form (NOSW) The correct Structure as detailed in figure 1 to figure 8, Table 4, 5 and identified on the electronic meter MUST be indicated in the tariff box on the NOSW form that is submitted to Ausgrid for EACH electronic meter installed on the Customer’s Installation. Note: Redundant acronyms such as “DOM” and “111” will not be accepted. NW000-S0141 UNCONTROLLED IF PRINTED Page 25 of 60 S0141 ES3 Metering Installation Requirements Part A 6.4 Amendment No 0 Application of tariffs An appropriate Network tariff will be applied to all installed metering in accordance with the requirements documented in Ausgrid publication ES7 – Network Price Guide and the Ausgrid Network Price List. The customer’s energy Retailer will advise the customer of the current applicable retail tariff arrangements. 6.4.1 Reading of flat rate metering equipment Ausgrid’s Flat Rate metering equipment display the total energy in kWh consumed by the installation, accumulated from the date the meter is installed 6.4.2 Reading of time of use metering equipment Ausgrid programs all ToU metering equipment with a standard display configuration that may automatically or manually cycle (by pressing the display button on the meter) through a pre-set formatted display. Each of these displays has a specific function (e.g. date/time, kWh’s) and a register identifier. If a customer wishes to read the display of their electronic meter, they should look at the display readings on the meter and match them to table 7 (below) using the register (ID) identifiers as reference. Note: The meter time is not adjusted for daylight saving but is corrected in preparing meter data for other purposes such as billing. In general a subset of the following information in Table 7 is displayed on the registers indicated, based on the Type of meter and structure. NW000-S0141 UNCONTROLLED IF PRINTED Page 26 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Table 7 Description of register displays for electronic metering Registers ID Structures Function 19 60 20 62 63 21 61 23 64 65 66 67 25 26 27 29 Description Example Display Test Default display. Represents the start of the scroll All LCD symbols Date Current date programmed in meter 29:04:10 Current time programmed in meter. (Time is not adjusted for daylight saving) 12:34:23 Total energy consumed by the installation, accumulated from the date the meter is installed 3245.7 Total energy consumed by the controlled load (off peak) portion of the installation, accumulated from the date the meter is installed 12568.3 Total energy produced by the Complying Generator, accumulated from the date the meter is installed. 1025.6 Total energy consumed by the Complying Generator, accumulated from the date the meter is installed. 12548.5 The excess energy not consumed by the Customer Installation that is generated by the embedded generation installation and delivered back to the local Distribution Network, accumulated from the date the meter is installed. 125.2 88 1 Time 2 kWh Import 3 kWh Controlled 7 Gross kWh Export 73 Gross kWh Import 83 Net kWh Export 93 NW000-S0141 UNCONTROLLED IF PRINTED Page 27 of 60 S0141 ES3 Metering Installation Requirements Part A 6.5 Amendment No 0 Metering equipment spacing requirements For ALL new and existing Customer Installations a clearance of a minimum of 10mm must be maintained around all sides of installed metering equipment. 6.5.1 Single metered installations For all new sites containing a single Customer Installation the minimum space to be provided for metering for each separately metered Customer Installation is: (a) 380mm high x 380mm wide; or (b) 300mm high x 480mm wide. The location of this area must be from the top or bottom corner of the panel on the opposite side to the panel hinge. This space is to be marked and labelled “Metering Equipment Only”. No customer equipment may encroach on this area, with the exception of Service/Meter protection fuses and/or the Service neutral link. Any subsequent alterations or additions to the metering arrangements must comply with these space requirements. 6.5.2 Multiple metering installations 6.5.2.1 Single phase multiple domestic installations For all new single phase multiple domestic Customer Installations the minimum space to be provided for metering for each separately metered Customer Installation is: 270mm high x 170mm wide per unit. These spaces are to be marked on the switchboard and labelled “Metering Equipment Only”. No other equipment may encroach on this area, INCLUDING Service/Meter protection fuses and neutral links. Any subsequent alterations or additions to the metering arrangements must comply with these space requirements. 6.5.2.2 Commercial and multi-phase multiple domestic installations For all new commercial and multi-phase multiple domestic Customer Installations the minimum space to be provided for metering for each separately metered Customer Installation is: 300mm high x 200mm wide per unit. These spaces are to be marked on the switchboard and labelled “Metering Equipment Only”. No other equipment may encroach on this area, INCLUDING Service/Meter protection fuses and neutral links. Any subsequent alterations or additions to the metering arrangements must comply with these space requirements. 6.5.3 Existing metering installations For ALL existing Customer Installations a clearance of a minimum of 10mm must be maintained around the perimeter of installed metering equipment. Where any existing Customer Installation is fitted with a new meter panel and surround, energised after these requirements and any subsequent alterations or additions to the metering arrangements, the minimum space to be provided for metering for each separately metered customer installation will be as stated in clauses 6.5.1 and 6.5.2. NW000-S0141 UNCONTROLLED IF PRINTED Page 28 of 60 S0141 ES3 Metering Installation Requirements Part A 6.6 Amendment No 0 Fixing of metering equipment In addition to the requirements of the Service and Installation Rules of NSW, all securing points located on metering devices must not be tampered with, altered or modified in any way. All metering devices must be secured by all fixing points with the appropriately sized bolt. The bolts must be installed in such a manner that they will not cause any damage to any cable insulation within the switchboard or cause any safety issues for persons working on the switchboard. 6.7 Metering requirements for embedded generation These installations can be metered in either a Gross or Net Bi-Directional Metering configuration. The metering configuration must use a ToU meter as per this document and meet the requirements of the customer’s installation. It is a requirement under the NERs that where distributed generation facilities exist, Bi Directional Metering must be installed as the standard metering configuration. The metering requirements of this clause only apply to small scale embedded generation facilities (e.g. embedded generator / inverter system) that are less than 10kVA per phase (up to a total of 30kVA) for Net Metered sites and 10kVA in total for a Gross Metered Complying Generator site. For installations greater than 10kVA per phase consult the local Field Operations Office for the correct process for making a connection application. All Bi Directional Metering will require specifically programmed electronic metering equipment designed to record the consumption of energy that is both Exported and Imported by a Customers Installation. Embedded generation connected at multiphase installations must be metered with an E3. ASP’s not following this directive will have the installation defected. All Bi-Directional Metering must be individually requested in advance from the Ausgrid’s local Field Operations office, and the ASP must clearly state in the application for the metering equipment, that it is for the purposes of metering a Bi-Directional Metered Installation. Each Bi-Directional meter will be specially marked to indicate the Structure that it has been programmed for, e.g. “Structure 21” or “Structure 25” may appear on a label affixed to the meter. Bi-Directional structures include 21, 23, 25, 26, 27, 29, 61, 64 and 65. All Bi-Directional Metering must be installed prior to the energising of the new or altered embedded generation system. The customer must liaise with their Retailer and ASP to determine the best arrangement for their circumstance. A connection application must be submitted in advance and an Ausgrid job number issued prior to commencing work on installations intended for metering embedded generation. (See ES1 - Premises Connection Requirements for further details). Once completed, a NOSW must be submitted to Ausgrid for all metering installed, removed and the NOSW must specifically identify which meter is the Bi Directional meter and what Structure is programmed into EACH electronic meter installed at the Customer’s Installation. For information regarding the process for obtaining approval to connect a small scale embedded generation system, refer to Ausgrid’s document ES1 - Premises Connection Requirements as well as Ausgrid’s “Connecting to the Network” page on our website http://www.ausgrid.com.au/Common/Our-network/Connecting-to-the-network.ASPx Customers should contact their electricity Retailer for specific details related to their electricity account, or other Buy-Back tariff related issues. NW000-S0141 UNCONTROLLED IF PRINTED Page 29 of 60 S0141 ES3 Metering Installation Requirements Part A 6.7.1 Amendment No 0 Details required on the notification of service work form (NOSW) The correct Structure as detailed in Table 8 (for Net metered sites), Table 9 (for Gross metered sites) and identified on the electronic meter MUST be indicated in the tariff box on the NOSW form that is submitted to Ausgrid for EACH electronic meter installed on the Customer’s Installation. 6.7.2 Embedded generation metering requirements The metering requirements for metering embedded generation installations are outlined in Table 5. Only certain specifically programmed E1, E2 and E3 meters are capable of registering Bi Directional energy flow. See Ausgrid’s document ES3 Part B, Technical Specifications for Metering Installations for compatible Bi-Directional Metering equipment. For information related to Gross Metering, refer to Clause 6.7.5. 