GB/T 997-2022: Classification of types of construction, mounting arrangements and terminal box position (IM Code) for rotating electrical machines

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Scope

This Document specifies the IM Code, a classification of types of construction, mounting
arrangements and the terminal box position of rotating electrical machines.
Two systems of classification are provided as follows:
– Code I (see Clause 4): An alpha-numeric designation applicable to machines with
endshield bearing(s) and only one shaft extension.
– Code II (see Clause 5): An all-numeric designation applicable to a wider range of types of
machines including types covered by Code I.
The type of machine not covered by Code II is fully described in words.
The relationship between Code I and Code II is given in Annex A.

Basic Data

Standard ID	GB/T 997-2022 (GB/T997-2022)
Description (Translated English)	Classification of types of construction, mounting arrangements and terminal box position (IM Code) for rotating electrical machines
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K20
Classification of International Standard	29.160.01
Word Count Estimation	25,284
Date of Issue	2022-10-12
Date of Implementation	2023-05-01
Older Standard (superseded by this standard)	GB/T 997-2008
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration