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

Standard No.

GB/T 7674-2020

Language

Chinese, Available in English version

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

Latest

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 11017.1 Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 110 kV(U<下标m>=126 kV).Part 1:Test methods and requirements
• 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 16927.1 High-voltage test techniques.Part 1:General definitions and test requirements
• 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 22078.1 Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 500kV(Um=550kV).Part 1:Power cable systems-cables with cross-linked polyethylene insulation and their acccessories for rated voltage of 500kV(Um=550kV).Test
• 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 2423.17-2008 Environmental testing for electric and electronic products.Part 2:Test method.Test Ka:Salt mist
• GB/T 26218.1-2010 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions.Part 1:Definitions,information and general principles
• GB/T 26218.2-2010 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions.Part 2:Ceramic and glass insulators for a.c.systems
• GB/T 26218.3-2011 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions.Part 3:Composite insulators for a.c.systems
• GB/T 3785.1 Electroacoustics—Sound level meters—Part 1: Specifications*， 2023-05-23 Update
• GB/T 3785.2 Electroacoustics—Sound level meters—Part 2: Pattern evaluation tests*， 2023-05-23 Update
• GB/T 4109-2008 Insulated bushings for alternating voltages above 1000V
• GB/T 7354 High-voltage test techniques—Partial discharge measurements
• GB/T 7674-2020 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above
• GB/T 8905 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
• ISO 6988:1985 Metallic and other non organic coatings; Sulfur dioxide test with general condensation of moisture

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