Follow Us
Page 2 of 2 FirstFirst 12
Results 11 to 11 of 11

Megger testing technique questions

 Jump to latest post
Page 2 of 2 FirstFirst 12
  1. michaellabeit is offline Junior Member Pro Subscriber
    Join Date
    Apr 2020
    I listened in on a Megger webinar on insulation resistance testing by Jo Jewett, one of Megger's senior engineers. He said that the polarity doesn't matter for IR tests. Moreover, Megger's A Guide To Diagnostic Insulation Testing Above 1 kV states the following on page 6:

    "With modern insulating materials there is little, if any, difference in the reading obtained, regardless of which way the terminals are connected. However, on older insulation, a little known phenomenon called electroendosmosis causes the lower reading to be obtained with the positive terminal connected to the grounded side of the insulation being tested."

Page 2 of 2 FirstFirst 12

Login or register to leave a reply!

Share this thread

Related Topics

  1. Replies: 7
    Last Post: August 3, 2017, 03:38 PM
  2. Help me understand how a megger works
    By Sanjayo in forum Electrical Testing Talk
    Replies: 1
    Last Post: April 23, 2016, 11:35 AM
  3. Megger Offers Free Testing Tactics Webinar Series
    By testguy in forum News and Announcements
    Replies: 0
    Last Post: November 1, 2014, 06:00 AM

Tags for this Thread

Related Content

Follow us

Explore TestGuy

NETA Certification Training

NICET Electrical Power Testing

Help and Support