* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 3. Corrosive atmosphere features
Electrification wikipedia , lookup
History of electric power transmission wikipedia , lookup
Electrical engineering wikipedia , lookup
Power engineering wikipedia , lookup
Three-phase electric power wikipedia , lookup
Electronic engineering wikipedia , lookup
Stray voltage wikipedia , lookup
Electrician wikipedia , lookup
Ground (electricity) wikipedia , lookup
Portable appliance testing wikipedia , lookup
Surge protector wikipedia , lookup
Electrical substation wikipedia , lookup
Rectiverter wikipedia , lookup
Telecommunications engineering wikipedia , lookup
Distribution management system wikipedia , lookup
Alternating current wikipedia , lookup
Mains electricity wikipedia , lookup
Residual-current device wikipedia , lookup
Home wiring wikipedia , lookup
Earthing system wikipedia , lookup
Electrical wiring wikipedia , lookup
Specification for Tender 565323971 General Specifications for High-Power Distribution and Motor Control LV Switchboard 1. Requirements for the design of an installation system 2. Seismic features 3. Corrosive atmosphere features 4. Internal arc features 5. Marine features 6. Project-specific requirements Last update : 2017-06-29 -1- Specification for Tender 565323971 Table of contents: 1. Requirements for the design of an installation system ………………………………......... p. 3 1.1 General……………………………………………………………………………………….. p. 3 1.2 Enclosures……………………………………………………………………........................ p. 3 1.3 Busbars………………………………………………………………………......................... p. 4 1.4 Functional units ……………………………………………………………………............... p. 4 1.5 Installation, maintenance and upgradeability …………………………….............................. p. 4 2. Seismic features …………………………………………………………………................... p. 5 3. Corrosive atmosphere features ………………………………….......................................... p. 5 4. Internal arc features ……………………………………………………………………..... .. p. 5 5. Marine features ………………………………………………………………...................... p. 5 6. Project-specific requirements …………………………………………………………........ p. 5 6.1 Environmental conditions …………………………………………………………….......... p. 5 6.2 Network electrical data ……………………………………………………………............... p. 6 6.3 Switchboard electrical data ……………………………………………………..................... p. 6 6.4 Connections………………………………………………..................................................... p. 6 6.5 Cross-section of auxiliary cables ……………………………………………….................... p. 6 6.6 Switchgear assembly …………………………………………………………….................. p.7 Last update : 2017-06-29 -2- Specification for Tender 565323971 1. Requirements for the design of an installation system 1.1 General The LV switchboard(s) will conform to IEC 60439-1 and be subjected to the 10 tests defined by this international switchboard design standard. Seven type tests performed by the manufacturer: No. 1 – temperature-rise limits No. 2 – dielectric properties No. 3 – short-circuit withstand strength No. 4 – electrical continuity of the protective circuit No. 5 – clearance and creepage distances No. 6 – mechanical operation No. 7 – degree of protection Three separate tests performed by the supplier: No. 8 – wiring, electrical operation No. 9 – insulation No. 10 – protective measures The batch contractor must provide the certificate numbers or the certificates of conformity for the seven type tests performed by the manufacturer, in addition to a copy of the first pages of these test certificates. A conformity sheet signed by the installer confirming that these three routine tests have been carried out will be provided with the switchboard. It will satisfy EMC conformity requirements. It will be designed for use in a type A environment in accordance with IEC 60439-1. In particular, the design of the functional volumes will ensure that the sensitive circuits are isolated from the power conductors. To guarantee consistency of installed equipments, the switchboard system and the switchgear will be supplied by the same manufacturer. 1.2 Enclosures To ensure the reliability, the influence of the ambient temperature and switchboard IP will be taken into account in the design of the switchboard. Where necessary, the switchgear assembly will be derated. The manufacturer will use special software or tables to justify such derating. The switchgear design will include a degree of protection to IP31, 42 or 54 as specified by IEC 60529. In the event of the doors of the functional units being open in the test position or removed, its degree of protection will be IP2X or IPXXB. The degree of mechanical protection will be IK10. Last update : 2017-06-29 -3- Specification for Tender 565323971 1.3 Busbars To facilitate the connections, the main busbar will be installed at the top of the columns, with the design allowing for cables or busbar trunking systems to be connected via the top, bottom, front or back, without changing the position of the busbar or the height of the switchboard. Upgrading will be facilitated by the use of a main busbar with a constant cross-section consisting of 10 mm x 40 mm rectangular copper bars varying in number according to the rated current. The quality of the copper will be Cu-ETP R240. Harmful thermal effects and electromagnetic radiations will be minimized by arranging the different phases in a rectangular pattern and the neutral and phase busbars running in the same functional volume. The main busbar fishplating will be made using preinstalled sliding fishplates arranged to enable all the operations to be performed without hindrance from the power cables. For maintenance purposes, it will be possible to remove a column from the centre of the switchboard and reinsert it without affecting the adjacent columns. To make it easier to upgrade the facility, the distribution busbar will be installed in an IP2x or IPxxb compartment and allow functional units with an output of up to 630 A to be added without interrupting the power supply on these busbars by connecting them with plugs instead of screws. The distribution busbar will consist of 10 mm thick rectangular copper bars that will vary in width (40 to 120 mm), depending on the rated current. The quality of the copper will be Cu-ETP R240. 