1.1 Scope This standard applies to AC switchgear and control equipment installed indoors and outdoors in power systems with voltages of 3kV and above and frequencies of 50 Hz and below. Unless otherwise specified in product standards related to specific types of switchgear and control equipment, this standard applies to all high-voltage switchgear and control equipment. Note: In order to facilitate the use of this standard, the voltage range of high-voltage switchgear in general refers to the rated voltage of 3.6 kV and above. In practical applications, the rated voltage range of medium voltage switchgear is usually 3.6 kV~63 kV; The rated voltage range of high-voltage switchgear is 72.5kV~252kV; The rated voltage range of ultra-high voltage switchgear is 363kV~800kV; The rated voltage range of ultra-high voltage switchgear is 1100 kV and above. 1.2 Normative References The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 156-2007 Standard Voltage (IEC 60038:2002. MOD) GB 311.1-1997 Insulation Coordination for High Voltage Transmission and Transformation Equipment (neq IEC 60071-1; 1993) GB/T 311.2 Insulation Coordination, Part 2: Guidelines for the Use of Insulation Coordination for High Voltage Transmission and Transformation Equipment (IEC 60071-2:1996, MOD) GB 755-2008 Rating and Performance of Rotating Electrical Machines (IEC 60034-1:2004, DT) GB/T 762-2002 Standard Current Class (IEC 60059:1999, MOD) GB 2099.1-2008 Plugs and Sockets for Household and Similar Purposes - Part 1: General Requirements (IEC 60884-1:2006. MOD) GB/T 2423 Series, Environmental Testing of Electrical and Electronic Products, Part 2 (IEC 60068-2 (all parts), IDT) GB 2536-1990 Transformer Oil (neq 1EC 60296: 1982) GB/T 2900.13-2008 Electrotechnical Terminology Reliability and Service Quality (IEC 60050-191:1990, IDT) GB/T 2900.17-2009 Electrotechnical Terminology Measurement Relay GB/T 2900.18-2008 Electrotechnical Terminology Low Voltage Electrical Appliances GB/T 2900.19-1994 Electrotechnical Terminology High Voltage Testing Technology and Insulation Coordination (neq IEC 60071-1:1993) GB/T 2900.20-1994 Electrotechnical Terminology, High Voltage Switchgear (neq IEC 60050-441:1984) GB/T 2900.33-2004 Electrotechnical Terminology - Power Electronic Technology (IEC 60050-551:1998, IDT) GB/T 2900.36-2003 Electrotechnical Terminology - Electric Traction (IEC 60050-811:1991, MOD) GB/T 2900.56-2008 Electrotechnical Terminology, Control Technology (IEC 60050-351: 2006, 1DT) GB/T 2900.59-2008 Electrotechnical Terminology - Power Generation, Transmission and Distribution: Substations (IEC 60050-605; 1983, MOD) GB/T 2900.71-2008 Electrotechnical Terminology - Electrical Equipment (IEC 60050-826; 2004, IDT) GB 3906-2006 3.6 kV to 40.5kV AC Metal Enclosed Switchgear and Control Equipment (IEC 62271-200:2003, MOD) GB/T 4025-2003 Basic and Safety Rules for Human-Machine Interface Markings - Coding Rules for Indicators and Operators (IEC 60073-1996, 1DT)
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