GB/T 3906-2020Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV (English PDF)

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.