IEEE C37.123-1996 pdf download IEEE Guide to Specifications for Gas- Insulated, Electric Power Substation Equipment
1. Overview
1.1 Scope
This guide covers the cchnical requirenients [or the design. fabrication, testing, installation, and in-serviceperformance of a gas-insulaled suhstation (GIS)
The supplier should furnish all equipment and matcrial-nccessary to provide the complete GIS as shown onthe functional one-line diagram, which may consis of circuit breakers (CB), disconnect switches (DS).maintenance ground switches (MGS), fast-acting ground switches (FGS), voltage transformers (VT), currenttransformers (CT), SF-to-air bushings, SF-to-cable termination, buses, cable termination enclosures, trans-former or reactor bushing enclosures, enclosed surge arresters, elbows, bellows, controls. cables for controlprotection and metering, density monitors, platforms, special tools, and SF gas for initial filling. All equipment and material shall be prefabricated, factory assembled, tested, and shipped in the largest practicalassemblies.
Assembled equipment should be capable of withstanding electrical, mechanical, and thermal ratings of thespecified system. All joints and connections should be able to withstand the forces of expansion, vibrationcontraction, and specified seismic requirements without deformation, malfunction, or leakage, Equipmentshall be capable of withstanding the specified outdoor or indoor environment
Optimized arrangements, shown in annex A, are required to reduce installation time, provide case of operation, minimize maintenance and repair prices, and facilitate future additions as described in the specifications. The user should identify space or area limitations for the GlS, driveway access, and any overheadclearance restrictions. Final arrangement shall be as mutually agreed to between the user and the supplier.
Field assembly maintenance, cost of operation, and capitalized cost of maintenance during equipment lifewill be considered in bid evaluations. To elicit a complete and uniform response from each bidder, proposaldata is provided in clause 7.
2. References
The following publications shall be used in conjunction with this guide:
ASTM D2472-1992, Specification for Sulfur Hexafluoride.”IEC 859:1986, Cable Connections for Gas-insulated Metal-Enclosed Switchgear for Rated Voltages of72.5 kV and above.2
IEC 1129:1992,Alternating Current Earthing Switches–Induced Current Switching.IEC 1639: 1996,Direct Connections Between Power Transformers and Gas-Insulated Metal-EnclosedSwitchgear for Rated Voltages of 72.5 kV and Above.
IEEE Std 100-1996, The IEEE Standard Dictionary of Electrical and Electronic Terms .
IEEE Std 1300-1996, Guide for Cable Connections for Gas-Insulated Substations.IEEE Std C37.09-1979 (Reaff 1988), IEEE Standard Test Procedure for AC High-Voltage Circuit BreakersRated on a Symmetrical Current Basis (ANSI).
IEEE Std C37.122-1993, IEEE Standard for Gas-Insulated Substations (ANSI.
IEEE Std C57.13-1993, IEEE Standard Requirements for Instrument Transformers (ANSI).
IEEE Std C62.11-1993,IEEE Standard for Metal-Oxide Surge Arrestors for AC Power Circuits (ANSI)NEMA CC 1-1993 Electric Power Connectors for Substations
NFPA 70-1996, National Electrical Code@ (NECO)6
In the event of conflict between the referenced standards, the drawings of the user, and specified requirements, or between standards issued by different authorities, the more stringent requirements are to apply.
3. Definitions
The following definitions are applicable only to the subjects treated in this guide
3.1 catastrophic faiure: A failure of any portion of the GIS due to internal or external faults that results insufficient damage to that portion of the GIS that it cannot be returned to service without major repairs.
3.2 clearly discernable: Capable of being noticed easily without close inspection.
3.3 retransmit contacts: Auxiliary contacts on an annunciator that provide an output to a remote device toindicate that the annunciator has been actuated.
IEEE C37.123-1996 pdf download
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