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GB/T 24621.1-2021: Application guide for electric safety of low-voltage switchgear and controlgear assemblies - Part 1: Switchgear assemblies
Status: Valid GB/T 24621.1: Evolution and historical versions
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| GB/T 24621.1-2021 | English | 769 |
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Application guide for electric safety of low-voltage switchgear and controlgear assemblies - Part 1: Switchgear assemblies
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GB/T 24621.1-2021
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| GB/T 24621.1-2009 | English | RFQ |
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Application guide for electric safety of low-voltage switchgear and controlgear assemblies -- Part 1: Switchgear assemblies
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Basic data | Standard ID | GB/T 24621.1-2021 (GB/T24621.1-2021) | | Description (Translated English) | Application guide for electric safety of low-voltage switchgear and controlgear assemblies - Part 1: Switchgear assemblies | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K31 | | Word Count Estimation | 42,442 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 24621.1-2021: Application guide for electric safety of low-voltage switchgear and controlgear assemblies - Part 1: Switchgear assemblies
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Application guide for electric safety of low-voltage switchgear and controlgear assemblies - Part 1.Switchgear assemblies
ICS 29.120
CCSK31
National Standards of People's Republic of China
Replace GB/T 24621.1-2009
Low-voltage switchgear and control equipment
Electrical Safety Application Guide
Part 1.Complete switchgear
Released on 2021-10-11
2022-05-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
Introduction Ⅴ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
3.1 General terms 2
3.2 Protection against electric shock 3
3.3 Insulation 3
4 Interface characteristics 3
4.1 General Principle 3
4.2 Voltage rating data 4
4.3 Current rating data 4
4.4 Rated dispersion factor (RDF) 5
4.5 Rated frequency (fn) 5
4.6 Other characteristics 5
5 Information 6
5.1 Marking of complete equipment 6
5.2 File 6
5.3 Identification of devices and/or components 6
6 Structural points 7
6.1 Strength of materials and components 7
6.2 Degree of protection of the enclosure of the complete set of equipment 8
6.3 Electrical clearance and creepage distance 9
6.4 Protection against electric shock 9
6.5 Combination of switching devices and components 13
6.6 Internal circuit and connection 15
6.7 External wire terminal 16
7 Performance points 17
7.1 Dielectric properties 17
7.2 Temperature rise 18
7.3 Short-circuit protection and short-circuit withstand strength 20
7.4 Protecting circuit integrity 23
7.5 Electromagnetic compatibility (EMC) 24
7.6 Safe operation 27
Appendix A (Informative) User Information Template 29
Appendix B (informative) Design verification list to be verified 32
Reference 33
Table 1 Comparison of the operation direction of the manual operation device and the final effect 14
Table 2 Safety color code and commonly used button, indicator light, wire color 14
Table 3 Alphanumeric identification and graphic symbol identification of wires and their terminals 16
Table 4 Other safety symbols 17
Table 5 Temperature rise limit 18
Table 6 Typical power loss 20
Table 7 Checklist for short-circuit verification by comparison with a baseline design 21
Table 8 Test for EMC immunity in Class A environment 25
Table 9 Test for EMC immunity in class B environment 26
Table 10 Acceptance criteria when electromagnetic disturbance occurs 27
Table A.1 User Information Template 29
Table B.1 Design verification list to be verified 32
Foreword
This document is in accordance with GB/T 1.1-2020 "Guidelines for Standardization Part 1.Structure and Rules of Standardization Documents"
Drafting.
This document is the first part of GB/T 24621 "Guidelines for the Electrical Safety Application of Low-Voltage Switchgear and Control Equipment".
GB/T 24621 has released the following parts.
---Part 1.Complete switchgear.
This document replaces Part 1 of GB/T 24621.1-2009 "Electrical Safety Application Guidelines for Low-Voltage Switchgear and Control Equipment
Sub. Complete Switchgear. Compared with GB/T 24621.1-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Other features have been modified (see 4.6, 4.2.5 of the.2009 edition);
b) Modified the mark of complete equipment (see 5.1, 4.3.2 of the.2009 edition);
c) Deleted the structural key points of the protection level of the internal compartment (see 5.2.4 of the.2009 edition);
d) The main points of the structure of the combination of switching devices and components have been added (see 6.5);
e) Modified the main points of the internal circuit and connection structure (see 6.6, 6.6 of the.2009 edition);
f) The main points of the structure of the external wire terminal have been added (see 6.7);
g) Modified the test voltage value and test voltage frequency in the power frequency withstand test (see 7.1.2, 6.4.3 of the.2009 edition);
h) Modified the contents of Table 6 and Table 7 (see Table 6 and Table 7; Table 5 and Table 6 in the.2009 edition);
i) Modified the verification method of short-circuit protection circuit and short-circuit withstand strength (see 7.3, 6.2 of the.2009 edition);
j) Modified the verification method of the short-circuit withstand strength of the protection circuit (see 7.4.4, 6.3.3 of the.2009 edition)
k) Modified the performance points of electromagnetic compatibility (EMC) (see 7.5, 6.7 of the.2009 edition);
l) Deleted Appendix B and Appendix D (see Appendix B and Appendix D of the.2009 edition).
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Low-Voltage Switchgear and Control Equipment Standardization Technical Committee (SAC/TC266).
Drafting organizations of this document. Tianjin Electric Research Institute Co., Ltd., Tianjin Tianchuan Electric Control Equipment Testing Co., Ltd., Huiwang Electric Co., Ltd.
Company, Shandong Houyu Industrial Co., Ltd., Hunan Electrical Apparatus Research Institute Co., Ltd., Hangzhou Electric Equipment Manufacturing Co., Ltd. Xiaoshan Xinmeicheng
Electric Manufacturing Branch, Daquan Group Co., Ltd., Jiangsu Huaqiang Power Equipment Co., Ltd., Zhongtian Electric Technology Co., Ltd., Hangzhou Electric Power
Equipment Manufacturing Co., Ltd. Yuhang Qunli Complete Electrical Manufacturing Branch, Guangdong Guangxin Technology Co., Ltd., Hongguang Electric Group Co., Ltd.,
Guangdong Pearl River Switch Co., Ltd., Rockwell Automation Control Integration (Shanghai) Co., Ltd., Guangdong Heimer Industrial Technology Co., Ltd., Hangzhou
Zhijiang Switchgear Co., Ltd., Hunan Chengyuan Electric Co., Ltd., Shenglong Electric Group Co., Ltd., Hengyi Electric Group Co., Ltd.,
Shanghai AIA Electric (Group) Co., Ltd., AIA Electric (Pinghu) Co., Ltd., China Inspection Institute of Quality and Technology Inspection and Testing Co., Ltd.
Company, Chint Electric Co., Ltd., Jiangsu Weiteng Power Distribution Co., Ltd., Huaxiang Xiangneng Technology Co., Ltd., Chuankai Electric Co., Ltd.
Company, Chongqing Shineng Power Equipment Co., Ltd., Guangdong Bailin Electrical Equipment Factory Co., Ltd., Shengli Oilfield Hengyuan Electric Co., Ltd., Shanghai
Electrical Equipment Testing Institute Co., Ltd., Shandong Lu Liengyuan Electrical Equipment Co., Ltd., Zhebao Electric (Hangzhou) Group Co., Ltd., Shanghai Huajian
Switch Co., Ltd., Henan Zhongke Hoisting Electric Co., Ltd., Shanghai Shangyuan Pump Manufacturing Co., Ltd., Shanghai Kaiyuan Pump Co., Ltd., Beijing
Zhongxing Tianchuan Electric Technology Co., Ltd., Dongying Nanfang Electric Co., Ltd., China Electric Power Research Institute Co., Ltd., State Grid Hunan
Provincial Electric Power Co., Ltd. Power Supply Service Center (Metering Center).
The main drafters of this document. Zhang Lei, He Liwei, Xu Feng, Hu Chenguang, Chen Kefu, Xu Jintong, Yang Quanbing, Chen Tingjian, Tang Binfu, Zhang Xufeng,
Cai Xianzhen, Lin Boyang, Zhang Bocheng, Liu Enfei, He Zhixin, Zhuang Yaoding, Yang Yu, Xie Zhengxin, Lin Jiahao, Wang Guoliang, Wang Shuai, Wu Hua, Zhu Qinhua,
Yang Yimin, Chen Kang, Zhang Bing, Li Yanping, Huang Songjie, Zhang Haifeng, Cui Tao, Wang Jianyong, Jiang Xiaodong, Wang Qi, Yu Miao, Wu Changhui, Lu Jianchong, Zhao Jianping,
Chen Youlai, Yuan Xiangyu, Chen Hao.
The previous releases of this document and the documents it replaced are as follows.
--- First published in.2009 as GB/T 24621.1-2009;
---This is the first revision.
Introduction
Low-voltage switchgear and control equipment are widely used in residential houses, public places, public welfare sites and other places.
The places where the gas equipment is equipped are equipped with this type of product.
As a result, the safety and reliability of low-voltage complete sets of equipment are very important, and the safety performance has also become a low
Important factors that need to be considered when compressing a complete set of switchgear and control equipment. Fully understand the electrical safety technology of low-voltage complete sets of equipment, and be able to enter
One step is to ensure the personal and equipment safety of the low-voltage complete set of equipment in use and operation. GB/T 24621 aims to describe low-voltage switchgear and
The electrical safety technology of control equipment provides a guide for the safe application of low-voltage complete sets of equipment. It is planned to consist of two parts.
---Part 1.Complete switchgear. The purpose is to explain the important content related to the safety technology of the complete set of switchgear, and to open the complete set of
Provide safety guidance on the operation and application of the equipment.
---Part 2.Control equipment equipped with electronic devices. The purpose is to explain the content related to the safety technology of electronic control equipment.
The operation application of the equipment provides safety guidance.
This document serves as a guide for the safe application of all types of low-voltage switchgear sets, and provides guidance on the design, manufacturing, sales and use of low-voltage switchgear sets.
The safety structure and performance points that need special attention when used are elaborated, and the parts related to safety and reliability are made.
Re-explain that the temperature rise, short-circuit withstand strength, dielectric performance, effectiveness of the protection circuit, electrical clearance and creepage distance are explained one by one, as
The safety application of low-voltage switchgear sets provides guidance to ensure the safety and reliability of low-voltage switchgear sets during normal operation.
Low-voltage switchgear and control equipment
Electrical Safety Application Guide
Part 1.Complete switchgear
1 Scope
This document provides safety application guidelines for low-voltage switchgear sets (hereinafter referred to as “complete sets of equipment”) in the design, manufacture, sales and use.
Guide, gives the interface characteristics, information, structural points and performance points of low-voltage switchgear in safety technology that need to be considered.
Related information.
This document is applicable to all types of low-voltage switchgear under the GB/T 7251 series of standards.
Note. When the products covered by this document work under the special conditions of use in GB/T 7251, corresponding additional clauses need to be added.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 2423.4 Environmental testing of electrical and electronic products Part 2.Test method Test Db. Alternating damp heat (12h 12h cycle
ring)
GB/T 2423.17 Environmental testing of electrical and electronic products Part 2.Test method Test Ka. Salt spray
GB/T 4025 Basic and safety rules for human-machine interface signs and coding rules for indicators and operating devices
GB/T 4026-2019 Basic and safety rules for the identification of human-machine interface logos for equipment terminals, conductor terminals and conductor identification
GB/T 4205 Basic and safety rules for human-machine interface signs and operation rules
GB/T 4208 Shell protection grade (IP code)
GB/T 7251.1-2013 Low-voltage switchgear and control equipment Part 1.General
GB/T 11021 Heat resistance of electrical insulation and its representation method
GB/T 11026 (all parts) Heat resistance of electrical insulating materials
GB/T 16895 (all parts) low-voltage electrical installations
GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test
GB/T 17626.4 Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity test
GB/T 17626.5 Electromagnetic compatibility test and measurement technology surge (impact) immunity test
GB/T 17626.6 Electromagnetic compatibility test and measurement technology Radio frequency field induced conducted disturbance immunity
GB/T 17626.8 Electromagnetic compatibility test and measurement technology Power frequency magnetic field immunity test
GB/T 17626.11 Electromagnetic compatibility test and measurement technology Voltage sag, short-term interruption and voltage change immunity test
GB/T 17626.13 Electromagnetic compatibility test and measurement technology AC power port harmonics, inter-harmonic waves and low-frequency immunity of power grid signals
Disturbance test
GB/T 20138 The degree of protection of electrical equipment enclosures against external mechanical collisions (IK code)
GB/T 24276 A method for verifying the temperature rise of low-voltage switchgear and control equipment through calculations
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