1 Scope
This standard specifies the terms and definitions, service environment conditions, rated values, technical requirements, type test, routine test, special test, field test, etc. of high-voltage direct current transfer switches.
This standard is applicable to DC transfer switches for DC transmission at a voltage level of ±800 kV and below, including metallic return transfer breaker (MRTB), earth return transfer breaker (ERTB), neutral bus switch (NBS) and neutral bus grounding switch (NBGS).
This standard is also applicable to the operating mechanism and auxiliary equipment of these transfer switches.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 1094.1-1996 Power transformers - Part 1: General (IEC 60076-1:1993, EQV)
GB 1984-2003 High-voltage alternating-current circuit-breakers (IEC 62271-100:2001, MOD)
GB/T 2900.20-1994 Electrotechnical terminology - High-voltage switchgear (IEC 60050 (441), IEC 60056, etc., NEQ)
GB/T 5273-1985 Terminals for transformers, high-voltage apparatus and bushings (IEC 60518:1975, NEQ)
GB/T 7354-2003 Partial discharge measurements (IEC 60270:2000, IDT)
GB 10229-1988 Reactors (IEC 60289:1987, EQV)
GB/T 11022-1999 Common specifications for high-voltage switchgear and controlgear standards (IEC 60694:1996, MOD)
GB/T 11024.1-2001 Shunt capacitors for a.c. power systems having a rated voltage above 1 kV - Part 1: General - Performance, testing and rating - Safety requirements - Guide for installation and operation (IEC 60871-1:1997, EQV)
GB 11032-2000 Metal oxide surge arresters without gaps for a. c. systems (IEC 60099-4:1991, EQV)
GB/T 12022-2006 Sulphur hexafluoride for industrial use (IEC 376:1971, IEC 376A: 1973, IEC 376B:1974, MOD)
GB/T 13498-2007 Terminology for high-voltage direct current (HVDC) transmission (IEC 60633:1998, IDT)
GB/T 13540 Seismic qualification for high-voltage switchgear and controlgear (GB/T 13540-2009, IEC 62271-2:2003, MOD)
GB/T 16927.1-1997 High-voltage test techniques - Part 1: General test requirements (IEC 60060-1:1989, EQV)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.20, GB 1984 and GB/T 13498, as well as the following, apply.
3.1
DC transfer switches
3.1.1
DC transfer switch
switchgear for transferring DC operating current in HVDC transmission system from one operating return to another
3.1.2
active DC transfer switch
DC transfer switch with charging device
3.1.3
passive DC transfer switch
DC transfer switch without charging device
3.1.4
metallic return transfer breaker (MRTB)
switchgear for transferring DC current from the earth return path to the metallic return path, as shown in Figure 1
[GB/T 13498-2007, definition 9.12]
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Normal and special service conditions
5 Rated values
6 Technical requirements
7 Tests
8 Rules for transportation, storage, installation, operation and maintenance
9 Safety
Annex A (Informative) Overload current of DC system
Annex B (Informative) Guide for selection of DC transfer switches
Annex C (Informative) Test requirements for sub-equipment of DC transfer switches
