Polarization Index and Dielectric Absorption Ratio: Which Is “Better?” - Private Webinars - EASA | The Electro•Mechanical Authority
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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

$500 for EASA Chapters/Regions
$800 for member companies
$1000 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

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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.

The list below is a sampling of topics that could be made available to your group. Any webinar previously presented by EASA staff could potentially be made available for your meeting!
See other topics presented previously.

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Polarization Index and Dielectric Absorption Ratio: Which Is “Better?”

  • June 2026
  • Number of views: 42
  • Article rating:

Event date: 1/13/2027 12:00 PM - 12:45 PM Export event

AKARD COMMUTATOR of TENNESSEE (ACT)

Presented by Chuck Yung
EASA Senior Technical Support Specialist

The PI test is well known and often requested by our customers. This webinar explains the PI ratio and the less-well-known DAR and describes where they are useful and where they are not. The PI ratio is a variant of a DAR, using a 10-minute / 1-minute ratio. It is well- regarded for form wound machines. Too many customers want to apply the PI test to DC machines and random windings. This webinar will explain why that is not a valid test for some windings and explain the advantages of the DAR (1 minute / 30 second) test. 

Topic includes: 

  • What is a PI test, and how does it work? 
  • Why is winding capacitance important? 
  • What is the difference between the PI and DAR? 
  • What types of windings is the PI ratio used for? 
  • What types of windings is the PI ratio not suitable for? 

Target Audience: Technicians, management and sales personnel. It is especially relevant for field service and in-shop technicians.



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