Previous in Forum: U.P.S   Next in Forum: Can a Battery be Reverse Charged?
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
2 comments
Rate this Comments: Nested
Anonymous Poster #1

Current Transformer

10/03/2011 10:03 AM

In LV system we use the power factor (capacitor) panel for power factor improvement which improve the power factor in steps but in power factor we use one current transformer also which has the same rating of incomer switch.So why current transformer is required in power factor?
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".

Comments rated to be "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, rate them!
msamad
Guru

Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#1

Re: Current Transformer

10/03/2011 10:37 PM

Power factor is the cosine of the angle between current and voltage (or KVA/KW). If you need to measure the power factor, you must have the phasor value of both current and voltage. In the Power Factor Improvement (PFI) panel, there is a power factor controller which requires power factor as input and hence both voltage and current are required as input to the controller for calculating power factor as input value. The CT is used for providing the current input to the controller. For HV system, the PT is also required for the same reason.

- MS

__________________
 "All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)
Reply Score 1 for Good Answer
No more "Almost" Good Answers.
2
soebfatehi
Power-User

Join Date: Jun 2009
Posts: 223
Good Answers: 15
#2

Re: Current Transformer

10/03/2011 11:21 PM

what is power factor?
Reply Good Answer (Score 2)
No more Good Answers. Go to first "Almost" Good Answer
Reply to Forum Thread 2 comments
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".

Comments rated to be "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, rate them!

Previous in Forum: U.P.S   Next in Forum: Can a Battery be Reverse Charged?

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 (43 right now)
Show Members
Advertisement