6.7.3 Net metered embedded generation requirements Where a customer proposes to connect a small scale embedded generation facility to an installation for the purpose of generating electricity for use within their installation and/or exporting any excess electricity back into Ausgrid’s Network, as a minimum a suitable Net Metered BiDirectional Metering configuration must be installed to capture the exported energy. This is required even if the Customer’s Installation may not generate energy back into the Ausgrid Network. This means that if the customer’s installation has any embedded generation, a Bi Directional Metering Installation must also be installed. Table 5 outlines the configurations that may be used for a Net Metered embedded generation systems. The wiring configuration is as specified in figure 1 - 8 are suitable for Net Metered installations only. Generation at multi-phase sites are permitted so long as they meet the requirements of ES1 Premises Connection Requirements. For two or three phase 100A installations, irrespective of the number of phases of the generator, a single E3/E3c must be used. Multiple single phase meters are not permitted. See figure 6 for wiring configuration of an E3/E3c meter connected to 2 phase and figure 4 for the wiring of an E3/E3c meter connected to 3 phase. For 2 phase connections a specific meter must be ordered from Ausgrid. The standard Net Metering configurations are identified in Table 5 and the structures are identified in table 8. The wiring diagrams for Net Metered installations are documented in figure 1 - 8 and is the standard connection arrangement. Subject to the availability of metering stock, the equivalent contactor meter and associated structures may be issued. However this does not affect any customer, tariff of ASP conditions. Table 8 Structures for net metered installations Type of Meter for a Net Metered Installation Net Meter Program Structure to be indicated on NOSW Equivalent Equipment that that may be issued Single Phase (E1) Structure 21 E1c / Structure 61 Single Phase/Off Peak (E2) Structure 23 E2c / Structure 64/65 Three Phase (E3) Structure 21 E3c / Structure 61 NW000-S0141 UNCONTROLLED IF PRINTED Page 30 of 60 S0141 ES3 Metering Installation Requirements Part A 6.7.4 Amendment No 0 Registration of bi-directional energy flow in ToU meters The National Electricity Rules requires the measurement of import and export power flows to be recorded separately. However there is also a requirement that the metering measurement is consistent whether the generation is attached to single phase, two phase or three-phase connections to the network. All Ausgrid E3/E3c meters add the instantaneous (maximum every second) power flow (magnitude and direction) in each of the three phases. The resultant, depending on the dominant flow, is accumulated in the import or export kWh register. This approach achieves the consistency across the different network connection configurations and credits the customer for the full value of any generation. This is particularly important in examples such as single phase embedded generation systems connected to three phase supply. In such an example, the single phase generation will offset any consumption in the other two phases. This is also why a single E3/E3c (rather than multiple E1’s) is mandatory for any embedded generation connected to multi-phase installations, as detailed in Table 5. The following example illustrates how the meter will record energy. If the following unity power factor current is flowing through the meter: (a) A Phase 8 Amps consumption (1.84kW @ 230V AC); (b) B Phase 12 Amps consumption (2.76kW @ 230V AC); (c) C Phase 7 Amps generation (1.61kW @ 230V AC). The resultant power flow registered by the meter would be +1.84kW + 2.76kW – 1.61kW ≈ +3.0kW toward the premise. The subsequent energy recorded by the meter would be based on this net power. Over a half hour period, this would register +1.5kWh of energy being consumed at the premise. 6.7.5 Gross metered embedded generation requirements The standard Gross Metering configurations are identified in Table 9. The wiring diagrams for Gross Metered installations are documented in this clause. NW000-S0141 UNCONTROLLED IF PRINTED Page 31 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Table 9 Gross metered embedded generation requirements Supply Arrangement Gross Bi-Directional Metering Configuration Meter Program Structures Required in the Tariff column on the NOSW Form Controlled Load Embedded Generation # 1 1-phase None 1-phase E1 Str 19 1a* 1-phase None 1-phase E2b Str 26 Str 26^ 2 3-phase None 1-phase E3 E1b Str 25 Str 19 Str 19 Str 25 3 1-phase 1-phase 1-phase E2 E1b Str 20 Str 25 Str 20 Str 25 4 3-phase 1-phase 1-phase E3 Str 19 Str 19 Str 27 5 3-phase 3-phase 1-phase E3 E3 E1b Str 19 Str 19 Str 25 Str 19 / Str 19 Str 25 Item Principal Tariff Key E1b Str 25 E2b Str 27 L Principal Meter Gross Buy Back Meter Str 19 Str 25 Electronic Meter: 1 meter only. There is no load control associated with this meter. E1b Electronic Meter: 1 meter only, programmed for bi-directional energy measurement. There is no load control associated with this meter. Electronic Meter: 1 meter with a 1 load control element (with internal ripple frequency relay or time switch). See clause 2.1.6 for more information on the requirements for controlled load. E2b Electronic Meter: 1 meter with 2 metering elements, one of which is programmed for bi-directional energy measurement – See wiring diagrams below for element arrangement. Electronic Meter: 3 meter only. There is no load control associated with this meter. Load Control Unit (ripple frequency relay or time switch for up to 25A switching. See clause 2.3.6 for more information on the requirements for controlled load. * Item 1a is for space saving situations only. If installed at a site where the arrangement under Item 1 could have been installed, a defect will be raised against the ASP and metering will be required to be changed to Item 1. Particular attention should be taken regarding the wiring configuration of this meter in figure 10. # For multi-phase embedded generators, contact the local Field Operations office for an appropriate Gross Metering configuration. ^ The tariff applicable for this meter is to be located in the principal tariff column of the NOSW form. NW000-S0141 UNCONTROLLED IF PRINTED Page 32 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 If Net Metering is required in addition to the Gross Metering identified in the above table replace the existing structure 19 meter with a structure 21 meter of the same type (E1, E2, E3). Clause 2.7.6 and Table 8 provide guidance on these configurations. The following clauses contain the standard wiring diagrams required for the connection of a Gross Metered installation. Specific wiring and technical details related to the individual metering devices can be found in ES3 - Part B, Technical Specifications for Metering Equipment. Each of the wiring diagrams below can be directly related to each item in Table 9 above. 6.7.5.1 Gross metering configuration 1 Figure 9 Single phase principal tariff with no off peak connection 6.7.5.2 Gross metering configuration 1a Figure 10 Single phase principal tariff with no off peak connection NW000-S0141 UNCONTROLLED IF PRINTED Page 33 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 6.7.5.3 Gross metering configuration 2 Figure 11 Three phase principal tariff with no off peak connection 6.7.5.4 Gross metering configuration 3 Figure 12 Single phase principal tariff with single phase off peak tariff NW000-S0141 UNCONTROLLED IF PRINTED Page 34 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 6.7.5.5 Gross metering configuration 4 Figure 13 Three phase principal tariff with single phase off peak tariff 6.7.5.6 Gross metering configuration 5 Figure 14 Three phase principal tariff with three phase off peak tariff NW000-S0141 UNCONTROLLED IF PRINTED Page 35 of 60 S0141 ES3 Metering Installation Requirements Part A 6.7.6 Amendment No 0 Adding additional bi-directional metering Customers that have existing gross embedded generation can add a separately metered additional embedded generation system. Any metering configurations must meet the requirements of this document. The available configurations are: (a) Net and Gross (i) Alongside the existing Gross generation, convert the adjacent General Supply to Buy Back metering – OR (ii) Alongside the existing General Supply Buy Back metering, install Gross Generation metering (b) Gross and Gross (i) Installing a second Gross generator alongside the first Gross Generator (but with no change to the General Supply) Multiple separately metered Net systems on different network tariffs are not permitted as intermixture between the two systems could occur. 6.7.6.1 General guide to follow To add a new net metered embedded generation system, as a basic rule, remove the existing structure 19 meter and replace it with a structure 21 meter. To add a new gross meter the ASP must install a separately metered structure 25 gross meter or a structure 29 meter. When completing metering the ASP must ensure the metering correctly aligns with the correct embedded generation system, and this is to be noted on the NOSW. Before connecting these systems, a Connection Application must be submitted to. Visit Ausgrid’s website at http://www.ausgrid.com.au/Common/Our-network/Connecting-to-the-network/How-do-Iconnect-to-the-network/Connection-application-forms-and-guides.ASPx for further details. When connecting embedded generation under a net metered arrangements, single phase embedded generation connected to a three phase supply must utilise a three phase net meter to ensure they receive the full benefits of their embedded generation. Note: Voltage Rise calculations (as per Service and Installation Rules of NSW) will be required if the total connected embedded generation on any phase equals 5kW’s or greater. NW000-S0141 UNCONTROLLED IF PRINTED Page 36 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 6.7.6.2 Alternate gross and net metering configuration 2 Figure 15 Single phase principal tariff with net and gross generation 6.8 Energising metering Ausgrid’s document ES4, Service Provider Authorisation details the requirements for ASP’s when energising works associated with their Authorisation agreement. Other checks that are specific to metering are listed below and must be completed in conjunction with the checks required in ES4. The ASP must: (a) Ensure that the meter is installed as per the requirements of ES 3 Part B, Metering Specifications; (b) Ensure that the date on the meter display is correct if it is a ToU meter; (c) Ensure that the time on