1.4 Functional units To make them easier to operate and maintain, all functional units of the same type and rating will be interchangeable, unless a foolproofing system is installed. To facilitate upgrading, it will be possible to add a functional distribution and motor control unit of up to 630 A in the same column, without interrupting the power supply. To satisfy operating and maintenance requirements, the installation system will accept FFF, WFD, WFW and WWW functional units. The system used to connect the functional units must not cause any wear and tear on the distribution busbars during plugging-in/drawing out. In the case of withdrawable functional units, changing from one position to another must be mechanically latched. The position of the drawers should be indicated by an indicator and also by the position of the front plate of the drawer. The spare unit will not be equipped, as the switchboard will be designed to allow it to be upgraded easily and therefore does not require spare feeders to be pre-fitted. 1.5 Installation, maintenance and upgradeability The panelbuider will be located near enough to be able to supply the personnel and parts required for any operation. The manufacturer will provide appropriate procedures and, if applicable, logistical assistance. The manufacturer undertakes to provide spare parts with a service life of 10 years from the end-of-marketing date. Last update : 2017-06-29 -4- Specification for Tender 565323971 2. Seismic features If the switchboard is to be used in a seismic area, the supplier will be informed of the specific acceleration levels required. The supplier will determine the switchboard configuration that is appropriate to the stresses involved. The test certificates will be supplied with the switchboard and refer to IEC, IBC or Nuclear HN20E53 standards. 3. Corrosive atmosphere features The supplier will be informed of any pollutants (e.g. SO2, H2S) that may be present on the site and must provide appropriate coating for the conductors (busbars, connections) and metal elements (mechanisms, frames, casing).The supplier will specify the deratings to be made, depending on the types of coatings used on the conductive parts. The surface of the copper parts will be treated to guard against the effects of corrosion. The bolted connections will be coated with 30 microns of tin. All friction contact connections will be coated with 20 microns of nickel, to prevent wear and tear due to friction. The level of protection of the switchboard will be in conformance with IEC 721-3-3. 4. Internal arc features The switchboard will be designed to minimize the risks associated with the propagation of an "internal arcing" fault. It will be in conformance with the requirements of the IEC1641 technical report and AS3439-1 relative to the protection of operators and equipment. 5. Marine features The switchboard will conform to the DNV (DET Norsk Veritas) Marine specifications. Vibration withstand test certificates will be provided. The switchboard will be fitted with the safety accessories recommended for embedded devices and will have a degree of protection of at least IP22. It will satisfy the main standards relative to electrical installations in ships (IEC 92 series). The derating tables to be applied will be those intended for an ambient temperature of 45°C. 6. Project-specific requirements 6.1 Environmental conditions Altitude: =< 2000 m > 2000 m Average ambient temperature around the switchboard over a period of 24 h: Relative humidity: 80% at 35°C Column heating: with without Climatic environment: T1: temperate climate T2: all climates T3: corrosive atmosphere Last update : 2017-06-29 35°C -5- Specification for Tender 565323971 6.2 Network electrical data Rated voltage: Rated power: Rated current: Rated frequency: Number of sources: Short-circuit current: V KVA A Hz parallel yes/no KA RMS 1S Neutral system: directly earthed neutral isolated neutral connection to neutral TT IT TNC TNS distributed neutral non-distributed neutral 6.3 Switchboard electrical data Rated current In of the main busbar: Rated short-circuit current Icw : 50 KA 85 KA 100 KA Switchboard mechanical data: Degree of protection IP: 22 31 42 54 Degree of protection against mechanical impact Ik: 10 Service rating IS (111, 211, 223, 231, 232, 331, 332) Incomer = Or type of FU electrical connection (F, D, W): Incomer = Forms: 2b 3b 4b Feeder = Feeder = 6.4 Connections Incomer connections: Feeder connections: top bottom top bottom Access to the connections: Front Rear 6.5 Cross-section of auxiliary cables Black wire without isolated end-piece 1000 V and cross-section: 1mm² for control and signalling circuits 1.5 mm² for voltage circuits 2.5 mm² for current circuits Last update : 2017-06-29 -6- Specification for Tender 565323971 6.6 Switchgear assembly Number and rating of incomers: Number and rating of feeders: Or refer to the single-line diagram ref.: Last update : 2017-06-29 -7-