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jraubsr
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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?

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Tornado
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#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....

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PWSlack
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#2

Re: Power Factor in Dry Type Transformers

08/17/2012 5:04 AM

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

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silverfox
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#3

Re: Power Factor in Dry Type Transformers

08/17/2012 9:36 AM

Will your resistive load affect the pF??
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electronick
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#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.

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cuba_pete
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#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.
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bagman
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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.
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Mushtaq Hussainh
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Location: Hyderabad, India.
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#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.

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