Previous in Forum: How to Decide the Suitable MCB Size?   Next in Forum: AC or DC Rotor Drop Test Problem
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
11 comments
Rating: Comments: Nested
cpshajeer1988
Member

Join Date: Oct 2012
Posts: 5

Full Details for Designing Capacitor Bank for a System

10/18/2012 1:46 AM

can any body give the full details that how to calculate the capacitor bank for a system
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Joshi
Guru

Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#1

Re: full details for designing capacitor bank for a system

10/18/2012 2:28 AM

"capacitor bank for a system"

What system?
Register to Reply
cpshajeer1988
Member

Join Date: Oct 2012
Posts: 5
#3
In reply to #1

Re: full details for designing capacitor bank for a system

10/18/2012 3:26 AM

for a 250 kw load
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#4
In reply to #3

Re: full details for designing capacitor bank for a system

10/18/2012 4:25 AM

Is there anything else the forum needs to know before carrying out the design?

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#11
In reply to #3

Re: full details for designing capacitor bank for a system

10/19/2012 1:21 AM

What is 250kW-is it a single motor,many kinds of loads(mixed),diversity,load factor etc?. Best solution is to invite a PFC contractor(or Energy management Co) to connect a datalogger to your mains and record all parameters(V,I,kW,kVA,kVAr,pf,harmonics etc) for a 24hr period and decide/recommend a solution.

__________________
 pnaban
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2

Re: full details for designing capacitor bank for a system

10/18/2012 3:15 AM

Yes. Capacitor bank designers can. Try ABB?

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Anonymous Poster #1
#5

Re: full details for designing capacitor bank for a system

10/18/2012 4:38 AM

http://www.nppowersolutions.com/services/power-factor
Register to Reply
sayed ahmed
Participant

Join Date: Oct 2011
Posts: 2
#6

Re: full details for designing capacitor bank for a system

10/18/2012 5:04 AM

for residential building building capacitor bank nearly to be 0.3 of the total connected loade for other industerial purpose QC=PTAN(∂1-∂2)
Register to Reply Off Topic (Score 4)
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#7
In reply to #6

Re: full details for designing capacitor bank for a system

10/18/2012 5:20 AM

That presupposes the residential tariff includes a charge for low PF, which most don't. The reason is that most domestic feeder cables are usually a long way from fully loaded.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
europium
Guru

Join Date: Mar 2012
Posts: 2189
Good Answers: 84
#8

Re: full details for designing capacitor bank for a system

10/18/2012 6:10 AM

I'm sorry, but it sure sounds you're asking us to do your job.

Don't you know how to do your job? Does your employer know you don't know how to do your job? Why should we here at CR4/GlobalSpec assume your liability by doing your work for you, which you submit in order to help you maintain the illusion to others that you know what you are doing?

On another thread you asked, "how to design the mccb for motor. is it 2.5 times the full load current"

If it is your job to know these things, why then don't you know them? If we make a mistake in our calculations, how will you know, if you don't how to do this yourself? What if our mistake causes loss of life and property? How is it you came to be entrusted to know these thingss, if you do not in fact know them. Trusted to have expertise which you don't really have?

I know how to calculate these things, but I refuse to be a part of this.

Sorry, Bubba. No deal.
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#9

Re: Full Details for Designing Capacitor Bank for a System

10/18/2012 10:49 AM

http://cr4.globalspec.com/thread/78876#newcomments
Register to Reply
jack of all trades
Guru
New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Sep 2006
Location: Auckland, New Zealand
Posts: 8777
Good Answers: 376
#10

Re: Full Details for Designing Capacitor Bank for a System

10/18/2012 4:23 PM

Interestingly enough this information is available using a simple internet search.

Please try this first, followed by contacting capacitor bank suppliers directly (if this is not a homework question, which I believe it may be based on your previous question on MCCB selection) so they can supply a safe system tailored to your 250kW application, what ever it is.

__________________
 jack of all trades
Register to Reply
Register to Reply
Have a Different Question?
11 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); cpshajeer1988 (1); europium (1); jack of all trades (1); Joshi (1); pnaban (1); PWSlack (3); sayed ahmed (1); wareagle (1)

Previous in Forum: How to Decide the Suitable MCB Size?   Next in Forum: AC or DC Rotor Drop Test Problem

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 (87 right now)
Show Members
Advertisement