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GB/T 45655-2025General modular electrical cabinets with narrow-sized dimensions (English PDF)

通用窄尺寸模数化电气机柜

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 25, 2025

Implementation date

November 1, 2025

Scope

GB/T 45655-2025 is the English-translated version of 通用窄尺寸模数化电气机柜.

GB/T 45655-2025 is the Chinese national standard covering a switchgear cabinet 375 mm to 500 mm wide built on the modular pitch — the metric and imperial structures and the coordination dimensions that let equipment from different suppliers meet, the verification samples and the simulated load they carry, the protective circuit continuity and the earthing terminal, the damp heat and industrial atmosphere, the stiffness, vibration and impact, the ingress protection and flammability, and the seismic test. A cabinet of relay protection equipment has to stay upright and keep its door shut through an earthquake, and the seismic method in the annex is what decides that. First edition, in force from 1 November 2025. Issued on 25 April 2025, it has been in force since 1 November 2025.

Document preview — GB/T 45655-2025

National Standard of the People's Republic of China

ICS: 31.240
Classification: K 05

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions2
4 Size2
4.1 Metric module2
4.2 Imperial Mechanical Structure2
4.3 Compatible cabinets2
4.4 Coordination Dimensions2
5 Verification samples, test conditions and sequence2
5.1 Verify sample manufacturing materials2
5.2 Verification sample composition3
5.3 Verification samples and their tests3
5.4 Verification sample configuration and simulated load3
5.5 Test conditions5
5.6 Test sequence5
5.7 Verification level identification5
6 Requirements5
6.1 Surface5
6.2 Continuity of protection circuit5
6.3 Protective grounding terminal5
6.4 Low temperature, high temperature and damp heat (cycle) resistance5
6.5 Resistance to industrial atmosphere6
6.6 Rated load resistance test performance7
6.7 Vertical structure test performance7
6.8 Stiffness resistance test performance8
6.9 Vibration and shock test performance9
6.10 Protection level9
6.11 Anti-collision performance9
6.12 Earthquake resistance10
6.13 Flammability10
7 Test and qualification determination10
7.1 Surface inspection10
7.2 Continuity test of protection circuit10
7.3 Inspection of protective grounding terminal10
7.4 Low temperature, high temperature and damp heat (cycle) test10
7.5 Industrial atmosphere test10
7.6 Rated load test10
7.7 Vertical structure test11
7.8 Stiffness test11
7.9 Vibration and shock test12
7.10 Protection level verification12
7.11 Collision Test12
7.12 Earthquake Test12
7.13 Flammability test12
8 Inspection Rules12
8.1 Inspection categories12
8.2 Inspection Items12
Appendix A (Normative) Cabinet seismic test method14
References19

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed and coordinated by the National Technical Committee for Comprehensive Standardization of Electrical and Electronic Equipment Structures (SAC/TC34).

This document was drafted by: Beijing Institute of Electrical Technology and Economics of Machinery Industry, Suzhou Electric Science Research Institute Co., Ltd., Jiangsu Group Ling Energy Technology Co., Ltd., Henan Xuji Electric Equipment Co., Ltd., Beijing Sifang Jibao Engineering Technology Co., Ltd., Shengzhongyi Electric Power Technology Co., Ltd., Hubei Jinfu Technology Co., Ltd., Jiangsu Tiangang Cabinet Co., Ltd., Zhangjiagang Tianyi Electric Complete Structural Parts Co., Ltd., Jiangsu Tianxiang Electric Co., Ltd., Zhangjiagang Tianyue Electric Co., Ltd., Beijing Sifang Relay Protection Automation Co., Ltd., China Electronics Technology Group Co., Ltd.

The 36th Institute of China National Technology Group Corporation, State Power Nanjing Automation Co., Ltd., Nanjing NARI Relay Protection Electric Co., Ltd., Legrand Low Voltage Electric (Wuxi) Co., Ltd., Nanyang Electric Group Co., Ltd., Yunda Energy Technology Group Co., Ltd., China Quality Certification Center Co., Ltd., Xuji Electric Co., Ltd., and Yueqing Feilei Cabinet Lock Co., Ltd.

The main drafters of this document are: Guo Yan, Hu Chun, Jiang Zhongyao, Wang Tinghua, Li Jianxia, Xiong Jiawei, Li Shuannan, Huang Fentian, Xu Feilei, Wu Jue, Zhu Yabin, Ye Jun, Lu Hu, Jiang Xincheng, Jin Dayuan, Yu Chunlin, Yu Haibo, Ma Chaoqun, Chu Jianchao, Pan Zhengdong, Li Zhengqing, Wang Jiangtao, Zhao Zhijian, Wang Jiule, Wang Gang, Cai Huimin, Meng Wei, Huang Guanglin, and Ge Guiyi.

Universal narrow size modular electrical cabinet

1 Scope

This document specifies the dimensions, verification samples, and test conditions of modular electrical cabinets (hereinafter referred to as cabinets) with a width of 375mm~500mm.

Conditions and sequence, requirements, tests and qualification determination, and inspection rules.

This document applies to the production, manufacturing and acceptance of cabinets.

Note. The technical requirements indicated in this document do not cover all cabinet requirements. Manufacturers and users should note that there may be some extension requirements when applying cabinet products.

If the design may affect the safety performance of the product, if there is a risk, the manufacturer and the user should have an appropriate agreement and agree on the risk-bearing responsibility.

2 Normative references

GB/T 2423.1

GB/T 2423.2

GB/T 2423.4

GB/T 2423.5

GB/T 2423.10

GB/T 2423.17

GB/T 2423.18

GB/T 2423.19

GB/T 2423.20

GB/T 2423.43

GB/T 2423.48

GB/T 2424.11

GB/T 2424.25

GB/T 3047.1

GB/T 4208

GB/T 4798.3-2023

GB/T 5169.16-2017

GB/T 8582

GB/T 17214.4

GB/T 19290.1

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2423.1 · GB/T 2423.2 · GB/T 2423.4 · GB/T 2423.5 · GB/T 2423.10 · GB/T 2423.18 · GB/T 2423.19 · GB/T 2423.20 · GB/T 2423.43 · GB/T 2423.48 · GB/T 2424.11 · GB/T 2424.25 · GB/T 5169.16-2017 · GB/T 17214.4 · GB/T 19290.1

Editions of GB/T 45655

Edition	Title	Revision	Status
GB/T 45655-2025	General modular electrical cabinets with narrow-sized dimensions	current edition	Current

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