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EASA Technical Manual

  • September 2022
  • Number of views: 22469
  • Article rating: 3.1
FREE for Members of EASA

Revised September 2022!
EASA's most comprehensive technical document is available FREE to EASA members. Download the complete manual or just the sections you're interested in.

High-Potential Testing of AC Windings

  • December 2019
  • Number of views: 6699
  • Article rating: No rating
Webinar recording

High-potential testing is routinely used to assess the ground insulation of AC stator windings in-process, after completion of a rewind and post-delivery. This webinar covers types of high-potential tests, testing standards, evaluating test results, and more.

Limiting end float of a sleeve bearing machine

  • April 2019
  • Number of views: 7361
  • Article rating: No rating

There are applications where the end float inherent to a sleeve bearing machine is not desirable, and some means of limiting the axial movement is needed. This is usually accomplished by selecting an appropriate coupling and relying on the driven equipment to prevent axial movement of the motor shaft. 

The gear-hub style of coupling can be end-float limited by installing a “hockey-puck” spacer. The grid-style coupling can be limited by spacers inserted on both sides. 

Regardless of coupling style, unless the driven equipment has some internal means to limit end float, there are circumstances where some external means of preventing axial movement is needed.

Consideraciones para la resolución de los equipos de prueba & medida (M&TE)

  • November 2018
  • Number of views: 5569
  • Article rating: 5.0
FREE for Members of EASA

La precisión y exactitud de los equipos de prueba & medida (M&TE) han sido tratadas en artículos previos de Currents (noviembre y diciembre de 2014). Un tema relacionado que no fue cubierto en dichos artículos es la resolución. Este artículo cubrirá ese tema.

A closer look at winding conversions by reconnection

  • May 2018
  • Number of views: 4578
  • Article rating: No rating

When a customer requests a motor be rewound for a new set of conditions, that is typically what we in the service center industry provide them. However, there are occasions where the customer request may be fulfilled by reconnection; in some cases, this is done simply by revising the motor nameplate data. The purpose of this article is to identify and explain some of these scenarios.

Una mirada más detallada a las conversiones de bobinados por reconexión

  • May 2018
  • Number of views: 3029
  • Article rating: No rating

Cuando un cliente solicita que un motor sea rebobinado para una nueva serie de condiciones, esto es lo que nosotros habitualmente le proporcionamos en la industria de los centros de servicio. No obstante, existen ocasiones en las que lo requerido por el cliente se puede llevar a cabo por reconexión; en algunos casos, esto se hace simplemente revisando los datos de placa del motor. El propósito de este artículo es identificar y explicar algunos de estos escenarios.

Logrando una alineación adecuada detectando y corrigiendo el pie suave

  • May 2016
  • Number of views: 9605
  • Article rating: No rating

Realizar una correcta alineación de las máquinas acopladas de forma directa es un elemento esencial para garantizar la confiabilidad de operación de una máquina nueva o reparada (motor, bomba, caja de engranajes, etc.). Uno de los impedimentos comunes para lograr una alineación adecuada y un correcto funcionamiento, es el denominado  "pie suave".

Share your 'quick tips' for efficiency with other EASA members

  • November 1999
  • Number of views: 2250
  • Article rating: No rating

Rapid changes in technology can mean better ways of doing things. In the EASA spirit of cooperation, we're asking for proven tips from members. Do you have a shortcut or tip for doing a job better? Is there a new tool that works particularly well for some motor-shop task? Share your knowledge! To kick things off, here are a few "Quick Tips" using technology that has been around for as long as I can remember...

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 September 2022
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.