the meter is within 5 minutes of Australian Eastern Standard Time (AEST) if it is a ToU meter. NOTE: the meters are set to AEST, during summer time the meter time will show one hour slow; (d) Verify the readings on each energy consumption register, if it is not zero, then these reading(s) must be included on the NOSW form for the installed meter; (e) Verify that upon energisation, all meters are registering correctly; (f) Verify that there has been no reverse energy flow on the meter by checking the appropriate meter flags on the display (see ES3 Part B for more information in these visual indicators); (g) Verify that LCUs (if used) are suitable for the connected off peak tariff; (h) Verify that time switches (if used) have the correct on/off times; If any of the above checks give an unsatisfactory result, Ausgrid’s local Field Operations office must be notified immediately so that an Ausgrid technician can attend the site to rectify the error found. NW000-S0141 UNCONTROLLED IF PRINTED Page 37 of 60 S0141 ES3 Metering Installation Requirements Part A 6.9 Amendment No 0 Metering With remote data acquisition capability ASP’s acting on behalf of Ausgrid as a Type 5 /6 meter installer are not permitted to remove, install or alter metering which has remote data acquisition capability, such as Type 1-4 metering (see clause 3 for further information on identifying a Type 1-4 metering installation) or other Ausgrid Network installed metering with communications (such as chronic access or Advanced Metering Infrastructure (AMI) trials), unless the ASP has been directly engaged by an AEMO Metering Provider to do so. Remote communications can be typically identified by the connection of a modem to the meter’s serial port under the terminal cover of the meter. The modem itself is typically also located under the terminal cover and sometimes in an adjacent enclosure. 6.9.1 Remote communicating meters permitted to be removed The only exception to this rule are meters with the meter prefix, LGA, LGB and LGC, see figure 6 for an example of what these meters look like. These meters were used for the Federal government funded Smart Grid Smart City (SGSC) project which has now been completed. If an ASP attends a site with this metering installed, the ASP is permitted to remove the meter and incorporated communications unit (self-contained in the upper part of the meter) and associated antenna wiring. If the meter needs to be relocated, the ASP is to remove the communications module and associated antenna and wiring and reinstall the meter only. The antenna array consists of two adhesive antennas. If the ASP can remove the antennas without causing damage to the customers’ switchboard, the ASP must remove both antennas and associated coaxial cabling. If the antennas cannot be removed due to the possibility of damaging the customers’ switchboard, the ASP may cut the coaxial cable as close to the antenna as possible and remove the coaxial cabling. In both of the above cases where the cabling is removed, the ASP must ensure that the fire protection and moisture ingress capabilities of the switchboard are not compromised. Figure 16 Example of a smart grid smart city meter NW000-S0141 UNCONTROLLED IF PRINTED Page 38 of 60 S0141 ES3 Metering Installation Requirements Part A 7.0 Amendment No 0 METERING REQUIREMENTS TYPE 1 - 4 METERING INSTALLATIONS Note: This chapter must be read in conjunction with the Metering Contestability FAQ document available from the Ausgrid Website. Customers that have an annual consumption greater than 160MWh per annum must have Type 14 metering installed. Customer that have an annual consumption less than 160MWh per annum can opt into Type 4 metering subject to the Retail offering. Type 1-4 metering installations must have remote data acquisition capability (communications on their metering equipment). In addition to the requirements of this document, a Type 1-4 metering installation must also comply to specific requirements of the NER and AEMO Metrology Procedures. This includes the allocation of an MPB (to install and maintain the metering installation) and an MDP (to collect and process the metering data from the meter). The behaviour of the MPB is also governed by the AEMO Service Level Requirements for MPB’s which includes the obligation to comply with the requirements of the local jurisdiction (such as Service and Installation Rules of NSW and Code for safe installation of direct-connected whole current electricity metering in NSW) and the local network, such as described by this document. The Metering Provider (MPB) and Meter Data Provider (MDP) must be appropriately accredited by AEMO to provide the relevant metering services in the National Electricity Market for the Type of metering installation installed. Meter installers working on behalf of an AEMO accredited MPB, must also be accredited and authorised by Ausgrid as a Level 2 Category 4 ASP at a minimum qualification. All metering training, tools, testing equipment, metering equipment and associated documentation must be provided by the MPB. Only an AEMO accredited MPB or their approved representative may install, remove or alter a Type 1-4 Metering Installation. NW000-S0141 UNCONTROLLED IF PRINTED Page 39 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 A guide to the identification of an existing Type 1 – 4 metering installation is as follows: For metering installations where Ausgrid MP is not the MPB, the meter is labelled with a third party Metering Provider name, (for example Metering Dynamics or Integral Energy); For metering installations where Ausgrid MP is the MPB that the meter is labelled with Ausgrid, EnergyAustralia or TCA and has a program structure of structure 11, 22 or 72, which consist of the following register displays: Table 10 Ausgrid meter register displays Structure 11 Structure 22 Structure 72 Register Number Description Register Number Description Register Number Description 1 Date 1 Date 1 Date 2 Time 2 Time 2 Time 3 Total Export kWh 3 Total Export kWh 3 Total Export kWh 14 Total lag kVar 4 Total Import kWh 4 Total lag kVar 15 Total lead kVar 93 Total lag kVar 63 Total Import kWh 94 Total lead kVar 94 Total lead kVar If any service works are required to be conducted during a Type 1-4 meter installation, and appropriately Accredited and authorised ASP must be engaged to conduct these works. See ES4 – Service Provider Authorisation for further details. The MPB is responsible for the quality of the work delivered by their meter installer. 7.1 Notification requirements for new installations In addition to clause 5.2, for new CT or HV Metered Installations the MPB must submit a completed NOMW form, Appendix A to Ausgrid as detailed below within five working days of completion of a new Metering Installation as per the requirements defined in Ausgrid document ES 1 – Premises Connection Requirements. A Certificate of Compliance, Electrical Work (CCEW) must be submitted to Ausgrid for any electrical work that is completed in association with the metering work. For new whole current Metered Installations the MPB must submit a completed NOMW form, Appendix A, a completed CCEW form from the installing electrical contractor and any other associated standard NOSW forms (e.g. for new service line) from ASPs, to Ausgrid as detailed below within five working days of completion of a new metering installation as per the requirements defined in Ausgrid document ES 1 – Premises Connection Information. NW000-S0141 UNCONTROLLED IF PRINTED Page 40 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Where onsite generation is connected as a part of the new installation, the MPB must include confirmation on the NOMW form that the metering is programmed to register bi—directional energy flows as required by the NERs. NOMW Form Lodgement Information Fax: 1300 662 389 Email: [email protected] Note: Where any service works are involved a NOSW must be submitted to Ausgrid within two working days. See ES4 for further details. 7.2 Notification requirements for existing installations Where a Type 1-4 Metering Installation (including Bi-directional metering) is to be installed by MPBs at an existing Customer Installation, a completed NOMW form Appendix A showing meter numbers and final meter readings must be submitted to Ausgrid as detailed in clause 7.1 within five working days of the meter replacement. Refer to Appendix A for a copy of this NOMW form. MPBs must also notify Ausgrid if altering or removing non-Ausgrid Type 1-4 metering, within five working days of the meter replacement. A completed NOMW form showing meter numbers and final meter readings must be submitted to Ausgrid as detailed in clause 7.1. Where onsite generation is existing or a new system connected, the MPB must notify Ausgrid via the submission of a NOMW form that the metering is programmed to register bi—directional energy flows as required by the NERs. Any completed electrical installation work must be notified (using a CCEW form) to the local Installation Data Operations office within 14 days of work completion, as per regulatory requirements. Any recovered Ausgrid metering equipment must be returned to Ausgrid as per the requirements in Section 10. Note: Where any service works are involved a NOSW must be submitted to Ausgrid within two working days. See ES4 for further details. 7.3 Entry to Ausgrid substations Access to Ausgrid sub-transmission, zone or distribution substations for non-Ausgrid MPB’s is not permitted. Instead, Ausgrid will carry out, free of charge, any work on the meter panel and any work dealing with any secondary wiring directly related to the metering. Any work beyond this, for example instrument transformer CT or VT testing will be charged at full cost recovery to the meter installer. Ausgrid will enter a contractual arrangement with the MPB to allow these works to occur. The MPB may witness the work and if so the MPB must comply with any instruction from Ausgrid and must also comply with the requirements of Ausgrid’s Electrical Safety Rules. Any alterations, upgrades and new metering must not be installed within Ausgrid’s substations. To avoid future access inconvenience and expense it is strongly recommended that MPBs make arrangements to relocate any existing metering equipment from within Ausgrid substations to the customer’s premises wherever possible. For any enquiries with regard to access to substations please contact Ausgrid using the following email address [email protected]. NW000-S0141 UNCONTROLLED IF PRINTED Page 41 of 60 S0141 ES3 Metering Installation Requirements Part A 7.4 Amendment No 0 Commercial agreements The new MPB must negotiate an agreement with Ausgrid or the incumbent MPB if it proposes to re-use existing suitable metering equipment (owned by Ausgrid or the incumbent MPB). 