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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.

SearchClear

Article

Insulation resistance testing: How low can megohms go?

  • July 2011
  • Number of views: 7067
  • Article rating:

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

Note: This "encore" technical article first appeared in the September 2004 issue of Currents.

ll of us in the electrical appara­tus service industry test the winding ground insulation resistance of ma­chines such as motors and generators. A frequent question is: What is the minimum acceptable megohm (M.) value for this winding? The good news is that there is a standard that identi­fies minimum values for insulation resistance of rotating machines. 

That standard is the “IEEE Recom­mended Practice for Testing Insulation Resistance of Rotating Machinery,” IEEE Std 43-2000. The EASA “Recom­mended Practice For The Repair Of Rotating Electrical Apparatus,” ANSI/EASA AR 100-2010, uses IEEE 43 for its insulation resistance test references. Note that IEEE 43 only applies to rotat­ing machinery. There is no equivalent standard for non-rotating electrical machinery such as transformers. In this article we will delve into determining minimum insulation resistance for rotating electrical machinery. 

Available Downloads



ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100
  • Section 4: Testing

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 7: Electrical Testing

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
  • Section 12: Test & Inspection Procedures

Principles of Medium & Large AC Motors (IEC Standards)
  • Section 12: Test & Inspection Procedures

Categories: Testing, Motor testing
Tags: Insulation resistance (IR) test
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