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GB/T 20641-2025: Empty enclosures for low-voltage switchgear and controlgear assemblies - General requirements
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 20641-2025	English	554	Add to Cart	5 days [Need to translate]	Empty enclosures for low-voltage switchgear and controlgear assemblies - General requirements
GB/T 20641-2014	English	374	Add to Cart	3 days [Need to translate]	Empty enclosures for low-voltage switchgear and controlgear assemblies General requirements
GB/T 20641-2006	English	599	Add to Cart	3 days [Need to translate]	The shell general requirements of low voltage switchgear and control equipment

GB/T 20641-2025: Empty enclosures for low-voltage switchgear and controlgear assemblies - General requirements

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ICS 29.130.20 CCSK31 National Standards of the People's Republic of China Replaces GB/T 20641-2014 Low-voltage switchgear and controlgear General requirements for hollow shells General requirements Published on 2025-12-02 Implemented on July 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III Introduction V 1.Scope 1 2 Normative References 1 3.Terms and Definitions 2 4.Classification 4 5 Electromagnetic Compatibility (EMC) 4 6.Information provided regarding the casing 4 7.Usage conditions 6. 8.Design and Structure 7. 9.Type Testing Appendix A (Informative) List of Explanations for Certain Countries 19 References 20

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 20641-2014 "General Requirements for Empty Enclosures of Low-Voltage Switchgear and Controlgear Assemblies", and is consistent with... Compared with GB/T 20641-2014, apart from structural adjustments and editorial changes, the main technical changes are as follows. ---The regulations concerning electric shock protection have been amended, introducing the concepts of Class I and Class II enclosures, and correspondingly increasing the requirements for such enclosures. Summation experiments (see 3.10, 3.11, 8.5, 9.11, 9.12; 8.5, 8.6, 9.10, 9.11 in the.2014 edition); ---Added requirements for thermal dissipation capability in the information provided about the housing, and changed the type testing requirements for thermal dissipation capability (see...). Versions 6.3.7, 9.15 (version 9.14 of.2014); ---Static load requirements have been changed (see 8.2, 9.4, and 8.2, 9.4 in the.2014 version); ---Added relevant requirements for corrosion resistance in structures and designs (see 8.8); ---Added relevant requirements for enclosures constructed or covered with insulating materials in the structure and design (see 8.9); ---Type testing requirements for mechanical operation have been added (see 9.6); ---The type testing requirements for UV radiation resistance have been changed (see 9.13, 9.12 in the.2014 version). This document adopts IEC 62208.2023 "General requirements for empty enclosures of low-voltage switchgear and controlgear assemblies". Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Low-Voltage Switchgear and Control Equipment (SAC/TC266). This document was drafted by. Tianjin Electrical Science Research Institute Co., Ltd., Wankong Intelligent Manufacturing Co., Ltd., and Zhejiang Fangyuan Electrical Equipment Testing Co., Ltd. Limited Liability Company, Tianjin Tianchuan Electrical Control Equipment Testing Co., Ltd., Shenzhen Jinqihui Electric Co., Ltd., Zhejiang Pucheng Electric Co., Ltd., Yangzhou City Inspection and Testing Center, Jiangsu Provincial Power Distribution Equipment Product Quality Inspection and Testing Center, Basa Electric Technology Co., Ltd., Henan Xuji Instrument Co., Ltd. Company, Shanghai Wankong Cabinet Rack Co., Ltd., Chengdu Tongli Group Co., Ltd., Jiangsu Weiteng Power Distribution Co., Ltd., Shanghai Outong Electric Co., Ltd. Company, Wenzhou Deyuan Electric Co., Ltd., Shandong Wansheng Electric Co., Ltd., Jiangsu Huaqiang Power Equipment Co., Ltd., Foshan Haoxiang Electric Co., Ltd. The company, Beijing Huadian Meiyi Electric Technology Co., Ltd., Shenzhen Jingzhi Network Equipment