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Fact or Myth: Common Misconceptions About Motors

  • January 2021
  • Number of views: 2544
  • Article rating: 3.7

Here is a random collection of some relatively common misconceptions about three-phase squirrel cage motor performance characteristics.

Mito o Realidad: Conceptos Errados Comunes Sobre Motores Eléctricos

  • January 2021
  • Number of views: 2148
  • Article rating: No rating

Aquí tenemos una colección de algunos de los conceptos errados más comunes acerca de las características de desempeño de los motores eléctricos tipo jaula.

Interpreting Winding Insulation Power Factor Test Results

  • July 2013
  • Number of views: 1038
  • Article rating: No rating
Convention presentation

This paper, presented at the 2013 EASA Convention, will examine Power Factor Tip-up and Partial discharge testing to assess stator winding conditions for motors rated 2300 V and above. Both tests will be evaluated for: effectiveness; which windings/types of machines the test is effective; set-up; interpretation and limitations.

Power factor correction: Why it is important

  • July 2004
  • Number of views: 803
  • Article rating: No rating

In large office buildings or industrial settings, the power factor should be maintained close to unity. The benefits in doing so are as follows: The losses in the cables and other equipment can be reduced because the current flow through them is reduced. This, in turn, reduces heating, and hence aging. In addition, the requirements for circuit interrupting devices are less onerous. So smaller or less expensive ones can be used. Finally, energy costs can be reduced by eliminating or reducing utility surcharges. Note that not all utilities penalize the user for low power factor.

Power factor: What it is, why it's important

  • January 2002
  • Number of views: 604
  • Article rating: No rating

In electric motors, power factor varies with load (although not directly). A motor running without a load will have a very low power factor, whereas at full load, the power factor may be relatively high. A facility that has a very low power factor in the total system may be charged a penalty by the power company for "borrowing" the power without fully using it. This is because more current is being transmitted than is actually doing any useful work.

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.