7.5 Information on existing Ausgrid metering equipment For large market customers, Ausgrid will on request provide MPBs or Market Participants with information on a customer’s existing Ausgrid metering equipment (if available), where the MPB has been contracted by the customer. Information would include: technical specifications including meter numbers and instrument transformer ratios meter location test results of instrument transformers and metering if applicable. Contact the Business Support section at Ausgrid using the email address [email protected] for provision of the above information. For Small Retail Customers, refer to the Ausgrid Metering Contestability FAQ, available on Ausgrid’s website. 7.6 Metering data requirements Where an existing Ausgrid Type 1-4 Metering Installation located within Ausgrid’s distribution area is replaced with a new Type 1-4 Metering Installation in anticipation of future transfer to another MPB, the MPB must via their selected MDP provide Ausgrid with meter data in NEM format from the date the metering was installed up until the time of the market transfer as per the AEMO Meter Churn Data Management Rules. This data must be provided at no cost. The MPB and Responsible Person (RP) must follow the AEMO Metrology Procedure, MSATS Procedures and any other relevant NEM procedures for the provision of data. At existing Type 1-4 Metering Installations, MPBs must organise a final download of data with the existing MDP before any metering is removed or replaced. 7.7 Compliance with Ausgrid’s safety plans All ASPs working on behalf of MPBs carrying out work on or near Ausgrid’s distribution system must have current Ausgrid Authorisation in accordance with conditions detailed in publication ES 4 – Service Provider Authorisation and fully comply with Ausgrid's Electricity Network Safety Management System and Electrical Safety Rules. Breaches of the conditions may lead to referral to NSW Fair Trading, AEMO and Safe Work NSW. 7.8 Controlled load tariff switching Where controlled load functionality is required where Type 4 metering is installed, it is the MPBs responsibility to arrange for suitable load control functionality. If the load control is incorporated within the MPBs meter, the functionality must comply with appendix B of ES7 - Network Pricing Guide, unless an exemption is agreed between the MPB and Ausgrid. If an external non Ausgrid LCU is installed, an LCU with the appropriate settings as per the customer’s tariff requirements is required, and the LCU must meet the requirements of appendix B of ES7 – Network Pricing Guide. Ausgrid can provide an appropriate LCU upon request at no cost. However for MPBs to be issued Ausgrid LCUs, the MBP must meet the meter issue requirements outlined in ES4 – Service Provider Authorisation and the equipment must be installed by an appropriately authorised ASP. If the load control is switched by a Type 5 E2 meter, this must not be left onsite, but must be returned to Ausgrid as outlined in clause 6, so that a final read may be conducted. Note: Only LCUs that have been approved for use by Ausgrid may be used for controlled load tariffs. NW000-S0141 UNCONTROLLED IF PRINTED Page 42 of 60 S0141 ES3 Metering Installation Requirements Part A 7.9 Amendment No 0 Labelling and contact details Type 1-4 Metering Installations installed by MPBs, must be clearly labelled with the name of the MPB, on the meters or the meter panel. Each metering installation shall be clearly labelled on each meter panel with the National Metering Identifier (NMI) for the Type 1-4 Metering Installation. 7.10 Location of type 1-4 metering installations Clause 4.2.3.5 of the SIRs of NSW allows for remotely read meters to be located within a customers tenancy at the customers expense. The Service Protective Device must be accessible to Ausgrid as required by the SIRs of NSW. 7.11 Checklist for type 1 to 4 metering installations This installation checklist is for the guidance of MPBs when carrying out installation of Type 1 to 4 Rule Compliant metering on customer’s installations within Ausgrid’s distribution area. These installations must comply with the current versions of all of the following, as appropriate: (a) Service and Installation Rules of NSW (b) Ausgrid’s ES and NS Documents (c) AS/NZS 3000 Wiring Rules (d) AEMO’s Service Level Procedures: Metering Provision Services for the Provision, Installation and Maintenance of Metering Installation Types 1 - 6 (e) The National Electricity Rules (f) AEMO Metrology Procedure (g) NSW Code for safe installation of direct connected electricity metering The following list covers the specific requirements for Rule Compliant Type 1-4 Metering Installations: (a) The MPB must be or must employ an ASP with Ausgrid authorisation to carry out any service works in Ausgrid's distribution area. This is in addition to having appropriate MPB accreditation from AEMO. (b) The appropriate paperwork must be submitted to Ausgrid as per clauses 7.1 and 7.2 of this document. (c) A NOMW form (appendix A) (including meter numbers and final meter readings) must be submitted to Ausgrid as per clause 7.1 within five working days of work completion where new Type 1-4 Metering Installation is installed on an existing installation. Recovered Ausgrid metering equipment must be returned (in as found condition) within seven days of recovery to one of the Ausgrid depots detailed in Section 6 and include a copy of the NOMW form. NW000-S0141 (i) When returning Ausgrid metering equipment, MPB’s must also comply with the requirements of Section 10 of this policy. (ii) MPBs must also notify Ausgrid if altering or removing non-Ausgrid metering, within five days of the meter replacement. A completed NOMW form showing meter numbers and final meter readings must be submitted to Ausgrid as per clause 7.1. UNCONTROLLED IF PRINTED Page 43 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 (d) CCEW forms must be submitted to the local Ausgrid Installation Data Operations office within 14 days of completed electrical installation work, as per regulatory requirements. (e) New metering equipment installed by the MPB must be commissioned at the same time that the customer takes supply. At no time should supply to the Customers Installation be left unmetered. (f) Clear labelling of the name and contact details of the MPB, must appear on either the meters or the meter panel. (g) Each metering panel must be clearly labelled with the National Metering Identifier (NMI). (h) The installation must be metered correctly. LCUs should have correct time switch or frequency and channel settings. (i) The MPB must negotiate an agreement with Ausgrid or the incumbent MPB if it proposes to re-use existing suitable metering equipment (owned by Ausgrid or the incumbent MPB), (excludes Ausgrid’s LCUs). (j) On-site summation metering is generally not approved in Ausgrid’s network area. (k) The communications power supply must be appropriately double insulated or earthed. (l) Where NER Compliant Type 1-4 CT metering is installed, unmetered supply may be used for the associated data and communications equipment only (e.g.modem). This equipment must be connected to a sealable link on the load side of the meter test block (between the test block and the metering) and sealed using and appropriate approved sealing system. (i) Where NER Compliant Type 4 whole current metering is installed, unmetered supply may be used for the associated data and communications equipment only. However, where a metered active link is already available (for that customers installation), the supply for the data and communications equipment must be taken from this metered link. (ii) The above mentioned data and communications equipment must be protected by a sealable HRC fuse or circuit breaker with a maximum rated current of 2A (to grade with the 10A HRC meter potential fuse, where CT or HV metering is installed). This equipment does not need to be controlled by a separate main switch and must be direct wired to the supply (socket outlets are not permitted). Communications equipment which is powered directly from the revenue meter and has its own internal protection within the meter does not require additional fault protection. (m) Adequate segregation must be maintained between extra-low voltage and low voltage cables and equipment, within the communications unit and switchboard, in accordance with AS/NZS 3000 Wiring Rules. (n) For greenfield installations where the MPB is NOT the testing contractor, all of the main/isolation switches must be sealed in the off position and tagged appropriately, in accordance with ES4 – Service Provider Authorisation. This is to ensure that only the testing contractor or the person responsible for re-testing the installation can energise the installation. (o) The MPB must apply seals at all appropriate termination points and at any other unmetered sections of the Metering Installation. (p) MPBs must not interfere with or remove Ausgrid’s metering equipment without appropriate authorisation or approval. (q) The installation must be suitably labelled with the correct instrument transformer ratios, represented as the K factor for the site. NW000-S0141 UNCONTROLLED IF PRINTED Page 44 of 60 S0141 ES3 Metering Installation Requirements Part A 8.0 Amendment No 0 LOW VOLTAGE CURRENT TRANSFORMER METERING REQUIREMENTS The following information describes the metering specifications and associated requirements for customers and their retailer/metering provider, wishing to connect to Ausgrid’s Network at low voltage, three phase connections greater than 100A. Customers must ensure that these requirements are incorporated into the planning of their electrical installation. Energisation of the switchboard will not be permitted unless the following specification and associated requirements are met in full. 8.1 Prior to commencement of switchboard installation Prior to the commencement of any prospective switchboard installation for low voltage connections greater than 100A, the metering installation design and associated details must be submitted to Ausgrid Installation Inspectors. This process is the switchboard pre-approval stage of construction as required by the SIRs if NSW and should include the exact detail of: (a) the specific Low voltage CT’s proposed for installation in a customer’s switchboard; (b) the requirements of the primary conductors; (c) the requirements of general installation and the secondary conductors; must be submitted to Ausgrid Installation Inspectors (Field Operations office responsible for the mandatory inspection as detailed in ES1) at the switchboard pre-approval stage of construction. The requirements are detailed in the next sections. 