Member Login

Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

3 Phase Earth Leakage Test

3 Phase Earth Leakage Test

Is there somebody that can help me with a operating prosedure to do 3 phase earth leakage tests on a 525v system.

RE: 3 Phase Earth Leakage Test

What is the objective?

Determine the average quality of the system's insulation? or
Measure the actual capacitive leakage current for sizing neutral groudnign resistors?

An insulation resistance measurement could be done on a de-energized system by jumpering  three phases together, removing any connection to earth and apply 1,000 VDC  with an insulation resistance test instrument.  (Commonly called a Meggar in North America).  The result will be the combined insulation resistance to ground of the system that was connected at the time of the test.  It would not provide much useful information about the condition of the individual equipment items: wires, transformers, panels, etc.

I don't recommend trying these test unless you really understand the risks.  Besides the obvious risk of working on electrical equipment, some devices connected to your system might get ruined by a DC overpotential test.

Capacitive charging current measurements can be done several ways on energized systems. Let us know what you are trying to do.

RE: 3 Phase Earth Leakage Test

Hi there,
Sorry for the late replay, It came under my attention that the electricians do not know how to do the earth leakage test.
I need to draw up a one page prosedure on how to test and proof the operation off the earth leakage.
Yes I agree with you that to do a Megger test on the cable and motor as is de-energised and safe.
Will let you know on what we desided in South Africa.

Red Flag This Post

Please let us know here why the post below is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close