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Resource Library

Opportunities in the Diesel Locomotive Repair Industry

  • March 2021
  • Number of views: 973
  • Article rating: No rating

As EASA members, we have the technical skills, knowledge and support to do almost anything in the electromechanical repair industry. Rail work is no different.

Field testing & inspection of 3-phase squirrel cage motors

  • September 2019
  • Number of views: 3686
  • Article rating: 5.0

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.

Inspección y pruebas in situ de motores trifásicos jaula de ardilla

  • September 2019
  • Number of views: 2519
  • Article rating: No rating

Este artículo cubre las pruebas eléctricas y la inspección de motores trifásicos jaula de ardilla que han sido instalados. Los principales objetivos al probar los motores en el sitio de trabajo son: Evaluar su condición para garantizar su funcionamiento continuo odiagnosticar presuntos fallos. Aquíharemos énfasis en las pruebas y enla interpretación de los resultados, asícomo también, en la inspección física de los puntos clave. Nota: La mayoría de las prue­bas descritas también se pueden realizar a los motores con rotor bobinado y en los gen­eradores sincrónicos y de inducción. 

Troubleshooting AC Generators and Alternators

  • June 2014
  • Number of views: 1053
  • Article rating: No rating
Convention presentation

This paper, presented at the 2014 EASA Convention, covers theory of operation, inspection, operation, and troubleshooting tips for AC generators.

DC generator woes: Why won't it generate?

  • October 2006
  • Number of views: 1192
  • Article rating: No rating

There are a number of different types of DC generators: shunt, series and compound, each of which can be separately or self-excited. A DC generator is built and designed exactly the same as a DC motor,and can be run as such. Regardless of the type, there are a number of reasons why a generator won't produce the correct voltage, or any voltage at all.

Potential problems when repairing induction wind generators

  • August 2004
  • Number of views: 1429
  • Article rating: 4.0

The purpose of this article is to provide a simplified explanation of how induction generators work, and what problems we might expect when repairing them. We owe it to our customers to help them avoid these pitfalls. If not, a generator may come back as an unjustified warranty claim.

Understanding alternating current generators

  • September 2003
  • Number of views: 1261
  • Article rating: No rating

An alternator is a converter: It converts mechanical energy into alternating electrical current. It's a generator: It generates (creates) alternating electrical current out of mechanical energy. How's it doing that? It's magic! Nah, not at all. This article will show you how.

The case of the vibrating generators

  • September 1998
  • Number of views: 1087
  • Article rating: 5.0

The case study in this article demonstrates that EASA members have great opportunities to develop and improve customer relationships by helping them solve their application problems.

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



EASA/AEMT Rewind Study

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.


ANSI/EASA AR100-2020

ANSI/EASA AR100-2015 cover

Recommended Practice for the Repair of Rotating Electrical Apparatus
This 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.



EASA Technical Manual

EASA Technical Manual cover

Revised May 2021
The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.