8.2 Low voltage CT’s Low voltage CT’s must be selected to ensure that the expected maximum demand of the primary conductor falls between 25% and 100% of the CT’s primary rating. Low voltage CT’s are available for sale from Ausgrid. Alternatively the customer can supply their own CT’s 8.2.1 Low voltage CT’s supplied by Ausgrid. Ausgrid supplied CT’s are sold through the Field Operations office. These CT’s fulfil the specifications and associated Ausgrid requirements. NW000-S0141 UNCONTROLLED IF PRINTED Page 45 of 60 S0141 ES3 Metering Installation Requirements Part A 8.2.2 Amendment No 0 Low voltage CT’s not supplied by Ausgrid. Low voltage CT’s for proposed Type 5 metering installations not supplied by Ausgrid must fulfil the following requirements in full in order to be approved for installation: (a) Preferred CT Ratios of 200/5, 800/5, 1500/5 or 2000/5. (b) CT burden rating of 5VA or 15VA. (c) CT of Class 0.5S Extended Range 200% built to and design type tested to AS60044.1–2007 with evidence of such compliance through the presentation of type tests supplied from a laboratory accredited by NATA or other Accreditation Body that is a signatory of the ILAC MRA). (d) Supply Individual CT amplitude and phase accuracy test results (a) carried out in accordance with AS60044.1-2007 (b) with the results traceable and sourced from a laboratory that is qualified under ISO/IEC 17025-2005 General requirements for the competence of testing and calibration laboratories and is accredited for that qualification by NATA or another accreditation body that is a signatory of the ILAC MRA and (c) to a measurement uncertainty of ±0.1% for the amplitude error and ±0.1 crad for the phase error, based on a 95% confidence level. (e) Supply a Certificate of Compliance in PDF format detailing the individual test results, references to the laboratory qualifications and a report number to uniquely identify the Certificate. (f) Ensure that the individual test point results are supplied at the all of the following test point: 1%, 5%, 20%, 100%, 120% and 200% of rated current and tested at both 25% rated burden and 100% rated burden. (g) Ensure that the supply of individual test results is delivered in in CSV, XLS or XLSX file format with one result per row in the following columns format: CT Serial Number Test Date Ratio % Rated Current % Rated Burden % Amplitude Error crad Phase Error Report Number (h) The above test reports must be provided to Ausgrid’s local field operation office, prior to energisation of the switch board. 8.3 Low voltage CT primary conductor requirements The arrangement is required to comply with the following: (a) If the customer's cables cannot be terminated at the service fuses, links or fixed terminals may be used. (b) The length and arrangement of the primary cable between each CT and the corresponding line-side terminal must be sufficient to permit flexing without tight bending of the cable when installing the CTs. This length must not exceed 1000mm. (c) The line side terminals for the connection of cables passing through CTs must be located no higher than 2700mm and no lower than 450mm from the ground, floor or platform from which access is obtained. (d) Each cable must terminate in a separate lug. If the cable is terminated in a soldered or crimped lug, the lug must be of dimensions which enable the CT to pass over it. NW000-S0141 UNCONTROLLED IF PRINTED Page 46 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 (e) With the exception of stranded cables smaller than 95mm2, space not less than 300mm is required between the CT and the position where flexing of the cable is restrained by a conduit or other fixture or joint on the load side of the CT. (f) The CT Unit is designed for surface mounting above or below 200 - 400A service fuses. When the unit is installed above the service fuses, the layout of equipment of the unit and the spacing between the unit and service fuses will remain as drawn. Other suitable arrangements may be used provided the general principles are followed. (g) The customer is required to erect a 12mm thick, approximately 325mm x 435mm fire retardant treated ply or similar panel in a suitable position on battens. Alternatively, an insulating panel on a surround may be used. (h) The customer is required to provide and connect the metering wiring between the standard CT unit and the metering panel. (i) 8.4 A cover must be provided and installed by the customer if required to protect the CTs. General requirements of CT installation and secondary conductors The customer must also ensure that the annual electrical energy consumption of the installation aligns to the Type of metering installation (Type 1-5) proposed to be installed. Consideration should also be given to any expected load growth of the installation. The minimum requirements of the metering installation Types can be found in Chapter 7 of the National Electricity Rules. The installation must also comply with the current versions of NS 195, AS3000, AS2067, the National Electricity Rules and AEMO Metrology Procedure. 8.4.1 CT metering test block requirements In addition to clause 4.19.4 of the Service and Installation Rules of NSW, the meter test block shall comply with the following requirements: (a) Shall be located on the front of the metering panel; (b) The voltage and current test links shall be of a slide link type that allows for an isolation point and contain sockets at the top and bottom of the link allowing for the insertion of a test plug; (c) The voltage and current test links shall be installed in such a way that the slide link will fall to the closed position if released; (d) The cover of the test block must have a facility to be appropriately sealed by an approved Metering Provider to prevent unauthorised access. 4.4.2 Secondary conductors To clarify Table 4.5 of the Service & Installation Rules, the following table which details maximum route length of secondary conductors, references the VA rating of the CT secondary circuit rather than the primary maximum demand. Table 11 Maximum route length of secondary conductors NW000-S0141 Conductor csa (mm2) 5VA Rated CT Length in metres 15VA Rated CT Length in metres 2.5 10 20 4 16 32 6 25 55 10 40 90 UNCONTROLLED IF PRINTED Page 47 of 60 S0141 ES3 Metering Installation Requirements Part A 8.5 Amendment No 0 Arranging metering for a low voltage CT installation Any low voltage CT metering installation that requires Type 5 metering requires metering to be arranged via Ausgrid. Type 5 LV CT metering is a monopoly function and fees apply for the Type 5 meter and for the installation of the meter. These fees are documented in Ausgrid’s Connection Policy – Connection Charges. 9.0 HIGH VOLTAGE METERING REQUIREMENTS The following information defines the specifications and Ausgrid requirements for customers and their retailer/metering provider, wishing to connect to Ausgrid’s Network at high voltage. Customers must ensure that these requirements are incorporated into the planning of their electrical installation. The customer must also ensure that the annual electrical energy consumption of the installation aligns to the Type of metering installation (Type 1-5) proposed to be installed. Consideration should also be given to any expected load growth of the installation. The minimum requirements of the metering installation Types can be found in Chapter 7 of the National Electricity Rules. The installation must also comply with the current versions of NS 195, AS3000, AS2067, the National Electricity Rules and AEMO Metrology Procedure. 9.1 Instrument transformer compliance All instrument transformers that are to be used for National Electricity Market metering purposes must comply with Chapter 7 of the National Electricity Rules and the AEMO Metrology Procedure. Instrument transformers must have a valid pattern approval issued under the authority of the National Measurement Institute or, until relevant pattern approvals exist, a valid type test certificate. Note: all instrument transformer designs MUST have a valid type test certificate that meets the full type test requirements of the appropriate Australian Standard even once the National Measurement Institute pattern approval exemption is lifted. Each individual instrument transformer MUST be supplied with routine test results to the appropriate Australian Standard with traceability to National Standards and a statement of the Estimated Uncertainty of Measurement. Note: depending on the class of instrument transformer, different accuracy test points are required to be conducted on the transformer (e.g. class 0.5S CT requires an additional test point at 1% and a class 0.5ME CT requires an additional test point at 2.5%). All reference/calibration equipment used for the purpose of meeting the routine and type testing obligations identified within this clause must be tested to ensure full traceability to test certificates issued by either: (a) A NATA accredited body; or (b) A laboratory recognised under the International Laboratory Accreditation Corporation (ILAC) mutual recognition agreement. Further details of ILAC laboratories can be found at www.ILAC.org/. It is the responsibility of the customer to prove to Ausgrid that the test reports supplied comply with the above criteria. All test reports must be supplied to Ausgrid at least 2 weeks prior to the installation of the instrument transformers. Once these reports have been submitted, Ausgrid will review the reports and if the reports meet the requirements as defined by the National Electricity Rules, they are accepted and the customer is then notified. The customer will also be notified if the reports are unsuitable. NW000-S0141 UNCONTROLLED IF PRINTED Page 48 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 In addition, copies of the test reports must be forwarded by post to: VT/CT Test Results, - Metering Technology Group, Ausgrid 48-50 Holker Street, Silverwater NSW 2128, or fax to (02) 8719 3022 or email to [email protected] at least two weeks prior to the instrument transformers being installed. If the type test and routine test are not supplied and accepted by Ausgrid, the installation will not be energised. In addition to the above mentioned mandatory NER test requirements, the pre-commissioning tests outlined in NS195 must also be completed and results provided to Ausgrid prior to the proposed commissioning date. 9.2 Provision for instrument transformer testing All instrument transformers that are used for National Electricity Market metering purposes are required to be tested for accuracy at routine intervals as defined by the National Electricity Rules. Consideration should be given in the selection and installation of all instrument transformers associated with the metering, to ensure primary injection testing of an individual instrument transformer is practically achievable. 