Co., Ltd., Anhui Zhongzhi Electric Technology Testing Co., Ltd., and other companies. Chain Testing (Zhejiang) Co., Ltd., Hebei Jiuwei Electronic Technology Co., Ltd., Zhongtian Electric Technology Co., Ltd., Hongguang Electric Group Co., Ltd. Huntsman (Hangzhou) Power Technology Co., Ltd., Zhejiang Youtai Electric Co., Ltd., Hefei Yichuang Sheet Metal Technology Co., Ltd., Shanghai Liangxin Electrical Co., Ltd., Guangdong Bailin Electrical Equipment Factory Co., Ltd., Zhejiang Huahang Electric Co., Ltd., Shenglong Electric Group Co., Ltd. Company, Ningxia Longji Electric Co., Ltd., Ningbo AUX Intelligent Technology Co., Ltd., Zhong'anda Electric Technology Co., Ltd., Xinjiang Special Transformer Automation Equipment Co., Ltd., Beijing Herui Sail Electric Technology Co., Ltd., Zhejiang Zhongkong Xizi Technology Co., Ltd., Wuhan West High Electric Appliances Co., Ltd., Wenzhou Yika Lock Technology Co., Ltd., Tianjin Weikang Electrical Equipment Co., Ltd., Xiamen Minghan Electric Co., Ltd. The company, Shanghai Liudian Electric Co., Ltd., Guangdong Guangli Electric Technology Co., Ltd., Changzhou Taiping Communication Technology Co., Ltd., Jiangsu Haihang Electric Technology Co., Ltd., Wenzhou Jianli Electric Appliance Co., Ltd., Xuchang Intelligent Relay Co., Ltd., Baoding Jikai Electric Equipment Co., Ltd., and Da Hangyou Energy Electric Co., Ltd., Zhejiang Kangge Electric Co., Ltd., Ningbo Gongsheng Electric Technology Co., Ltd., Mindian Electric Co., Ltd., Hunan Electric Chinese Academy of Sciences Testing Group Co., Ltd., Zhejiang Electric Power Transformer Co., Ltd., Wuhan Huayuan Electric Power Design Institute Co., Ltd., Jiangsu Huachen Transformer Co., Ltd. Limited Liability Company, Zhejiang Hongxi Intelligent Technology Co., Ltd., Dongfang Electronics Co., Ltd., Anhui Qiguang Technology Co., Ltd., Yuanzhou Electric Co., Ltd. Limited Liability Company, Anhui Huayi Electric Co., Ltd., Shanghai Blue Arrow Electric Control Equipment Complete Set Co., Ltd., Zhejiang Changzheng Electric Co., Ltd., China Electric Equipment Group Co., Ltd. Shandong Electronics Co., Ltd., Chengdu Xinzongtai General Electric Co., Ltd., ASEAN Electric Group Nanjing Co., Ltd., Wenzhou Xie Hongcheng Cabinet Co., Ltd., Zhejiang Wantai Electric Technology Co., Ltd., Qingdao TGOOD Electric Co., Ltd., Ningbo Haiyue Electric Manufacturing Co., Ltd. Limited Liability Company, Henan Weiwo Electric Co., Ltd., Sichuan Dameng Tianan Power Group Co., Ltd., Huiwang Electric Co., Ltd., Junlang Electric Co., Ltd. The company, Hangzhou Shichuang Electronic Technology Co., Ltd., Yantai Chengtong Electric Technology Co., Ltd., Liruit Electric Co., Ltd., Jiangsu Zhongshun Electric Gas Co., Ltd., Xuanjin Smart Energy Technology Co., Ltd., Zhejiang Orili Electric Co., Ltd., Nanjing Huamai Technology Co., Ltd. Pinggao Group Intelligent Electric Co., Ltd. The main drafters of this document are. Han Yuying, Zhang Zhenzong, Zhang Liqian, Wu Hongxiao, Chen Bing, Bao Hailong, Chen Hongxia, Zhang Yi, Chen Xiaoyu, and Fu Zhaohui. Tao Yuan, You Feng, Wang Cheng, Xiang Zhangfeng, Guo Guanghui, Shan Hao, Chen Xuan, Zheng Yaochang, Xu Guangye, Wang Songyi, Cui Tao, Ren Kai, Zhang Shaojie, Zhou Yongjun, Yang Defu, Lin Cunpeng, Zeng Xuwen, Lu Feifei, Ni Jianfeng, Huang Songjie, Lin Yuyang, Li Dan, Xu Zhi, Xiao Fucai, Zhou Fuqiang, Ren Feng, Chen Ping, Zheng Yong, Zhou Xiong, Li Qianxing, Huang Wenrong, Han Ren, Wang Hongyan, Guan Zhiyang, Dai Wangbao, Ruan Liheng, Zhu Li, Zhang Hongtao, Liu Weiqing, Yao Jiuming, Lin Bingxiao Le Chaohua, Huang Anlai, Li Bin, Chen Hao, Cao Xiaoqing, Gao Dong, Sun Zhen, Zhang Kuan, Bao Kai, Ke Wei, Chen Shigang, Gao Xiaofeng, Ye Xiaoke, Song Qiang, Luo Hui, Gong Ping, Wang Dingjin, Wang Yu, Li Guangzhi, Zhang Leiming, Peng Dong, Zhang Huiquan, Xu Feng, Li Zhixiong, Chen Tao, Tong Yuanbo, Wang Sanyuan, Liu Yang, Long Bowen Liu Kun, Chen Liangliang, and Xue Yudong. The release history of this document and the document it replaces is as follows. ---First published in.2006 as GB/T 20641-2006; ---First revision in.2014; ---This is the second revision.

