ANSI/EASA AR100-2020 cover

ANSI/EASA Standard AR100-2020
ANSI/EASA AR100-2020: Recommended Practice for the Repair of Rotating Electrical Apparatus is a must-have guide to the repair of rotating electrical machines. It establishes recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

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For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

Field testing & inspection of 3-phase squirrel cage motors

September 2019
Number of views: 14982
Article rating: 5.0

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

This article addresses electrical testing and inspection of installed 3-phase squirrel cage motors. The main purposes of testing installed electric motors are condition assessment for continued service or to diagnose suspected faults. The emphasis here will be on diagnostic electrical testing and interpretation, as well as physical inspection key points. Note: Most of the tests and inspections described in this article can also be performed on 3-phase wound rotor motors, and induction and synchronous generators.

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ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100

Section 4: Testing

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual

Section 2: AC Machines
Section 7: Electrical Testing

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)

Section 12: Test & Inspection Procedures

Principles of Medium & Large AC Motors (IEC Standards)

Section 12: Test & Inspection Procedures
Section 15: Synchronous Machines

Categories: AC motors, Alternators/generators, Testing, Motor testing

Tags: Motor testing Generators Field service

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The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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