9.3 Voltage transformers All voltage transformers must be minimum class 0.5 for loads up to 1000GWh per annum, with a minimum burden of 25VA and a voltage factor of 1.9. The customer must also consider site specific requirements as outlined in the Australian Standards identified in the following clauses. Where the VT or VTs are installed within other switchgear the nameplate details of each VT must be indelibly and legibly marked on the outside of the switchgear. 9.3.1 Type 1 installations If the installation is determined to be classified as a Type 1 metering installation then the VTs must be class 0.2 with a minimum burden of 25VA and voltage factor of 1.9. 9.3.2 Single phase VTs Single phase inductive voltage transformers shall be manufactured and tested to comply with the current version of AS60044.2. Single phase capacitor voltage transformers shall be manufactured and tested to comply with the current version of AS60044.5. The secondary voltage shall be 110/√3 VAC per phase. The secondary winding terminals shall be marked a1 and a2. The a1 terminal on each phase shall be commoned and connected to an earth stud in the marshalling box. Where no marshalling box is fitted the earth point shall be in the metering panel. 9.3.3 Three phase VT Three phase voltage transformers shall be manufactured and tested to comply with AS1243 - 1982. The secondary voltage shall be 110VAC line voltage. The secondary star point shall be connected to an earth stud in the marshalling box. Where no marshalling box is fitted the earth point shall be in the metering panel. The neutral star point must be available at the secondary terminals. NW000-S0141 UNCONTROLLED IF PRINTED Page 49 of 60 S0141 ES3 Metering Installation Requirements Part A 9.3.4 Amendment No 0 VT secondary terminal boxes If the VT or VTs are to be installed outdoors the secondary terminals shall be contained in an IP55 rated terminal box. The terminal box shall have at least two conduit entry points capable of accepting 25mm conduit terminators and of the appropriate size to allow the easy termination of conductors, allowing for a minimum bending radius of 25mm. The lid of the terminal box is to be removable only by use of a tool and is to have the facility to be appropriately sealed by the approved Meter Provider to prevent unauthorised access. 9.3.5 VT circuit protection The primary circuit of the metering VT must be protected by a high speed protection device. The customer is advised to contact the switchgear designer or manufacturer prior to installation in order to determine the suitable protection device. Consideration should also be given to installation of a primary protection device for the VT even when the VT is installed within a high speed protection zone, this may prevent interruption of customer supply in the case of a VT failure. The secondary circuit protection of the metering VT must be as per clauses 9.7, 9.9 and 9.11 and as per the reference drawings available on the Ausgrid website. 9.4 High voltage current transformers Current transformers shall be manufactured and tested to comply with the current version of AS60044.1. All CTs must be class 0.5S with a minimum burden of 5VA. The customer must also consider site specific requirements as identified in this Australian Standard. All new HV installations must use three single phase CTs with 1 amp secondary windings. Contact Ausgrid’s Field Operations office to obtain details of the required CT ratio (or ratios if multi-tap CTs are required because of anticipated load growth). If multi-tap CTs are used the maximum tap setting must be equivalent to the rating of the associated switchgear. CT ratios appropriate to the connected/anticipated load must be used. Where possible, all CTs shall be installed so that the polarity of the HV terminals/P1 is facing the source of supply. If the P1 side of the CT faces the source of supply then the S1 terminal will be deemed to be the secondary polarity terminal. In the instance where CTs are installed in a stack within a circuit breaker and the polarity of the HV terminals/P1 cannot be installed to face the source of supply, the polarity of the secondary cabling is to be altered at the circuit breaker marshalling box and a label shall be installed to indicate the altered polarity. Where the CTs are installed within other switchgear their nameplate details of each CT must be indelibly and legibly marked on the outside of the switchgear. If the CTs are to be installed outdoors the CT secondary terminals shall be contained in an IP55 rated terminal box. The terminal box shall have at least one conduit entry point capable of accepting a 25mm conduit terminator. The lid of the terminal box is to be removable only by use of a tool and is to have the facility to be appropriately sealed by the approved Meter Provider to prevent unauthorised access. The CT secondary terminals shall be marked ‘S1’ to ‘Sn’. All CT ratios of multi-tap CTs must be brought out to terminal studs. Where a marshalling box is used, all CT ratios shall be terminated within the marshalling box. Where a marshalling box is not used, all CT ratios shall be terminated in the metering enclosure. CT non-polarities shall be commoned and connected to the earth stud in the marshalling box. Where no marshalling box is fitted, the CT non-polarities shall be commoned and connected to earth stud in the metering panel. NW000-S0141 UNCONTROLLED IF PRINTED Page 50 of 60 S0141 ES3 Metering Installation Requirements Part A 9.4.1 Amendment No 0 Type 1 Installations If the installation is determined to be classified as a Type 1 metering installation, or there is a chance that it may be determined as Type 1 in the future, then the CTs must be class 0.2S with a minimum burden of 5VA. In addition to the three revenue CTs an additional three class 0.2 CTs must be installed to provide the installation with full check metering. 9.4.2 Type 2 Installations If the installation is determined to be classified as a Type 2 metering installation, or there is a chance that it may be determined as Type 2 in the future, additional CTs will be required for partial check metering. Partial check metering shall utilise a second set of CTs. These CTs may be part of a CT circuit that is shared with other equipment as long as the shared circuits CTs have a class of no more than double the required class of the revenue metering CTs. Where a shared CT circuit is not available, a separate set of three CTs (one per phase) will be required with a class of no more than double the required class of the revenue metering CTs. 9.5 High voltage combined transformers Combined transformers shall be manufactured and tested to comply with the current version of AS60044.3 and meet the appropriate requirements of this document. 9.6 High voltage metering installation documentation Suitable drawings and supporting information, detailing the metering installation, must be submitted as part of the customers Installation Safety Management Plan (ISMP) for maintenance and auditing purposes. 9.7 Marshalling box In situations where access to the terminals of each CT is not readily available for burden measurement a marshalling box shall be installed as close as practical to the CT location. If the VT or VTs are installed remote from the metering location, a marshalling box shall be installed as close as practical to the location of the VT or VTs to allow burden measurement. The CT and VT secondary circuits may be terminated in the same marshalling box where required. Depending on the instrument type that will be marshalled within, the box shall be of adequate size to accommodate the following equipment: 9.7.1 3 black HRC fuse holders. Alstom Safeclip SC20H or similar 1 white, HRC fuse holder. Alstom Safeclip SC20HWH or similar Stud type terminals to terminate all VT secondary winding. (Utilux H3820 or equivalent). Tunnel type links and slide links will not be accepted. 9.7.2 VT/s CTs Stud type terminals to terminate all CT secondary wiring, including all ratios. (Utilux H3820 or equivalent). Tunnel type links and slide links will not be accepted. The potential fuses and link within the marshalling box shall have the facility to be appropriately sealed by the approved Meter Provider to prevent unauthorised access. All terminals shall have a cover that can be appropriately sealed by the approved Meter Provider to prevent unauthorised access. If the marshalling box is to be installed outside, an appropriate weatherproof enclosure is to be used. It shall have at least two conduit entry points capable of accepting 25mm conduit terminators. NW000-S0141 UNCONTROLLED IF PRINTED Page 51 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 All fuses and links contained within the marshalling box/s shall be numbered and labelled appropriately. A corresponding function table with each items function is to be laminated and attached to the rear of the marshalling box/es access door. 9.8 Secondary cables A stranded multi-core cable is to be installed between the CT/VT terminal boxes, marshalling box and the metering panel in accordance with the requirements specified in the NSW Service and Installation Rules and ES 1 - Premises Connection Requirements. Table 12 Cable size and maximum cable lengths for 1 amp CT secondary wiring Conductor csa (mm2) 1A 5VA Rated CT Length in metres 1A 15VA Rated CT length in metres 2.5 180 430 4 230 700 6 350 1050 10 590 1750 16 930 2800 Table 13 Cable size and maximum cable length for 5 amp (existing installations only) CT secondary wiring Conductor csa (mm2) 5A 5VA Rated CT Length in metres 5A 15VA Rated CT length in metres 2.5 6 20 4 10 30 6 15 45 10 25 70 10 40 110 Table 14 Cable size and maximum cable lengths for VT secondary wiring NW000-S0141 Conductor csa (mm2) Length in metres 2.5 105 4 170 6 255 10 425 16 680 UNCONTROLLED IF PRINTED Page 52 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 The CT and VT secondary cabling must be appropriately lugged using ring type terminal lugs and terminated using a stud type terminal in the instrument terminal boxes and marshalling box (Utilux H3820 or equivalent). The other end of the cable must be appropriately lugged using ring type terminal lugs and terminated in the metering panel using a stud type terminal (Utilux H3820 or equivalent). All secondary cables shall be marked with a cable number to identify each cable within the metering circuit. A cable number shall be on each end of a cable. The numbering shall be as per the drawings as listed below and available via our website. 