Previous in Forum: Transformers Levels   Next in Forum: Transformer BDV Test
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
paramasivan4u
Active Contributor

Join Date: Oct 2006
Posts: 17

Earth Leakage Trip

12/19/2008 7:05 AM

we are using ELCB 3A rating with 300/3A CT.The connected load are both 3 phases and single phases.The CT primary are all 3 phases and Nuetral.The problem is when CT secondary connected to ELCB , it trip the breaker even all 3 phases load are diconnected.Can you anybody give solution for the probem.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
SABNAVEES
Active Contributor

Join Date: Nov 2008
Posts: 23
#1

Re: Earth Leakage Trip

12/20/2008 3:36 AM

It means there is circulating current in the neutral. This will happen when generators are running in parallel & in stead of one,more than one neutrals are connected to earth. Or otherwise the neutral grounding may not be proper.
Register to Reply
paramasivan4u
Active Contributor

Join Date: Oct 2006
Posts: 17
#2
In reply to #1

Re: Earth Leakage Trip

12/20/2008 6:35 AM

Thank you, we solved the problem.one of the outgoing feeder cable neutral shorted with ground,Some other circuit current flow to the neutral to ground.After correct the neutral of the feeder, no Earth leakage trip.Thanks for your idea.
Register to Reply
biswanath.das
Power-User

Join Date: Oct 2006
Location: Kolkata, India
Posts: 447
#3
In reply to #2

Re: Earth Leakage Trip

12/30/2008 6:23 AM

I will suggest to check setting of ELCB, if its low say 20mA it will trip due to very low leakage or circulating current. It could be 50mA or as per local By-law.

Thanks

__________________
 BNDas
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

biswanath.das (1); paramasivan4u (1); SABNAVEES (1)

Previous in Forum: Transformers Levels   Next in Forum: Transformer BDV Test

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (84 right now)
Show Members
Advertisement