Introduction

The purpose of this document is to harmonize, as far as possible, the rules applicable to all common properties of empty enclosures for low-voltage switchgear and controlgear assemblies. The requirements are to ensure consistency between the requirements and verification of the empty shell and to avoid verification in other standards. Low-voltage switchgear and controlgear General requirements for empty shells

1 Scope

This document applies to empty enclosures provided by the enclosure manufacturer prior to the installation of switchgear and control equipment components by the assemblies manufacturer. Body (hereinafter referred to as "shell"). This document specifies the enclosure designations for low-voltage switchgear and controlgear assemblies (e.g., conforming to the IEC 61439 series product standards). Definition, classification, performance, and testing requirements. Its rated voltage is AC not exceeding 1000V or DC not exceeding 1500V, suitable for indoor or outdoor use. External applications. Note 1.Additional requirements may be added for special applications. Note 2.The housing described in this document is for the installation of electrical components. This document does not apply to housings mentioned in other specific product standards (such as IEC 60670-24). The equipment manufacturer is responsible for ensuring that the final product manufactured using the housing meets the safety requirements of the relevant product standards. Note 3.This document can be used as a base standard for other technical committees.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 2423.4-2008 Environmental testing of electrical and electronic products – Part 2.Test methods – Test Db. Alternating damp heat (12h) (12h cycle) (IEC 60068-2-30.2005, IDT) GB/T 2423.17-2024 Environmental testing—Part 2.Test methods—Test Ka. Salt spray (IEC 60068-2-11.2021, IDT) GB/T 5169.5-2020 Fire Hazard Testing of Electrical and Electronic Products - Part 5.Test Flame Needle Flame Test Method and Apparatus Recognize the test methods and guidelines (IEC 60695-11-5.2016, IDT) GB/T 9286-2021 Paints and varnishes - Cross-cut test (ISO 2409.2020, IDT) GB/T 11021-2014 Electrical insulation – Heat resistance and representation method (IEC 60085.2007, IDT) GB/T 16422.2-2022 Plastics - Laboratory Light Source Exposure Tests - Part 2.Xenon Arc Lamps (ISO 4892-2. 2013, IDT) IEC 60068-2-2.2007 Environmental testing of electrical and electronic products – Part 2.Test methods – Test B. High temperature Note. GB/T 2423.2-2008 Environmental testing for electrical and electronic products – Part 2.Test methods – Test B. High temperature (IEC 60068-2-2.2007, IDT) Note. GB/T 16895 (all parts) Low-voltage electrical installations [IEC 60364 (all parts)] 1) Combined version 2.2 (2013), which includes IEC 60529 (1989) and its first amendment (1999) and second amendment (2013). IEC 60529.1989/AMD1.1999 Amendment No. 1 to Enclosure Protection Ratings (IP Code) IEC 60529.1989/AMD2.2013 Amendment No. 2 to Enclosure Protection Ratings (IP Code) Note. GB/T 4208-2017 Degrees of protection provided by enclosures (IP code) (IEC 60529.2013, IDT) ...