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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Where this standard is issued as a controlled document replacing an earlier edition, remove and destroy the superseded document.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
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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
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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
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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
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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
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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
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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
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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.
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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
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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
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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.
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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.
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Table 4 Consumption only metering configuration
Table 5 Net embedded metering configuration
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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.
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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.
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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:
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(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.
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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.
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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.
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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
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Figure 2 B1 Single phase element meter
Figure 3 E2/E2c single phase dual element electronic meter with controlled load
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Figure 4 B3 three phase single element meter
Figure 5 E3/E3c three phase single element electronic meter
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Figure 6 E3/E3c two phase single element electronic meter
Figure 7 Load control device wiring diagram
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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.
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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.
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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
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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.
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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.
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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
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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.
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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.
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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
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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
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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
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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.
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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.
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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
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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.
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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.
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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]
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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.
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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.
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(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.
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
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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
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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
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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
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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
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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
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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
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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:______________________________
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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
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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
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