Previous in Forum: How to Measure Earth Resistance?   Next in Forum: Tips for Engineers
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
5 comments
Rate Comments: Nested
vaithilingam
Active Contributor

Join Date: Jan 2011
Posts: 17

APFC Panel Design

02/14/2011 3:28 AM

how can we find out KVAR requirement to design a APFC panel even if we have all the data like KW and DPF Already Installed capacity
Register to Reply
Pathfinder Tags: Calculation Of APFC Panels
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!
Priyadarshan
Associate

Join Date: May 2010
Posts: 46
Good Answers: 1
#1

Re: APFC Panel Design

02/14/2011 6:48 AM

Detailed calculations are available on WIKILINKs which would meet your requrements.

Priyadarshan
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#2

Re: APFC Panel Design

02/14/2011 9:53 AM

Connect a data logger or power analyser for the duration of working hours and record KW, kVAR, pf,harmonics etc. The max value of kVAR should be provided by the bank. From the client get kW of motors operating simultaneously to decide steps of capacitor(VAR). if you are not sure give the results in graphical form to a cap bank manufacturer and ask for a quotation including harmonic filters if necessary.

__________________
 pnaban
Register to Reply
electricalexpert65
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#3

Re: APFC Panel Design

02/14/2011 10:12 AM

Capacitor kVAR required = kW (tan phi 1 - tan phi 2),

where,

kW = Connected load in kW

phi 1 = Power Factor angle of existing power factor (Cos inverse of existing pf)

phi 2 = Power Factor angle of desired power factor (Cos inverse of target pf)
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#4
In reply to #3

Re: APFC Panel Design

02/14/2011 10:20 AM

Thanks. I made a mistake. To know pf required an economic study should be done. If overcorrected it will not be economical

__________________
 pnaban
Register to Reply
abasins
Power-User
Engineering Fields - Power Engineering - New Member

Join Date: Feb 2011
Location: Pakistan
Posts: 126
#5
In reply to #3

Re: APFC Panel Design

02/16/2011 9:38 AM

O people I am catching a mistake in here. Heheheheheh......

Your equation needing Maximum Demand Load rather than T.C.Load. However, when DF =1, mathmatical value of TCL=MDL, but theoritical equation remain to be with MDL?

__________________
 --
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
Register to Reply
Have a Different Question?
5 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:

abasins (1); electricalexpert65 (1); pnaban (2); Priyadarshan (1)

Previous in Forum: How to Measure Earth Resistance?   Next in Forum: Tips for Engineers

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 (83 right now)
Show Members
Advertisement