Previous in Forum: Modelling overcurrent protection   Next in Forum: What's the Difference Between Electrical Drawings and Electrical Diagrams?
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
4 comments
Rate Comments: Nested
Anonymous Poster

under/over voltage protection

04/09/2009 4:42 PM

hi all

i want to make under/over voltage protection for a load of about 50 amps ''house''. the main breaker is 63 amps 2pole.

the supply is 220v live.neutral

when i checked on the website i found under/over voltage relay but to use it i need breaker 63amps 2pole with uv coil, so the relay will trip off the main breaker by cutting the supply of the uv coil.

please advice if any body knows where i can find 2,3pole 63amps breaker with uv coil 220v.

your help is highly appreciated.
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#1

Re: under/over voltage protection

04/09/2009 4:59 PM

How about this one.

http://www.ab.com/en/epub/catalogs/12768/229240/229248/229334/229399/

Google lists a number of sites
Reply
Akihito Shigeno
Power-User

Join Date: Oct 2008
Location: Jakarta Indonesia
Posts: 123
Good Answers: 7
#2

Re: under/over voltage protection

04/09/2009 9:24 PM

Dear all,

I have just checked in ABB Tmax catalog.

They have 63A MCCB with undervoltage release - UVR as an accessory.

220-240VAC/220-250VDC version is available.

Regards

__________________
 Akihito Shigeno @ JGC-Indonesia
Reply
harry potter
Power-User

Join Date: Nov 2008
Location: India
Posts: 333
Good Answers: 6
#3

Re: under/over voltage protection

04/10/2009 7:50 AM

You probably require SHUNT trip coil with breaker. If you have uv / ov relay to sense.

try -

www.lntebg.com / schneider / hagger / legrand etc....

__________________
 Exploring the Science of Electricity
Reply
JRaef
Guru
United States - Member - New Member Engineering Fields - Power Engineering - New Member

Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
Posts: 4665
Good Answers: 804
#4
In reply to #3

Re: under/over voltage protection

04/10/2009 6:58 PM

That's right, use a Shunt Trip, not an Under Voltage Trip accessory. If you use the UV trip, EVERY TIME the utility power fails, you will be required to manually reset the main breaker.

If this is a residential application, your 63A main breaker is most likely an MCB, not what the ABB T3 frame breaker is. If so, you must match the same manufacturer as what you have for all of the rest of your breakers. Every mfr I know of offers ST accessories for their products, so find out what you have and ask them for the Shunt Trip accessory.

__________________
 ** All I every really wanted to be, was... A LUMBERJACK!.**
Reply
Reply to Forum Thread
Have a Different Question?
4 comments
Copy to Clipboard

Users who posted comments:

Akihito Shigeno (1); harry potter (1); JRaef (1); wareagle (1)

Previous in Forum: Modelling overcurrent protection   Next in Forum: What's the Difference Between Electrical Drawings and Electrical Diagrams?

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 (78 right now)
Show Members
Advertisement