9.9 Metering panels and enclosures The metering panel must be located in an area which is accessible during normal business hours. The customer must make sure that access to the metering enclosure is never restricted or made unsafe. The minimum enclosure size per meter is 580mm (h) x 580mm (w), with the depth behind the panel no less than 75mm.This panel shall be hinged and be capable of being opened to the 90º position, additionally when the panel is in this position, a clearance of 200mm shall be maintained between the front face of the panel and any fixed object. If check metering is to be installed, a separate 600mm (h) x 600mm (w) enclosure must be installed to accommodate the check metering and associated equipment. For metering installations where it is preferable to install multiple metering points on a single panel, a panel layout design shall be submitted to Ausgrid’s Field Operations office during the design stage of the installation for approval. If the metering equipment is installed outdoors, an appropriate weatherproof enclosure is to be used. The size of the enclosure will depend on the number of services to be metered, however the enclosure size per meter shall be 580mm (h) x 580mm (w) x 250mm (d). Some installation environments will require the metering panel enclosure to have an IP55 rating to prevent the ingress of air borne particles, such as; coal dust etc. In corrosive environments, the enclosure shall be made of a suitable material to prevent corrosion and to protect the metering equipment installed within. It is the responsibility of the customer to ensure that these additional risks are identified in the design stage and the appropriate equipment is selected. The enclosure shall be locked in accordance with the NSW Service and Installation Rules. An Ausgrid approved locking system may be used, details of this locking system can be found in ES1 - Premises Connection Requirements. The CT and VT secondary cabling shall be terminated in the back of the metering panel using a stud type terminal (Utilux H3820 or equivalent). These terminations shall have a cover that prevents any contact with live exposed conductors and has the facility to be appropriately sealed by the approved Meter Provider to prevent unauthorised access. Isolation and test links shall be provided at the front of the metering panel. The isolation and test links must have an insulated cover that when in position, no conductor is exposed and must also have a facility to be appropriately sealed by an approved Meter Provider to prevent unauthorised access. The voltage and current test links shall be of a slide link type that allows for an isolation point and contain sockets at the top and bottom of the link allowing for the insertion of a test plug. Phoenix URTK/ or equivalent would be suitable for this purpose. These links shall be installed in such a way that the slide link will fall to the closed position if released. The details of the layout and wiring configuration shall be as per the list of drawings below. Detailed copies of these drawings and check metering drawings can be obtained via Ausgrid’s website http://www.ausgrid.com.au/NetworkStandardsDiagrams.aspx?docid=ES3 Part A NW000-S0141 UNCONTROLLED IF PRINTED Page 53 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Table 15 Layout and wiring configuration drawing list Title 9.10 Drawing Number Sheet Number High Voltage Metering - Schematic Diagram, Wiring Diagram & Panel Layout 221330 1 High Voltage Metering - Labelling & Equipment Details 221330 2 High Voltage Metering - Schematic Diagram, Wiring Diagram & Panel Layout Installation without Instrument Transformer Marshalling Box/s 221331 1 High Voltage Metering - Labelling & Equipment Details Installation without Instrument Transformer Marshalling Box/s 221331 2 High Voltage Metering - Schematic Diagram, Wiring Diagram & Panel Layout Installation with Auxiliary Supply 221332 1 High Voltage Metering - Labelling & Equipment Details Installation with Auxiliary Supply 221332 2 High Voltage Metering - Schematic Diagram & Wiring Diagram Installation with Check Metering 221333 1 High Voltage Metering - Panel Layout, Labelling & Equipment Details Installation with Check Metering 221333 2 High Voltage Metering - Schematic Diagram & Wiring Diagram Installation with Check Metering and Auxiliary Supply 221334 1 High Voltage Metering - Panel Layout, Labelling & Equipment Details Installation with Check Metering and Auxiliary Supply 221334 2 Earthing As stated in clauses 9.3.2 and 9.3.3 the VT or VTs secondary star point shall be connected to an earth stud in the marshalling box. Where no marshalling box is fitted the secondary star point shall be earthed in the metering panel. The star point is to be earthed at only one point in the installation as close as possible to the source. As stated in clause 9.4 CT non-polarities shall be commoned and connected to the earth stud in the marshalling box. Where no marshalling box is fitted the CT non-polarities shall be commoned and connected to earth stud in the metering panel. The CT non-polarities shall be earthed at only one point in the installation. The marshalling box enclosure/s, the metering panel enclosure/s and all metal components installed within the metering panel and marshalling box/es shall be earthed. The earth cable size for a marshalling box enclosure installed in a high voltage switchyard shall be of adequate size to handle the expected fault current specified for the yard. The same applies to the metering panel enclosure which is installed in close proximity to high voltage mains and apparatus, see Ausgrid’s document NS 222, Major Substation Design Layout for further detail. The metal components installed within the marshalling box and the metering panel shall be earthed with at least a 4mm2 cross sectional area conductor with a green/yellow sheath. 9.11 Fuse ratings All potential fuses should be installed to allow for cascading discrimination. Fuse sizes are to be as follows: NW000-S0141 Marshalling box – 10A Metering Panel – 4A Communications fuses – 2A UNCONTROLLED IF PRINTED Page 54 of 60 S0141 ES3 Metering Installation Requirements Part A 9.12 Amendment No 0 Labelling All equipment shall be numbered and labelled as per the appropriate drawing. The label type for all fuses and terminations shall be the engraved type and shall be adequately secured. All fuses and neutral links shall have a label on the base along with a label on the fuse/link holder. A label schedule with details of the metering panels labelling can be found in the appropriate drawing. A function table shall be attached to the rear of the metering panels access door or on the panel itself if an enclosure is not used. A function table should also be attached to the rear of the marshalling box/es access door. The function table shall indicate the function of each component and the fuse size where applicable. An example function table for the metering panel can be found below, it may be printed out, laminated and attached as required. In all instances the metering panel shall be clearly identified. This is achieved by the use of an engraved type label with the word “METERING”. This label shall have minimum 20mm high lettering and shall be adequately secured to the metering panel. If a marshalling box is used, it shall be clearly identified. This is achievable by the use of an engraved label with words describing the equipment installed within, the voltage level and the service that the equipment is installed on. Any marshalling box and/or metering panel/s installed outdoors and a weatherproof enclosure is used, these labels shall be UV rated and shall be secured to the outside of the enclosure lid, the label shall be secured to prevent the label falling off due to the effects of weather. The enclosure must retain its IP rating after the installation of any label. The metering panel shall be marked appropriately with the site address and the location of the VTs and CTs, if installed remote from the metering panel. If an auxiliary supply is used identified in clause 9.13, the location of the circuit protection shall also be marked on the metering panel. The following drawing of a HV metering panel function table can be used as a guide. Table 16 HV metering panel item functions NW000-S0141 UNCONTROLLED IF PRINTED Page 55 of 60 S0141 ES3 Metering Installation Requirements Part A 9.13 Amendment No 0 Auxiliary supply Whilst it is not a requirement to make provision for an auxiliary supply it may in some cases be of benefit to make a separate 110V AC supply available at the metering panel/s, this would allow the meter/s and communications device/s to be energised from a source independent of the VT allowing the metering and communications to remain energised at times when the VT is not in service. This is especially useful for standby supplies that may only be energised occasionally. For installations where this auxiliary supply is used it is a safety requirement to ensure that voltages of different levels do not exist at the meter/s. A two winding transformer with an output of 110V AC may be used to ensure this voltage segregation. If an auxiliary supply is to be used separate detailed drawings of this connection method. The drawings can be found as per clause 9.9 above. 