GB 7251.2-1997
Replaced
GB/T 7251.1-2023
Active
National standards
GB/T 7251.1-2023 Low-voltage switchgear and controlgear assemblies—Part 1:General rules
GB/T 7251.1-2023 Low-voltage switchgear and controlgear assemblies—Part 1:General rules
Price:
$ 225
Basic Information
Standard Code:
GB/T 7251.1-2023
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Low-voltage distribution electrical equipment
ICS Name:
Low-voltage switchgear and controllers
Publish Date:
2023-08-06
Implement Date:
2024-03-01
Pages:
132 pages
Scope
This document specifies the general definitions, usage conditions, structural requirements, technical characteristics, and verification requirements for low-voltage complete switchgear and control equipment.
Note: In this document, the term "complete switchgear" (see 3.1.1) refers to low-voltage complete switchgear and control equipment.
For the purpose of determining the conformity of complete switchgear, the requirements of IEC 61439-2 and subsequent related parts apply together with the requirements referenced in this document. For complete switchgear not covered by IEC 61439-3 and subsequent parts, IEC 61439-2 applies.
This document applies only to complete switchgear that meets the requirements of the following relevant complete switchgear standards:
——Complete switchgear with a rated voltage of not more than 1,000 V AC or 1,500 V DC;
——Complete switchgear designed for a nominal frequency of not more than 1,000 Hz for the incoming power supply;
——Complete switchgear intended for indoor and outdoor use;
——Fixed or mobile complete switchgear with or without a casing;
——Complete switchgear used in conjunction with equipment for power generation, transmission, distribution, and energy conversion, as well as equipment for controlling energy consumption.
This document does not apply to individual devices and fully assembled components that comply with their respective product standards, such as motor starters, fuse-type switches, power electronic converter systems and equipment (PECS), switching power supplies (SMPS), uninterruptible power supplies (UPS), basic drive modules (BDM), complete drive modules (CDM), speed-regulated electric drive systems (PDS), and other electronic equipment. This document describes the integration of devices and fully assembled components into complete switchgear or into empty casings to form complete switchgear.
For some applications involving, for example, explosive environmen
Development Information
Same series standard
Replace the following standards
Referenced Standards
GB/T 2423.2-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests B:Dry heat
GB/T 2423.4-2008 Environmental testing for electric and electronic products—Part 2:Test method—Test Db:Damp heat,cyclic(12 h+12 h cycle)
GB/T 2423.17-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Test Ka:Salt mist
GB/T 4025-2010 Basic and safety principles for man-machine interface,marking and identification—Coding principles for indicators and actuators
GB/T 4026-2019 Basic and safety principles for man-machine interface,marking and identification—Identification of equipment terminals,conductor terminations and conductors
GB/T 4205-2010 Basic and safety principles for man-machine interface(MMI),marking and identification—Actuating principles
GB/T 5094.1-2018 Industrial systems,installations and equipment and industrial products—Structuring principles and reference designations—Part 1:Basic rules
GB/T 5169.10-2017 Fire hazard testing for electric and electronic products—Part 10:Glowing/hot-wire based test methods—Glow-wire apparatus and common test procedure
GB/T 5169.11-2017 Fire hazard testing for electric and electronic products—Part 11:Glowing/hot-wire based test methods—Glow-wire flammability test method for end-products(GWEPT)
GB/T 11021-2014 Electrical insulation—Thermal evaluation and designation
GB/T 16895.6-2014 Low-voltage electrical installations—Part 5-52:Selection and erection of electrical equipment—Wiring systems
GB/T 16895.18-2010 Electrical installations of buildings—Part 5-51:Selection and erection of electrical equipment—Common rules
GB/T 16935.1-2008 Insulation coordination for equipment within low-voltage systems—Part 1:Principles,requirements and tests
GB/T 17626.4-2018 Electromagnetic compatibility—Testing and measurement techniques—Electrical fast transient/burstimmunity test
GB/T 17626.6-2017 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances,induced by radio-frequency fields
GB/T 17627-2019 High-voltage test techniques for low-voltage equipment—Definitions,test and procedure requirements,test equipment
GB 17799.3-2012 Electromagnetic compatibility(EMC)—Generic standards—Emission standard for residential, commercial and light-industrial environments
GB/T 20641-2014 Empty enclosures for low-voltage switchgear and controlgear assemblies—General requirements
GB/T 24276-2017 A method of temperature-rise verification of low-voltage switchgear and controlgear assemblies by calculation
GB/T 35698.1-2017 Calculation of effects of short-circuit currents—Part 1:Definitions and calculation methods
ISO 178:2019
ISO 179-1:2010
ISO 179-2:2020
ISO 2409
ISO 4628-3:2016
ISO 4892-2:2013
ISO 7010
IEC 60364(所有部分)
IEC 60364-1
IEC 60364-4-41:2005
IEC 60364-4-41:2005/AMD1:2017
IEC 60529:1989
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60695-2-12
IEC 60947-4-1:2018
IEC 61000-4-2:2008
IEC 61000-4-3:2020
IEC 61000-4-5:2014
IEC 61000-4-5:2014/AMD1:2017
IEC 61000-4-8:2009
IEC 61000-4-11:2020
IEC 61000-6-4:2018
IEC 61082-1:2014
IEC 61439(所有部分)
IEC 61921:2017
IEC 81346-2:2019
CISPR 11:2015
CISPR 11:2015/AMD1:2016
CISPR 11:2015/AMD2:2019
CISPR 32:2015
CISPR 32:2015/AMD1:2019
Adopt standards
IEC 61439-1:2020
Related Standards
GB/T 11022-1999
Replaced
GB/T 11022-1999 Common specifications for high-voltage switchgear and control gear standards
GB/T 18858.1-2002
Replaced
GB/T 18858.1-2002 Low-voltage switchgear and control gear Controller-device interface(CDIs)—Part 1:General rules
GB/T 18858.3-2002
Replaced
GB/T 18858.3-2002 Low-voltage switchgear and control gear—Controller-Device interface(CDI)—Part 3:Device Net
GB/Z 18859-2002
Replaced
GB/Z 18859-2002 Enclosed low-voltage switchgear and controlgear Assemblies—Guide for testing under conditions of arcing due to internal fault
GB 14048.4-2003
Replaced