This standard specifies the operating conditions, technical requirements, inspection rules, test methods and packaging and transport of metal-oxide surge arresters without gaps for 1,000 kV a.c. system.
This standard is applicable to porcelain-housed metal-oxide surge arresters without gaps for power stations (referred to as "surge arresters") and gas-insulated metal-enclosed metal-oxide surge arresters without gaps (referred to as "GIS arresters") designed to limit the overvoltage in 1,000 kV a.c. systems.
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/T 191 Packaging - Pictorial marking for handling of goods
GB/T 7354 Partial discharge measurements
GB/T 7674 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above
GB/T 8905 The guide for management and measuring SF6 gas in electrical equipment
GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards
GB/T 11023 Test guide of SF6 gas tightness for high-voltage switchgear
GB/T 11032-2010 Metal-oxide surge arresters without gaps for A.C. systems
GB/T 12022 Industrial sulfur hexafluoride
GB/T 13540-1992 Anti-seismic characteristic test for high-voltage switchgear
GB/T 16927.1 High-voltage test techniques - Part 1: General definitions and test requirements
GB/T 26218.1 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 1: Definitions, information and general principles
GB/T 26218.2 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 2: Ceramic and glass insulators for a. c. systems
GB 50150 Standard for hand-over test of electric equipment - electric equipment installation engineering
GB 50260-2013 Code for seismic design of electrical installations
JB/T 10492 Monitoring devices for metal-oxide surge arresters
IEC 60099-4:2014 Metal-oxide surge arresters without gaps for a.c. systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 11032-2010, GB/T 11022-2011 and the following apply. For the convenience of application, some terms and definitions given in GB/T 11032-2010 and GB/T 11022-2011 are listed repeatedly as follows.
3.1
housing and sheds
3.1.1
housing
external insulating part of an surge arrester, which provides the necessary creepage distance and protects the internal parts from the environment
Note: housing may consist of several parts providing mechanical strength and protection for the internal parts against the environment.
[GB/T 11032-2010, definition in 3.46.1]
3.1.2
shed
insulating part projecting from the housing; it is intended to increase the creepage distance
[GB/T 11032-2010, definition in 3.46.2]
3.2
porcelain-housed surge arrester
surge arrester which uses porcelain as housing material and is provided with fittings and sealing systems
[GB/T 11032-2010, definition in 3.59]
3.3
bending moment
horizontal force acting on the surge arrester housing multiplied by the vertical distance between the mounting base (lower end of lower flange) of the surge arrester housing and the point of application of the force
[GB/T 11032-2010, definition in 3.61]
3.4
terminal line force
GB/T 24845-2018 The following standards are cited：
