Previous in Forum: X mers rating?   Next in Forum: curent transformer
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
Rate this Comments: Nested
RAMANVADIVELU
Participant

Join Date: Mar 2009
Posts: 2

electrical engineering

04/04/2009 11:40 AM

WHERE SHOULD I USE FOUR POLE BREAKERS.IF I USE THREE POLE BREAKERS IN THAT CONDITION WHAT WILL HAPPEN?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".
2
jangkly
Associate

Join Date: Apr 2008
Location: 66°N (almost)
Posts: 46
Good Answers: 1
#1

Re: electrical engineering

04/04/2009 6:35 PM

Hi

Depending on your country´s regulations and situations.

Normally you use 4pole CB´s for 3phases and neutral. Usually it is not nessesary to disconnect the nutral (blue wire), but in some systems it is required for security reasons. Keep in mind that if you make it possible to disconnect neutral via fx. breaker or switch then you have to disconnect all phases simultaniously with it, in that case you need 4pole CB It should not be possible to disconnect neutral without disconnecting the phases.

Regards GJA

__________________
 It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary. Winston Churchill
Register to Reply Good Answer (Score 2)
No more Good Answers.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Previous in Forum: X mers rating?   Next in Forum: curent transformer

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 (82 right now)
Show Members
Advertisement