9.14 Information required prior to electrification The following information is a summary of what is required before energising a HV metered installation. Proof that the type of metering installation complies with the National Electricity Rules (clause 9) CT and VT test reports have been submitted to Ausgrid (clause 9.1) Drawings detailing the metering information (clause 9.6) For metering installations with multiple metering points, a panel layout design shall be submitted to Ausgrid’s Field Operations office during the design stage of the installation for approval. (clause 9.9) 10.0 RETURNING OF METERING EQUIPMENT To avoid injury to Ausgrid staff, injury to others and damage, the following must be adhered to when returning Ausgrid metering assets: All equipment mounting screws must be removed. All residual cable must be removed from terminals. All equipment screws must be tightened (to avoid possible loss of screws in transit). All equipment that is removed from the meter board must be wet wiped with a damp rag to remove any surface dust immediately following the removal of the equipment. If the electrical board or any other part of the metering enclosure is suspected of containing asbestos, then the rags should be disposed of as asbestos-contaminated waste. If the electrical board is suspected of containing asbestos, then procedures, safety controls and personal protective equipment that are described in the procedure 'Safe Work Practice 5 Working on Electrical Mounting Boards Containing Asbestos' must be applied. Note: The procedure, 'Safe Work Practice 5 - Working on Electrical Mounting Boards Containing Asbestos' can be found in the document 'Work Cover NSW Code of Practice: How to manage and control asbestos in the workplace'. This document can be obtained from the Safe Work NSW website (catalogue number SW08285). 10.1 ASPs When returning metering equipment and associated devices (e.g. LCU) to an Ausgrid Field Operations depot, the ASP must ensure that the meters are separated into the appropriate mechanical and electronic return locations to allow for ease of sorting. In addition returned CTs must also be placed in the appropriately labelled crate. Only Ausgrid meters are to be returned to Ausgrid Field operations depots. ToU and Flat Rate metering equipment is to be returned by ASPs to a local Field Operations office as detailed in ES1 - Premises Connection Requirements. NW000-S0141 UNCONTROLLED IF PRINTED Page 56 of 60 S0141 ES3 Metering Installation Requirements Part A 10.2 Amendment No 0 MPBs AEMO accredited MPBs are to return all Ausgrid Type 1- 6 metering and any associated communications equipment to one of the locations below unless the MPB has a documented agreement with Ausgrid for an alternate method of disposal or return. All removed type 5 metering must be returned to one of the two locations below. Where the Ausgrid metering assets are to be returned to Ausgrid, this is to be completed within ten days of removal. Oatley Building 1 33 – 45 Judd Street Oatley, NSW 2223 Wallsend Building 3 78 Abbott Street Wallsend, NSW 2287 11.0 RECORDKEEPING The table below identifies the types of records relating to the process, their storage location and retention period. Table 17 – Recordkeeping Type of Record Storage Location Retention Period* Approved copy of the network standard BMS Network sub process Standard – Company Unlimited Draft Copies of the network standard during amendment/creation HPRM Work Folder for Network Standards (HPRM ref. 2014/21250/207) Unlimited Working documents (emails, memos, impact assessment reports, etc.) HPRM Work Folder for Network Standards (HPRM ref. 2014/21250/207) Unlimited * The following retention periods are subject to change eg if the records are required for legal matters or legislative changes. Before disposal, retention periods should be checked and authorised by the Records Manager. 12.0 AUTHORITIES AND RESPONSIBILITIES For this network standard the authorities and responsibilities of Ausgrid employees and managers in relation to content, management and document control of this network standard can be obtained from the Company Procedure (Network) – Production / Review of Engineering Technical Documents within BMS. The responsibilities of persons for the design or construction work detailed in this network standard are identified throughout this standard in the context of the requirements to which they apply. 13.0 DOCUMENT CONTROL Content Coordinator : Network and Customer Technologies Manager Distribution Coordinator : Engineering Information and Services Manager NW000-S0141 UNCONTROLLED IF PRINTED Page 57 of 60 S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Annexure A – NOMW form meter types 1 - 4 Please complete and email this form to Ausgrid on [email protected] within 5 working days of completion of metering installation, replacement or removal relating to Meter Types 1 to 4 in Ausgrid’s distribution area. A notification period of 2 days is required where ASP2 works are conducted in conjunction with the Type 1-4 meter installation. NOTE: The standard NOSW form should be used for all Type 5 & 6 meter metering work (See ES4), except when removed in conjunction with Type 1-4 metering works, when this form shall be used. Section A – Customer and Site Location NMI Customer Name Address Postcode Meter Location New Interested Party Details Meter Provider Meter Data Provider New Responsible Person Retailer Section B – Connection and Site Details Site Connection Arrangements Reason for Metering Change Whole Current Residential New Meter Installation Permanent Disconnection / Removal of Meter Current Transformer Commercial Alteration to Metering Meter Left Energised High Voltage Generation Replace Metering Other Section C – Metering Equipment Details Status* (R, E, I) External Meter Property Number (Must align with number in NEM12 file) #of Phases Readings Meter K Generation Net Gross Load Type (e.g. Controlled load, Solar, General, Domestic, etc.) Ausgrid Load Control Device Status* (R, E, I) External Property Number Setting *Status: R= Removed, I= Installed, E= Existing. Measurement Transformer Details (where applicable) Voltage Transformer Current Transformer R Serial Number W B Accuracy Class Ratio Primary Voltage (Line-Line) Current Secondary Voltage (Line-Line) Current Comments: ______________________________________________________________________________________ ______________________________________________________________________________________ Section D – Certification by Installer I notify that the completed works described in this notice complies with the National Electricity Rules, associated procedures, Code for the safe installation of direct connected whole current electricity metering in NSW, and the Service and Installation Rules of NSW as applicable as follows: AEMO Metering Provider Name: ________________ NW000-S0141 ________ Date: ________ AEMO MP Contact Details:______________________________ UNCONTROLLED IF PRINTED Page 58 of 60 V 3.2 July 2016 Metering Installed and sealed by: _________________________ Sealing Pliers No: S0141 ES3 Metering Installation Requirements Part A Amendment No 0 Annexure B – Obsolete zellweger ZE22/3 load control relays B1 General A small number of Zellweger ZE22/3 load control relays presently installed on customer’s installations within Ausgrid's distribution area may pose a personal safety risk if not handled correctly. ZE22/3 relays contain a glass tube that contains a low-level radioactive material. Whilst the glass tube remains intact, the radioactive material is not considered hazardous to people. As a precautionary measure, ONLY Ausgrid staff who are specially trained and equipped to safely handle the ZE22/3 relays are permitted to remove these devices from customer’s installations e.g. due to a building demolition. All other service providers, MPBs and personnel must contact a local Ausgrid Metering Operations representative (see contact details below) to arrange for this work to be carried out by the specially trained and equipped Ausgrid staff. Note: Existing ZE22/3 relays are not permitted to be relocated on a customer’s installation (refer to clause 2.3.10 of this document). The ZE22/3 relay has a ‘lower terminal cover’ and an ‘upper relay cover’. Removal of the ‘lower terminal cover’ by service providers (Level 2, Category 4 – Metering or MPBs) whilst the ZE22/3 relay is in situ, is not considered to expose personnel to safety risks due to the radioactive material. However, the ‘upper relay cover’ must NOT be removed, as this could expose personnel to the risks associated with the radioactive material. Ausgrid is currently carrying out the bulk replacement of all ZE22/3 relays installed throughout Ausgrid’s distribution area. Any return meter crates containing ZE22/3 relays should NOT be transported, as there are strict rules on the transportation of hazardous substances. Contact the local Field Operations representative (see contact details below) to arrange for the ZE22/3 relays to be collected. If anyone should inadvertently come into contact with the glass tube contained within a ZE22/3 relay, they should immediately wash their hands/skin thoroughly with soap and water. If the glass tube is broken and a person comes into contact with its contents, they should immediately seek professional medical advice as a precautionary measure. NW000-S0141 UNCONTROLLED IF PRINTED Page 59 of 60 S0141 ES3 Metering Installation Requirements Part A B2 Amendment No 0 Local Ausgrid representatives Contact the local Ausgrid representative (Metering Operations field team leader) in the appropriate Field Operations region where an existing ZE22/3 relay (installed on a customer’s installation) is required to be removed. Contact should be made well in advance to ensure the timely completion of the job by Ausgrid. Table 18 Local Ausgrid Contacts Field Operations Region (where the ZE22/3 relay is installed) Contact Telephone Number (Ausgrid Representative) Hunter (02) 4910 0206 Central Coast (02) 4399 8078 Sydney North (02) 9269 7351 Sydney South (02) 9663 9388 The Field Operations representative will request the following information: (a) Name and contact telephone number of the service provider or electrical contractor making the request (b) Site address where the ZE22/3 relay is installed (c) General condition of the relay (d) Why the relay is being removed e.g. building demolition (e) Number of relays to be removed (f) The number of poles on the relay, the signal frequency (492, 750 or 1050 Hz) and the current tariff of each pole, (where the relay is being replaced by Ausgrid (as contestable work), rather than just removed) (g) Level of urgency of the job (when the job is required to be completed). NW000-S0141 UNCONTROLLED IF PRINTED Page 60 of 60
