IEEE ANSI/IEEE 620-1981

Current Revision
IEEE Trial Use Guide for Construction and Interpretation of Thermal Limit Curves for Squirrel-Cage Motors Over 500 hp

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IEEE Trial Use Guide for Construction and Interpretation of Thermal Limit Curves for Squirrel-Cage Motors Over 500 hp

PUBLISH DATE 1981
PAGES 8
New IEEE Standard - Superseded.
This guide defines thermal limit curves, recommends a standard procedure for construction of the curves, and provides the definitions and information necessary t o properly use these curves. 2.2 The guide also describes thermal limit curves for large squirrel-cage motors defined as those motor ratings built in frames larger than the frame normally used for 500hp , 1800r/min motors.
The purpose of this guide is to assist in a uniform understanding of the construction, interpretation, and use of motor thermal limit curves.
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