GB/T 7251.1-2023: Low-voltage switchgear and controlgear assemblies - Part 1: General rules

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Scope

This Document lays down the general definitions and service conditions, construction
requirements, technical characteristics and verification requirements for low-voltage
switchgear and controlgear assemblies.
NOTE. Throughout this document, the term assembly(s) (see 3.1.1) is used for a low-voltage switchgear
and controlgear assembly(s).
For the purpose of determining assembly conformity, the requirements of the relevant part of
the IEC 61439 series, Part 2 onwards, apply together with the cited requirements of this
document. For assemblies not covered by IEC 61439-3 onward, IEC 61439-2 applies.
This document applies to assemblies only when required by the relevant assembly standard as
follows.
– assemblies for which the rated voltage does not exceed 1 000 V AC or 1 500 V DC;
– assemblies designed for a nominal frequency of the incoming supply or supplies not
exceeding 1 000 Hz;
– assemblies intended for indoor and outdoor applications;
– stationary or movable assemblies with or without an enclosure;
– assemblies intended for use in connection with the generation, transmission, distribution
and conversion of electric energy, and for the control of electrical energy consuming
equipment.
This document does not apply to individual devices and self-contained components such as
motor starters, fuse switches, power electronic converter systems and equipment (PECS),
switch mode power supplies (SMPS), uninterruptable power supplies (UPS), basic drive
modules (BDM), complete drive modules (CDM), adjustable speed power drives systems
(PDS), and other electronic equipment which comply with their relevant product standards.
This document describes the integration of devices and self-contained components into an
assembly or into an empty enclosure forming an assembly.
For some applications involving, for example, explosive atmospheres, functional safety, there
can be a need to comply with the requirements of other standards or legislation in addition to
those specified in the IEC 61439 (all parts).

Basic Data

Standard ID	GB/T 7251.1-2023 (GB/T7251.1-2023)
Description (Translated English)	Low-voltage switchgear and controlgear assemblies - Part 1: General rules
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K31
Classification of International Standard	29.130.20
Word Count Estimation	134,120
Date of Issue	2023-08-06
Date of Implementation	2024-03-01
Older Standard (superseded by this standard)	GB/T 7251.1-2013
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration