GB/T 3906-2020 PDF English
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Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV
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GB/T 3906-2020: Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.130.10
K 43
Replacing GB/T 3906-2006
Alternating-current metal-enclosed switchgear and
controlgear for rated voltages above 3.6 kV and up to and
including 40.5 kV
(IEC 62271-200.2011, High-voltage switchgear and controlgear - Part 200.AC metal-
enclosed switchgear and controlgear for rated voltages above 1 kV and up to and
including 52 kV, MOD)
Issued on. MARCH 31, 2020
Implemented on. OCTOBER 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 6
1 Scope... 12
2 Normative references... 13
3 Terms and definitions... 14
4 Normal and special conditions of use... 25
5 Ratings... 25
5.1 Overview... 25
5.2 Rated voltage (Ur)... 26
5.3 Rated insulation level... 26
5.4 Rated frequency (fr)... 26
5.5 Rated current and temperature rise... 26
5.6 Rated short-time withstand current... 27
5.7 Rated peak withstand current... 27
5.8 Rated short circuit duration... 28
5.9 Rated power supply voltage of closing and opening devices and auxiliary and control
circuits (Ua)... 28
5.10 Rated power frequency of closing and opening devices and auxiliary and control
circuits... 28
5.11 Rated pressure of the compressed air source of the controllable pressure system... 28
5.12 Rated charging levels for insulation and/or operation... 28
5.101 Ratings of internal arc class (IAC)... 29
5.102 Rated cable test voltage... 30
6 Design and structure... 31
6.1 Overview... 31
6.2 Requirements for liquids in switchgear and controlgear... 32
6.3 Requirements for gases in switchgear and controlgear... 32
6.4 Requirements for the main circuits of switchgear and controlgear to use solid-
insulation embedded components... 32
6.5 Earthing... 32
6.6 Auxiliary equipment and controlgear... 34
6.7 Power operation... 34
6.8 Energy storage operation... 34
6.9 Operations that do not rely on human labor... 34
6.10 Operation of trip unit... 35
6.11 Low-pressure lockout, high-pressure lockout, monitoring devices... 35
6.12 Nameplate... 35
6.13 Interlocking device... 37
6.14 Position indication... 38
6.15 Degree of protection of enclosure... 38
6.16 Creepage distance of outdoor insulators... 39
6.17 Gas and vacuum sealing... 39
6.18 Liquid sealing... 39
6.19 Fire (flammability)... 39
6.20 Electromagnetic compatibility (EMC)... 39
6.21 X-ray emission... 39
6.22 Corrosion... 39
6.101 Internal arc fault... 39
6.102 Enclosure... 40
6.103 High-pressure compartment... 43
6.104 Removable components... 47
6.105 Provisions for cable insulation testing... 47
7 Type test... 48
7.1 General... 48
7.2 Insulation test... 50
7.3 Radio interference voltage (r.i.v.) test... 56
7.4 Measurement of circuit resistance... 56
7.5 Temperature rise test... 56
7.6 Short-time withstand current and peak withstand current tests... 57
7.7 Verification of degree of protection... 60
7.8 Sealing test... 60
7.9 Electromagnetic compatibility test (EMC)... 60
7.10 Additional tests of auxiliary and control circuits... 60
7.11 X-ray test procedures for vacuum arc extinguish chamber... 61
7.101 Verification of making and breaking capabilities... 61
7.102 Mechanical operation test... 64
7.103 Pressure resistance test and gas state measurement of gas-filled compartments... 66
7.104 Verification tests for personal protection against hazardous electrical effects... 67
7.105 Weather protection test... 68
7.106 Internal arc test... 68
7.107 Performance verification test of metal-enclosed switchgear whose main components
in the main circuit adopt solid-insulation embedded components... 73
8 Exit-factory test... 75
8.1 Overview... 75
8.2 Insulation test of main circuit... 76
8.3 Testing of auxiliary and control circuits... 76
8.4 Measurement of main circuit resistance... 76
8.5 Sealing test... 77
8.6 Design inspection and appearance inspection... 77
8.101 Partial discharge measurement... 77
8.102 Mechanical operation test... 77
8.103 Pressure test of gas-filled compartments... 78
8.104 Testing of electrical, pneumatic, hydraulic auxiliary devices... 78
8.105 Testing after on-site installation... 78
8.106 Fluid state measurement after on-site fluid filling... 79
9 Guidelines for the selection of metal-enclosed switchgear and controlgear... 79
9.1 Overview... 79
9.101 Selection of ratings... 79
9.102 Choice of design and structure... 80
9.103 Internal arc fault... 85
9.104 Summary of technical requirements, ratings, optional tests... 90
