GB/T 4942-2021
Degrees of protection provided by the integral design of rotating electrical machines (IP code)—Classification (English Version)

Standard No.

GB/T 4942-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 4942-2021

Replace

GB/T 4942.1-2006

Scope

This document is applicable to the classification of the degree of protection of enclosures for rotating electrical machines. This document specifies the requirements for the protection of the enclosure. The enclosure should meet the requirements for use in all aspects, and the material and processing technology of the enclosure should be able to ensure that its performance meets the requirements of this document under normal use conditions. This document does not specify the degree of protection of motors against mechanical damage or against conditions such as humidity (caused, for example, by condensation), corrosive gases, mold, insect infestation, etc. This document also applies to explosion-proof motors, but does not specify the type of explosion protection for motors operating in explosive gas (dust, gas) environments, which are specified in the IEC60079 series of documents. In some cases (eg agricultural or household appliances), more extensive precautions may be specified to avoid accidental or intentional access. This document specifies the standard levels of protection of enclosures for rotating electrical machines with respect to: a) protection against human access to or access to live parts inside the enclosure and access to rotating parts inside the enclosure (except smooth rotating shafts and similar parts), and protection against the entry of solid foreign objects into the motor ; b) prevent harmful effects caused by water entering the motor; c) prevent harmful effects caused by dust entering the motor. This document specifies the mark of the degree of protection, as well as the test for checking that the motor meets the requirements of this document.

GB/T 4942-2021 Referenced Document

• IEC 60034-6 Rotating electrical machines; part 6: methods of cooling (IC code)

GB/T 4942-2021 history

• 2021 GB/T 4942-2021 Degrees of protection provided by the integral design of rotating electrical machines (IP code)—Classification
• 2006 GB/T 4942.1-2006 Degrees of protection provided by the integral design of rotating electrical machined (IP code) - Classification
• 2001 GB/T 4942.1-2001 Classification of degrees of protection provided by enclosures of rotating electrical machines (IP code)
• 1985 GB/T 4942.1-1985 Motor enclosure protection classification