GB 12476.5-2013
Electrical apparatus for use in the presence of combustible dust.Part 5: Protection by enclosures "tD" (English Version)

Standard No.

GB 12476.5-2013

Language

Chinese, Available in English version

Release Date

2013

Published By

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

Status

Be replaced 2022-05

Replace By

GB/T 3836.31-2021

Latest

GB/T 3836.31-2021

Scope

This part of GB 12476 applies to electrical equipment protected by enclosures and limited surface temperatures in combustible dust environments. In this environment, combustible dust can be present in quantities that can cause a fire or explosion hazard. This Part specifies the design, construction and test requirements for electrical equipment. This part is a supplement to the general requirements of GB 12476.1. Prevention of ignition is mainly to limit the maximum surface temperature of the enclosure and other surfaces that can be in contact with dust, and use "dust-tight" or "dust-proof" enclosures to limit the entry of dust. For electrical equipment used in an environment where flammable gases and flammable dust may appear simultaneously or separately, some additional protective measures are required. When electrical equipment must comply with other environmental conditions, such as waterproof and anti-corrosion and other protection methods are required, the protection method should not adversely affect the integrity of the enclosure. This section does not apply to those pyrotechnic dusts or pyrophoric substances that do not require atmospheric oxygen to burn. This section does not apply to electrical equipment for underground coal mines and coal mine ground installations where methane and/or combustible dust pose a hazard. This section does not consider the hazards caused by flammable or toxic gases volatilized from dust.

GB 12476.5-2013 Referenced Document

• GB 12476.1-2013 Electrical apparatus for use in the presence of combustible dust.Part 1:General requirements
• GB 4208-2008 Degrees of protection provided by enclosure(IP code)

GB 12476.5-2013 history

• 2021 GB/T 3836.31-2021 Explosive atmospheres—Part 31: Equipment dust ignition protection by enclosure “t”
• 2013 GB 12476.5-2013 Electrical apparatus for use in the presence of combustible dust.Part 5: Protection by enclosures "tD"

GB 12476.5-2013 Electrical apparatus for use in the presence of combustible dust.Part 5: Protection by enclosures "tD" was changed to GB/T 3836.31-2021 Explosive atmospheres—Part 31: Equipment dust ignition protection by enclosure “t”.

GB 12476.5-2013 -All Parts