9.105 Earthing circuit ratings... 92
9.106 Ratings for cable tests... 93
10 Data provided with orders, tenders, inquiries... 93
10.1 Overview... 93
10.2 Data to be provided with orders and inquiries... 93
10.3 Data to be provided when bidding... 95
11 Transport, storage, installation, operation, maintenance rules... 96
11.1 Overview... 96
11.2 Conditions for transportation, storage, installation... 96
11.3 Installation... 96
11.4 Operation... 96
11.5 Maintenance... 96
12 Safety... 97
12.1 Overview... 97
12.101 Procedure... 97
12.102 Internal arc aspects... 97
13 Impact of products on the environment... 97
Appendix A (Informative) Comparisons of chapter numbers between this standard and
IEC 62271-200.2011... 98
Appendix B (Normative) Internal arc fault - Methods to verify internal arc class (IAC)
... 106
Appendix C (Informative) Degrees of protection against electric shock for solid-
insulation enclosed switchgear and controlgear... 123
Appendix D (Normative) Method for calculating the cross-sectional area of bare
conductors based on the thermal effect of short-term continuous current... 128
Appendix E (Normative) Additional requirements for 3.6 kV ~ 40.5 kV AC metal-
enclosed switchgear and controlgear used in severe climatic conditions... 129
Appendix F (Normative) Partial discharge measurement... 138
Appendix G (Informative) Explanatory notes... 144
References... 150
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 3906-2006 "Alternating-current metal-enclosed
switchgear and controlgear for rated voltages above 3.6 kV and up to and including
40.5 kV". Compared with GB/T 3906-2006, the main technical changes are as follows.
- ADD the terms such as solid-insulation embedded components (see Chapter 3);
- ADD the rating of the internal arc class (IAC), specifying the rated arc fault current
and rated arc fault duration (see 5.101);
- ADD rated cable test voltage rating, specifying AC and DC test voltages (see 5.102);
- ADD the requirement that the main circuits in switchgear and controlgear use solid-
insulation embedded components (see 6.4);
- ADD the X-ray emission test (see 6.21);
- ADD the requirements for insulation testing of normally produced products every
eight years (see 7.1);
- ADD that "For metal-enclosed switchgear and controlgear with air insulation in the
compartments and solid-insulation embedded components in the main circuit, if
the use conditions in terms of condensation and pollution are stricter than the
normal use conditions specified in this standard, it shall be tested in accordance
with Appendix E; other types of metal-enclosed switchgear and controlgear may
be determined by agreement between the manufacturer and the user" (see 7.2.9);
- ADD the test requirements for switchgear and controlgear with fluid-filled and/or
main circuit using solid-insulation embedded components (see 7.2.10);
- CLARIFY the test voltage value and test duration of the cable test circuit (see
7.2.101);
- ADD the test operation requirements for doors or covers, shutters, wrong directions,
etc., proposing test requirements for human operating handles, requiring
verification of the integrity of other devices and slides that prevent access to the
operating interface, proposing supplementary test requirements for motor drive
interlocks, providing criteria for all the above tests (see 7.102.2);
- ADD the performance verification test for main circuits using solid-insulation
embedded components (see 7.107);
- RE-GRADE equipment operation continuity into four levels LSC1/2/2A/2B,
giving examples (see 9.102.3);
- ADJUST the content of 9.103, adding the IAC categories and other contents,
adjusting Table 3 of GB/T 3906-2006 into 9.104;
- ADD the ratings for earthing circuits and cable tests (see 9.105, 9.106);
- ADD the environmental impact of the product (see Chapter 13);
- ADD the comparison of chapter number between this standard and IEC 62271-
200.2011 (see Appendix A);
- ADD the electric shock degree of protection of solid-insulation enclosed
switchgear and controlgear (see Appendix C);
- MODIFY Appendix E according to IEC 62271-304;
- ADJUST the maximum allowable partial discharge amount. For metal-enclosed
switchgear and controlgear filled with fluid and/or main circuits using solid-
insulation embedded components, the maximum allowable partial discharge
amount under the test voltage is determined to be 20 pC. For other types of metal-
enclosed switchgear and controlgear, the partial discharge measurement test is
required to meet the final assembly level of not more than 100 pC (see F.5).
This standard, using the re-drafting method, to modify and adopt IEC 62271-200.2011
"High-voltage switchgear and controlgear - Part 200.AC metal-enclosed switchgear
and controlgear for rated voltages above 1 kV and up to and including 52 kV".
Compared with IEC 62271-200.2011, this standard has many adjustments in structure.
Appendix A lists the comparison list of chapter numbers between this standard and IEC
62271-200.2011.
The technical differences between this standard and IEC 62271-200.2011, as well as
their reasons, are as follows.
- Regarding normative references, this standard has made adjustments with technical
differences, to adapt to China's technical conditions. The adjustments are reflected
in Chapter 2 "Normative references". The specific adjustments are as follows.
● USE GB/T 1984-2014, which modifies and adopts international standard, to
replace IEC 62271-100;
● USE GB/T 1985-2014, which modifies and adopts international standard, to
replace IEC 62271-102;
● USE GB/T 2900.20-2016, which modifies and adopts international standard, to
replace IEC 60050-441.1984;
● USE GB/T 3804, which modifies and adopts international standard, to replace
IEC 62271-103;
● USE GB/T 4208-2017, which identically adopts international standard, to replace
IEC 60529.1989;
● USE GB/T 7354, which identically adopts international standard, to replace IEC
60270;
● USE GB/T 11022-2011, which modifies and adopts international standard, to
replace IEC 62271-1.2007;
● USE GB/T 16926, which modifies and adopts international standard, to replace
IEC 62271-105;
● USE GB/T 16927.1-2011, which modifies and adopts international standard, to
replace IEC 60060-1;
● USE GB/T 20002.4-2015, which modifies and adopts international standard, to
replace ISO/IEC Guide51.2014;
● USE GB/T 20138, which identically adopts international standard, to replace IEC
62262;
● DELETE the references to IEC 60050-151, IEC 60470.1999, IEC 62271-
201.2006, IEC/TS 62271-304;
● ADD the references to GB/T 762, GB/T 1408.1-2016, GB/T 2423.1, GB/T
2423.2, GB/T 2423.22, GB/T 8905-2012, GB/T 14808-2016;
- MODIFY the "Scope". Article 1.1 in IEC 62271-200.2011 stipulates 1 kV and
above but not more than 52 kV. According to the actual power grid situation in
China, it is changed to 3.6 kV ~ 40.5 kV; Article 1.1 in IEC 62271-200.2011
stipulates that the frequency is 60 Hz and below, it is changed into 50 Hz and below
in this standard (see Chapter 1);
- ADD the terms, such as "Solid-insulation embedded components" (see Chapter 3);
- ADD the requirement that the main circuits in switchgear and controlgear use solid-
insulation embedded components (see 6.4);
- ADD the test requirements for normal production products every eight years (see
7.1);
- ADD that "For metal-enclosed switchgear and controlgear with air insulation in the
compartments and solid-insulation embedded components in the main circuit, if
the use conditions in terms of condensation and pollution are stricter than the
normal use conditions specified in this standard, it shall be tested in accordance
with Appendix E; for other types of metal-enclosed switchgear and controlgear, it
may be determined by agreement between the manufacturer and the user" (see
7.2.9);
- ADD the test requirements for switchgear and controlgear filled with fluid and/or
main circuit using solid-insulation embedded component (see 7.2.10);
- ADD the performance verification test for main circuits using solid-insulation
embedded components (see 7.107);
- ADD the comparison of chapter numbers between this standard and IEC 62271-
200.2011 (see Appendix A);
- ADD the electric shock degree of protection of solid-insulation enclosed
switchgear and controlgear (see Appendix C);
- ADD the method to calculate the cross-sectional area of bare conductors, based on
the thermal effect of short-term continuous current (see Appendix D);
- ADD the additional requirements for 3.6 kV ~ 40.5 kV AC metal-enclosed
switchgear and controlgear, which is used in severe climatic conditions (see
Appendix E);
- For metal-enclosed switchgear and controlgear that are fluid-filled and/or have
solid-insulation embedded components in the main circuit, the maximum allowable
partial discharge under the test voltage is determined to be 20 pC. For other types
of metal-enclosed switchgear and controlgear, the partial discharge measurement
test is required to meet that the final assembly does not exceed 100 pC (see F.5);
- DELETE the regional differences in the original Appendix C.
This standard has made the following editorial changes.
- In order to be consistent with China's existing technical standard system, CHANGE
the standard name into "Alternating-current metal-enclosed switchgear and
controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV";
- ADD the explanatory notes (see Appendix G).
