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How to schedule

To schedule private education for your group, contact:

Dale Shuter, CMP
Meetings & Expositions Manager

+1 314 993 2220, ext. 3335
dshuter@easa.com

1 hour of training

$300 for EASA Chapters/Regions
$400 for member companies
$800 for non-members

How a webinar works

All EASA private webinars are live events in which the audio and video are streamed to your computer over the Internet. Prior to the program, you will receive a web link to join the meeting. 

The presentation portion of the webinar will last about 45 minutes, followed by about 15 minutes of questions and answers.

Requirements

  • Internet connection
  • Computer with audio input (microphone) and audio output (speakers) appropriate for your size group
  • TV or projector/screen

Zoom logo

The Zoom webinar service EASA uses will ask to install a small plugin. Your computer must be configured to allow this in order to have full functionality. Please check with your IT department or company's security policy prior to scheduling a private webinar.

Private Webinars

EASA's private webinars are an inexpensive way to bring an EASA engineer into your service center, place of business or group meeting without incurring travel expenses or lost production time.

Booklet

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors

2019 Rewind Study

  • January 2021
  • Number of views: 18297
  • Article rating:

This valuable publication explains the findings of a major study that analyzed the impact of repair/rewinding on the energy efficiency of Premium Efficiency/IE3 electric motors. This study was a follow up to a 2003 study.

The 2019 study reaffirms the results of the 2003 study.

The Effect of Repair/Rewinding on Premium Efficiency/IE3 MotorsAbstract
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.

The results of the first study, which were published in 2003 (see Part 2 on Page 2-1 of this document), clearly showed that the efficiency of energy efficient and IE2 motors ranging from 7.5 hp to 200 hp (5.5 kW to 150 kW) can be maintained (and sometimes improved) if the stator is rewound using established good practice procedures.

The increasing use of premium efficient motors mandated by various countries led to a second rewind study in 2019, this time to determine if the efficiency of premium efficiency and IE3 motors can be maintained when they are rewound using the good practices described in the 2003 rewind study and ANSI/EASA AR100-2015: Recommended Practice for the Repair of Electrical Apparatus.

As with the 2003 study, the results of the 2019 rewind study that follow clearly show the answer is YES–with the average efficiency change for the entire test group falling within the range of accuracy for the test method (± 0.2%). In several instances, motor efficiency actually improved.

Overview of the Table of Contents

  • Part 1: 2019 Rewind Study–The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
    • Objective
    • Products evaluated
    • Standards for evaluating losses
    • Third-party testing protocol
    • Results of efficiency tests on rewound motors
    • Conclusion
  • Part 2: 2003 Rewind Study – The Effect of Repair/Rewinding on Motor Efficiency
    • Objectives
    • Products evaluated
    • Standards for evaluating losses
    • Third-party testing protocol
    • IEEE Std. 12B test method: Input - output with loss segregation
    • Core loss testing
    • Results of efficiency tests on rewound motors
    • Significance of test results
    • Conclusion
Download a PDF of the complete study or the Executive Summary
for free using the links below.
Printed copies are also available in EASA's Online Store.

 

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