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Anonymous Poster

kva

04/25/2008 1:34 AM

what some electrical devices are rated in kva other in watt????
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Sparkstation
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New Zealand - Member - Interested in everything- see my Profile please APIX Pilot Plant Design Project - Member - Member Engineering Fields - Electrical Engineering - Member Engineering Fields - Power Engineering - Member Engineering Fields - Civil Engineering - Member Hobbies - Musician - Autoharp and Harmonica Hobbies - Hunting - Member Hobbies - Fishing - Member

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#1

Re: kva

04/25/2008 2:31 AM

Hello Guest,

The larger electrical items are normally rated in kVA or MVA.

The reason is that in AC circuits, current and voltage are not necessarily "in step" because of inductance and/or capacitance in the circuit.

Watts is a term which may be applied to a DC circuit, or an AC circuit with "Unity Power Factor = Where the Voltage and current are exactly in phase with each other".

Read further here: http://en.wikipedia.org/wiki/Volt-ampere

Kind Regards....

__________________
 "The number of inventions increases faster than the need for them at the time" - SparkY
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Anonymous Poster
#2

Re: kva

04/26/2008 11:41 PM

KVA denotes a purely resistive load. Transformers use KVA designations.

James
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Anonymous Poster
#3
In reply to #2

Re: kva

04/28/2008 8:17 PM

james bad answer go back to the books perry
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