GB 7251.3-2006
Low-voltage switchgear and controlgear assemblies. Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use. Distribution boards (English Version)

Standard No.

GB 7251.3-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2018-05

Replace By

GB/T 7251.3-2017

Latest

GB/T 7251.3-2017

Replace

GB 7251.3-1997

Scope

This part gives supplementary requirements for enclosed distribution boards (DBU), which are equipped with protective devices and are indoor fixed installation type test equipment (TTA), suitable for civil (household) or non-professional Use in places where personnel can enter. The switchboard can also include control devices and/or signaling devices. They are used for AC and their nominal voltage to ground does not exceed 300V. When the total input load current does not exceed 250A, the rated current of each short-circuit protection device included in the output circuit does not exceed 125A. Under normal circumstances, such equipment can be accessed by non-professionals, for example to operate switches or replace fuses.

GB 7251.3-2006 Referenced Document

• GB/T 13539.3 Low-voltage fuses—Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications)—Examples of standardized systems of fuses A to F*， 2017-11-01 Update
• GB/T 5169.10 Fire Hazard Tests for Electrical and Electronic Products - Part 10: Glow Wire/Hot Wire Basic Test Methods Glow Wire Apparatus and General Test Methods*， 2018-07-01 Update
• GB/T 5169.11 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)*， 2017-12-29 Update
• GB/T 5169.12 Fire hazard testing for electric and electronic products.Part 12: Glowing/hot-wire based test methods.Glow-wire flammability index (GWFI) test method for materials*， 2013-12-17 Update
• GB/T 5169.13 Fire hazard testing for electric and electronic product.Part 13:Glowing/hot-wire based test methods.Glow-wire ignition temperature (GWIT) test method for materials*， 2013-12-17 Update

GB 7251.3-2006 history

• 2017 GB/T 7251.3-2017 Low-voltage switchgear and controlgear assemblies.Part 3:Distribution boards intended to be operated by ordinary persons(DBO)
• 2006 GB 7251.3-2006 Low-voltage switchgear and controlgear assemblies. Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use. Distribution boards
• 1997 GB 7251.3-1997 Low-voltage switchgear and controlgear assemblies. Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use--Distribution boards

GB 7251.3-2006 Low-voltage switchgear and controlgear assemblies. Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use. Distribution boards was changed to GB/T 7251.3-2017 Low-voltage switchgear and controlgear assemblies.Part 3:Distribution boards intended to be operated by ordinary persons(DBO).

GB 7251.3-2006 -All Parts