GB/T 7674-2020
Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above

Standard No.

GB/T 7674-2020

Language

Chinese

Release Date

2020

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Lastest

GB/T 7674-2020

Replace

GB/T 7674-2008

Scope

This standard specifies the terms and definitions, normal and special service conditions, ratings, design and structure, type test, factory test and selection guidelines for gas-insulated metal-enclosed switchgear. This standard applies to indoor and outdoor installations of gas-insulated metal-enclosed switchgear (hereinafter referred to as "GIS" or "switchgear") with a rated voltage of 72.5 kV and above and a rated frequency of 50 Hz, the insulation of which is at least partially obtained by insulating gas rather than air at atmospheric pressure. The gas-insulated metal-enclosed switchgear covered by this standard consists of individual elements which can be connected directly together and which can only be operated in this way. As needed, this standard completes and supplements the relevant standards applicable to each individual component that constitutes a GIS.

GB/T 7674-2020 Referenced Document

• GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards
• GB/T 11023 Test method of SF6 gas tightness for high—voltage switchgear
• GB/T 12022 Industrial sulfur hexafluoride
• GB/T 13540 Seismic qualification for high-voltage switchgear and controlgear
• GB/T 13540-2009 Seismic qualification for high-voltage switchgear and controlgear
• GB/T 1985-2014 High-voltage alternating-current disconnectors and earthing switches
• GB/T 21429 Composite insulators.Hollow insulators for use in outdoor and indoor electrical equipment.Definitions,test methods,acceptance criteria and design recommendations
• GB/T 21429-2008 Composite insulators.Hollow insulators for use in outdoor and indoor electrical equipment.Definitions,test methods,acceptance criteria and design recommendations
• GB/T 22381-2017 Cable connections between gas-insulated metal-enclosed switchgear for rated voltages equal to and above 72.5kV and fluid-filled and extruded insulation power cables—Fluid-filled and dry type cable-terminations
• GB/T 22382-2017 Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above
• GB/T 23752 Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000V
• GB/T 23752-2009 Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000V
• GB/T 3785 Electric,sonic properties and measuring methods for sound level meters
• GB/T 4109-2008 Insulated bushings for alternating voltages above 1000V
• GB/T 7354 High-voltage test techniques—Partial discharge measurements
• GB/T 7354-2018 High-voltage test techniques—Partial discharge measurements
• GB/T 8905 The guide for management and measuring SF<下标6> gas in electrical equipment
• GB/T 8905-2012 The guide for management and measuring SF<下标6> gas in electrical equipment
• GB/T 9789 Metallic and other non-organic coatings.Sulfur dioxide test with general condensation of moisture
• GB/T 9789-2008 Metallic and other non-organic coatings.Sulfur dioxide test with general condensation of moisture
• IEC 60141 Test on oil-filled and gas-pressure cables and their accessories; part 4: oil-impregnated paper-insulated high pressure oil-filled pipe-type cables and accessories for alternating voltages up to and including 400 kV; amendment 1 to IEC 60141-4:1980
• IEC 62271-102:2001 High-voltage switchgear and controlgear - Part 102: -Alternating current disconnectors and earthing switches
• IEC 62271-2:2003 High-voltage switchgear and controlgear - Part 2: Seismic qualification for rated voltages of 72,5 kV and above

GB/T 7674-2020 history

• 2020 GB/T 7674-2020 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above
• 2008 GB 7674-2008 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above
• 1997 GB 7674-1997 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above