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Anbarasu
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Join Date: Jul 2012
Posts: 1

Transformer

07/17/2012 8:37 AM

why transformer rated in KVA
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nobodysomebody47
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Join Date: Nov 2011
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#1

Re: Transformer

07/17/2012 9:12 AM

Why is the rating of transformers given in kVA and not in kW?

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spradhan
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Join Date: May 2010
Location: Bhilai,Dist.-Durg,Chhattisgarh,INDIA
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#2

Re: Transformer

07/17/2012 9:31 AM

Please see my reply posted against a similar question put earlier in this forum by suhasdh.

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Bibo92004
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Join Date: Jul 2011
Posts: 29
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#3

Re: Transformer

07/17/2012 9:46 AM

Because a transformer is not a unit that consumes power, it only transfers the power to the load. Unlike motors that consume power therefore they are more useful to be rated in terms of KW.. Also, KVA rating of transformer is a better indication of their load capacity to avoid saturation
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Crabtree
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Join Date: Jul 2007
Location: Commissariat de Police, Nouvions, occupied France, 1942.
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#4

Re: Transformer

07/17/2012 2:25 PM

Dunno. My one is rated in MVA, Mildred.

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electricalexpert65
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#5

Re: Transformer

07/29/2012 10:00 AM

Refer to any good text book on Electrical Engineering
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Mushtaq Hussainh
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Join Date: Jun 2011
Location: Hyderabad, India.
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#6

Re: Transformer

08/06/2012 1:54 PM

Copper loss of a transformer depends on current and iron loss on voltage. Hence, total transformer loss depends on volt-amps (VA) and not on phase angle between voltage and current i.e. it is independent of load power factor. That is why rating of a transformer is in kVA and not in kW.

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Users who posted comments:

Bibo92004 (1); Crabtree (1); electricalexpert65 (1); Mushtaq Hussainh (1); nobodysomebody47 (1); spradhan (1)

Previous in Forum: Pole Formation in Induction Motor   Next in Forum: What is the Difference Between Rated Short Circuit Duration 3 Seconds and 1 Seco

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