This standard was proposed by the China Electrical Equipment Industry Association.
This standard shall be under the jurisdiction of the National High Voltage Switchgear
Standardization Technical Committee (SAC/TC 65).
Drafting organizations of this standard. Xi'an High Voltage Electrical Equipment
Research Institute Co., Ltd., Shanghai Tianling Switch Factory Co., Ltd., China Electric
Power Research Institute Co., Ltd., Machinery Industry High Voltage Electrical
Equipment Quality Inspection Center, Schneider Electric (China) Co., Ltd., ABB
(China)) Co., Ltd., Schneider Electric (Xiamen) Switchgear Co., Ltd., Xiamen Huadian
Switch Co., Ltd., Beijing Kerui Distribution Automation Co., Ltd., Henan Senyuan
Electric Co., Ltd., Xidian Baoji Electric Co., Ltd., China Electric Power Research
Institute Electric Power Industry Electrical Equipment Quality Inspection and Testing
Center, Shanghai Electric Transmission and Distribution Test Center Co., Ltd., Tianshui
Great Wall Switch Factory Co., Ltd., State Grid Liaoning Electric Power Co., Ltd.,
Cooper (Ningbo) Electric Co., Ltd., Huayi Electric Co., Ltd., State Grid Anhui Electric
Power Company Electric Power Research Institute, Beijing Beikai Electric Co., Ltd.,
Siemens (China) Co., Ltd. Shanghai Branch, Zhejiang Bada Electronic Instrument Co.,
Ltd. Shitong Electric Branch, State Grid Zhejiang Electric Power Company Jinhua
Power Supply Co., Ltd., Pinggao Group Co., Ltd., Yunnan Power Grid Co., Ltd. Electric
Power Research Institute, State Grid Sichuan Electric Power Company Electric Power
Research Institute, Jiangsu Nari Telstar Electric Co., Ltd., Siemens Medium Voltage
Switch Technology (Wuxi) Co., Ltd., Xiamen ABB Switch Co., Ltd., Hefei University
of Technology Architectural Design and Research Institute, Huzhou Tailing Electric
Power Equipment Co., Ltd., Guangdong Fankai Electric Equipment Manufacturing Co.,
Ltd., Hangzhou Electric Power Equipment Manufacturing Co., Ltd. Lin'an Hengxin
Complete Electrical Manufacturing Branch, Fujian Senda Electric Co., Ltd., Anhui
Zhongdian Xingfa and Xinlong Technology Co., Ltd., Jiangsu Daquan Yangtze Electric
Co., Ltd., Shenzhen Jinbolian Electric Power Technology Co., Ltd., Chint Electric Co.,
Ltd., Sichuan Huayi Electric Co., Ltd., Toshiba Baiyun Vacuum Switchgear (Jinzhou)
Co., Ltd., Jiangsu Huaguan Electrical Appliances Group Co., Ltd., Chuankai Electrical
Co., Ltd., Shenzhen Guanghui Electrical Appliances Industrial Co., Ltd., Changde
Tianma Electrical Appliances Co., Ltd., Jinzhou Jinkai Electrical Appliances Group Co.,
Ltd., Sichuan Electrical Appliances Group Co., Ltd., Henan Huasheng Longyuan
Electric Co., Ltd., Eaton Electric Power Equipment Co., Ltd., Risheng Group Co., Ltd.,
Tianyi Yi Electric Co., Ltd., Shanghai Tianzheng Mechanical and Electrical (Group)
Co., Ltd., Guangdong Zhengchao Electric Co., Ltd., Yihe Electric Group Co., Ltd.,
Changzhou Pacific Electric Power Equipment (Group) Co., Ltd., Jiangsu Nanrui Pawel
Electric Co., Ltd., Ningbo Tianan (Group) Co., Ltd., Shandong Taikai Vacuum Switch
Co., Ltd., Shanghai Huayin Switch Factory Co., Ltd., Zhejiang Switch Factory Co.,
Ltd., Haining Switch Factory Co., Ltd., Yunnan Yunkai Electric Co., Ltd., Fuzhou
Tianyu Electric Co., Ltd., Hunan Switch Co., Ltd., Beihai Galaxy Switch Equipment
Co., Ltd., Tianjin Delitai Switch Co., Ltd., Ningxia Licheng Electric Group Co., Ltd.,
Shunte Electrical Equipment Co., Ltd., Guangdong Rongshun Electric Co., Ltd.,
Ningbo Shunli High Voltage Switch Technology Co., Ltd., Shanghai Zhenghao Electric
Power Technology Co., Ltd., Xiamen Xingxiakong Electric Co., Ltd.
