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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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Questions?

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

EASA calling for public comments on BSR/EASA AR100-202x

Recommended Practice for the Repair of Rotating Electrical Apparatus (revision of ANSI/EASA AR100-2020)

  • October 2025
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The following was posted in ANSI Standards Action on October 3, 2025.

EASA (Electrical Apparatus Service Association)
1331 Baur Road, St. Louis, MO 63132 | mhowell@easa.com

Revision BSR/EASA AR100-202x, Recommended Practice for the Repair of Rotating Electrical Apparatus (revision of ANSI/EASA AR100-2020)

This document describes record keeping, tests, analysis, and general guidelines for the repair of induction, synchronous, and direct current rotating electrical apparatus. It is not intended to take the place of the customer’s or the machine manufacturer’s specific instructions or specifications or specific accepted and applicable industry standards or recommended practices.

Single copy price: $60.00 (Non-member); $20.00 (member); online dowload free to anyone.

Obtain an electronic copy from: easainfo@easa.com Send comments (copy psa@ansi.org) to: Mike Howell (mhowell@easa.com)



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EASA Rewind Study cover

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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