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Resource Library

Whether you're seeking technical, management, sales or marketing help, EASA's extensive resource library is your main place to find articles, books, booklets, forms, webinar recordings, training films, products and more for your service center.


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Key EASA Publications

The 2019 Rewind Study

2019 EASA/AEMT Rewind Study coverThe Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors

Published: January 2021

In response to various opinions about the feasibility of maintaining motor efficiency during repair, including replacement of the stator winding, the Electrical Apparatus Service Association (EASA) and the Association of Electrical and Mechanical Trades (AEMT) conducted two comprehensive rewind studies using third-party testing laboratories. This study was a follow up to a similar study conducted 2003. This valuable publication explains the findings:

The 2019 study reaffirms the results of the 2003 study.
Motors can be repaired without reducing efficiency.

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Good Practice Guide To Maintain Motor Efficiency

Good Practice Guide - 2019 Rewind Study - coverPublished: January 2021

The original 2003 rewind study good practice guide has been editorially updated, with no substantive changes to any of the good practices. Intended primarily for service center personnel, the guide which is now an independent document and not part of the complete EASA/AEMT rewind study report, outlines the good practice repair methods used to achieve the results given in both studies. It contains repair tips, relevant motor terminology, and information about sources of losses in induction motors that affect efficiency.

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ANSI/EASA AR100-2020: Recommended Practice for the Repair of Rotating Electrical Apparatus

ANSI/EASA AR100-2020 coverPublished: September 2020

ANSI/EASA AR100 “Recommended Practice for the Repair of Rotating Electrical Apparatus”is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

The scope of 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.

ANSI recognizes only one standard on a topic; therefore, the EASA Recommended Practice is the standard for repair of rotating electrical apparatus.

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EASA Technical Manual

The EASA Technical Manual, EASA's most comprehensive technical document, pulls from the knowledge and experience of EASA's technical support staff, members and industry leaders. At more than 900 pages, leverage this resource for your service center technicians, either on your computer or on your bookshelf. 

The EASA Technical Manual is available FREE to members as downloadable PDFs of the entire manual or individual sections. Printed copies are available for sale.  

Revised March 2020 | 63 mb | Number of pages: 916

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Internal Connection Diagrams for Three-Phase Electric Motors

EASA Internal Connection Diagrams for Three-Phase Electric MotorsEASA members can download a PDF of Internal Connection Diagrams for FREE. Use the link below for the free PDF.

This edition of EASA Internal Connection Diagrams contains significantly more connections than the previous version (1982), as well as improved templates for drawing connection diagrams. It provides internal connection diagrams for three-phase windings. It can be used with either concentric or lap windings. It also covers all possible parallels; wye and delta, 2 - 48 poles; part windings; two-speed windings; wye-delta and consequent-pole connections, 2 - 48 poles. It includes PAM connections, as well as triple- and quadruple-rated connections.

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EASA AR200: Guide for the Repair of Power and Distribution Transformers cover

EASA AR200: Guide for the Repair of Power and Distribution Transformers cover

Published: October 2011

This document establishes guidelines for each step of the repair of power transformers, describing record keeping, tests, analysis, and general guidelines for the repair of power transformers.

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Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - coverThis 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.

This booklet covers topics such as:

  • Installation, startup and baseline information
  • Operational monitoring and maintenance
  • Motor and baseline installation data
  • How to read a motor nameplate
  • Motor storage recommendations

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Failures in Three-Phase Stator Windings

The life of a three-phase stator winding can be shortened dramatically when the motor is exposed to unfavorable operating conditions — electrical, mechanical or environmental. The winding failures shown are typical of what can happen is such circumstances. You can also order copies of the brochure detailing these failures. 

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Electrical Handbook

Electrical Engineering Pocket Handbook

This 118-page booklet has been EASA's best selling product and makes the perfect reference and marketing tool. EASA members can also imprint their company logo!

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Mechanical Handbook

Mechanical Reference Handbook

This booklet is a reference tool for all things mechanical in a motor service center. Give it to your customers as a marketing tool. EASA members can also imprint their company logo!

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Employee Safety Guide

Employee Safety Guide

EASA’s pocket-sized Employee Safety Guide presents common-sense precautions and practical work rules to help EASA member firms achieve a higher level of employee safety.

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