Results 1 to 5 of 5

Thread: Testers

  1. #1
    Bronze Member
    Join Date
    Mar 2018
    Location
    Western Cape
    Posts
    120
    Thanks
    11
    Thanked 15 Times in 14 Posts

    Testers

    Greetings All

    I recently purchase a leakage clamp tester and I am very happy I did when I have an earth leakage tripping intermittently I can now find the fault,

    My question is on a single phase earth leakage I clamp the tester around the live and neutral to measure the difference in current.

    How would you test a three phase earth leakage?

    If the phases aren't balanced then you will get a current flow surely.

    Kind Regards

  2. #2
    Diamond Member Justloadit's Avatar
    Join Date
    Nov 2010
    Location
    Johannesburg
    Posts
    3,475
    Thanks
    134
    Thanked 694 Times in 592 Posts
    Blog Entries
    1
    Same as with single phase.
    Place the clamp across all three phases and Neutral.
    Any leakage will be noted by the instrument.
    At the end of the day, whether the Phases are balanced or not with respect to each other, but with respect to Neutral, all currents must equal zero when there is no leakage.
    Victor - Knowledge is a blessing or a curse, your current circumstances make you decide!
    Solar pumping, Solar Geyser & Solar Security lighting solutions - www.microsolve.co.za

  3. #3
    Bronze Member
    Join Date
    Mar 2018
    Location
    Western Cape
    Posts
    120
    Thanks
    11
    Thanked 15 Times in 14 Posts
    Morning Justloadit

    Thank you for this every electrician should have one of these testers.

  4. #4
    Diamond Member
    Join Date
    Apr 2010
    Location
    planet earth
    Posts
    3,943
    Thanks
    153
    Thanked 317 Times in 287 Posts
    I measure the leakage currnet on the earth wire ... it is not easy to get the live and neutral togehter due to space and other restrictions.

    sometimes it is a build up of leakage current causing the earth leakage to trip by measuring the leakage current on the earth wire you can identify the level of leakage per circuit.

    We had a huge leakage tripping problem at a site in KZN ... I found the cause of the problem wasnt the equipment ...but rather the lack of sufficient earth ... the contractor doing work under the building had been cutting and removing pieces of the earth grid day by day until eventually it became a tripping issue.

    Wise choice investing in leakage tester ... there are so many uses for this tester ... for example when you cant use an insulation resistance tester due to sensitive electronic equipment ... it pays for itself.
    Comments are based on opinion...not always facts....that's why people use an alias.

  5. #5
    Diamond Member AndyD's Avatar
    Join Date
    Jan 2010
    Location
    Cape Town
    Posts
    4,923
    Thanks
    576
    Thanked 934 Times in 755 Posts
    Congratulations on your new tester Sean...and you're right, every electrician should have one.

    Quote Originally Posted by ians View Post
    I measure the leakage currnet on the earth wire ... it is not easy to get the live and neutral togehter due to space and other restrictions.

    sometimes it is a build up of leakage current causing the earth leakage to trip by measuring the leakage current on the earth wire you can identify the level of leakage per circuit.
    In certain instances it is more convenient to measure on the CPC /earth wire but if the leakage current is finding its way to earth down a parallel path then it won't give accurate results. I'd recommend using it around the line conductors for best results.
    _______________________________________________

    _______________________________________________

Similar Threads

  1. Multifunction Testers
    By IMGREG in forum Electrical Contracting Industry Forum
    Replies: 4
    Last Post: 28-Jan-18, 11:29 PM
  2. [Question] Certificate of Compliance Testers
    By robbardo in forum Electrical Contracting Industry Forum
    Replies: 1
    Last Post: 05-Feb-17, 11:00 PM
  3. Sending testers in for repairs
    By joshthejew in forum Electrical Contracting Industry Forum
    Replies: 9
    Last Post: 05-Apr-16, 06:02 PM
  4. Electrical Testers
    By paulbloggs in forum Electrical Contracting Industry Forum
    Replies: 5
    Last Post: 27-Jan-16, 12:33 PM
  5. Electrical testers
    By Yuri in forum Electrical Contracting Industry Forum
    Replies: 13
    Last Post: 08-Sep-14, 02:00 PM

Did you like this article? Share it with your favourite social network.

Did you like this article? Share it with your favourite social network.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •