Previous in Forum: Youtube Engineering   Next in Forum: Synchronous Machine
Close
Close
Close
7 comments
Rating: Comments: Nested
Power-User

Join Date: Sep 2009
Location: Houston, TX
Posts: 118

Power Factor in Dry Type Transformers

08/16/2012 8:52 PM

Power factor in dry type transformers. Is there a standard that is used for motor loads combined with resistive loads?

__________________
Thank you for your help - By far the best info site!
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#1

Re: Power Factor in Dry Type Transformers

08/17/2012 1:36 AM

As long as the total KVA (loads summed vectorially) is less than the transformer rating....

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
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: Power Factor in Dry Type Transformers

08/17/2012 5:04 AM

...otherwise the overcurrent protective device will disconnect it.

__________________
"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
Power-User

Join Date: Nov 2011
Posts: 286
Good Answers: 15
#3

Re: Power Factor in Dry Type Transformers

08/17/2012 9:36 AM

Will your resistive load affect the pF??

Register to Reply
Power-User

Join Date: Jun 2007
Location: ether
Posts: 371
Good Answers: 1
#4
In reply to #3

Re: Power Factor in Dry Type Transformers

08/17/2012 10:17 AM

yes! as all the rest of the loads.

__________________
“For no man can forbid the spark nor tell whence it may come.” ? Francis Bacon
Register to Reply
Guru

Join Date: Dec 2010
Posts: 1895
Good Answers: 44
#5
In reply to #3

Re: Power Factor in Dry Type Transformers

08/17/2012 11:07 AM

Purely resistive loads are not considered for power factor correction. Concentrate on the inductive load.

Register to Reply
Active Contributor

Join Date: Apr 2012
Posts: 11
#6

Re: Power Factor in Dry Type Transformers

08/17/2012 7:35 PM

HI Jraubsr. If you have a need for a motor to drive a reasonably constant load you could use a synchronous motor and adjust the field exitation to help adjust load pf. This is not the cheapesyt opption but pf can be easily adjusted using this method.

Register to Reply
Commentator

Join Date: Jun 2011
Location: Hyderabad, India.
Posts: 92
Good Answers: 2
#7

Re: Power Factor in Dry Type Transformers

08/17/2012 8:47 PM

There no difference as long as power factor concerned between Oil Type or Dry type transformers. There is also no standard for power factor. It depends upon loads in KVA. Resistive load offer the unity power factor where as the induction motor offer the lagging power factor.

__________________
B.E, M.I.E, M.S
Register to Reply
Register to Reply 7 comments
Copy to Clipboard

Users who posted comments:

bagman (1); cuba_pete (1); electronick (1); Mushtaq Hussainh (1); PWSlack (1); silverfox (1); Tornado (1)

Previous in Forum: Youtube Engineering   Next in Forum: Synchronous Machine

Advertisement