The main drafters of this standard. Zhang Jinbo, Tian Enwen, Wu Hongyan, Zhang
Zixiao, Yuan Fuxing, Tan Yan, Feng Wujun, Yan Liping, Wang Ping, Dong Wei, Han
Chenguang, Hao Yuliang, Hu Jing, Liu Zhiqiang, Li Qiang, Han Sigen, Zhang Zhenqian,
Yang Yingjie, Lei Xiaoqiang, Chen Guochun, Song Baochun, Wu Bingchang, You
Yimin, Su Ping, Hu Zhaoming, Wang Yan, Ma Binglie, Liu Yang, Kou Zhengli, Wu
Chunjiu, Feng Xiuge, Yu Qingrui, Liu Aihua, Cui Wenjun, Shen Zhongwei, Li Ling,
Liu Chengxue, Tian Xiaoyue, Yang Wei, Li Binbin, Qiao Zhong, Dai Anlai, Gu
Longjiang, Tang Jun, Ye Shuxin, Lu Deyin, Yuan Duanglei, Wang Xiangke, Peng Jing,
Wang Jiayi, Dai Yongzheng, Han Jinming, Chen Xing, Wang Delong, Yang Zhijun,
Wang Zhiqing, Lu Yi'an, Wang Wanting, Chen Zeyin, Li Kaiming, Du Tianwa, Wang
Jianwen, Chen Tai, Yang Jianfa, Chang Yubin, Liu Junfeng, Ji Guanghui, Huang Xiande,
Feng Jiaxiang, Wang Dongmei, Yang Yong, Tang Jinping, Wang Lahong, Fan Jianrong,
Lin Aimin, Wei Jun, Wang Cunfu, Chen Yanliang, Kong Xiangchong, Yuan Chunping,
Yao Huailin, Lin Fuming, Zhu Peilong, Qin Chengwei, Jin Xinglong, Wu Weiguo, Yu
Huizhong, Feng Dongliang, Gong Shaocheng, Chen Jing, Tan Weiguang, Zhou Zhenye,
Zhao Zhenhe, Jin Junye, Zhang Fajin, Chen Zhaojin, Hu Guangfu, Cao Anchun, Feng
Jianxing.
This standard replaces the standard previously issued as follows.
- GB 3906-1983, GB 3906-1991, GB/T 3906-2006.
Alternating-current metal-enclosed switchgear and
controlgear for rated voltages above 3.6 kV and up to and
including 40.5 kV
1 Scope
This standard specifies the terms and definitions, usage conditions, ratings, design and
structure, type testing, exit-factory testing and other technical requirements for
alternating-current metal-enclosed switchgear and controlgear for rated voltages 3.6 kV
~ 40.5 kV.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
3 Terms and definitions
The terms and definitions as defined in GB/T 2900.20-2016 and GB/T 11022-2011, as
well as the following terms and definitions, apply to this document.
4 Normal and special conditions of use
According to the provisions of Chapter 2 of GB/T 11022-2011, with the following
additions.
5 Ratings
Follow the provisions of 4.5.1 in GB/T 11022-2011, with the following supplements.
Some main circuits of metal-enclosed switchgear and controlgear (such as busbars,
feeder lines, etc.) can have different rated current values.
6 Design and structure
Follow the provisions of 5.3 in GB/T 11022-2011, with the following supplements.
The interconnection within the functional units is ensured by electrical continuity
between frames, covers, doors, partitions or other components (e.g., fixed by screws or
welding methods). Doors to high voltage compartments shall be connected to the frame
by suitable means.
7 Type test
Follow the provisions of 6.2 in GB/T 11022-2011.
Since there are many types of design solutions, it is unrealistic to make specific
provisions for main circuit tests; however, in principle the following tests shall be
included.
8 Exit-factory test
The mechanical operation test is to prove that the switchgear and removable
components can complete the intended operation and that the mechanical interlocking
works normally.
All manufactured gas-filled compartments shall be pressure tested; each compartment
shall be able to withstand 1.3 times the design pressure for 1 minute.
9 Guidelines for the selection of metal-enclosed switchgear and controlgear
For a given operating mode, when selecting metal-enclosed switchgear and controlgear,
the ratings of each component shall meet the requirements under normal load conditions
and fault conditions. The ratings of metal-enclosed switchgear and controlgear
assemblies may differ from the ratings of the components.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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