Answer / prof. nazar m. karyar

KVA is the apparent power of an electrical load (refer to
the power triangle diagram),it means the voltmeter reading
times the Ammeter reading of the electrical load. KWh is the
electrical energy consumed by the electrical in certain
hours of time

Answer / laxman murmu

kva means kilo volt ampere.the transformer,alternator rating
are measured by kva.khw means kilo watt hour.it is the unit
of electrical energy.

Answer / keshav

Both are unites of power.
KWH=KVA X power factor.
or KWH=KVA X PF
If power factor is not given, it is assumed to be 0.8
KWH is the actual power that is available and can never be more than KVA.
For pure resistive load, KWH=KVA as Pf is unity in this case.

Answer / bala

KVA-it means Kilo Volt Ampere.it is unit of transformer.
KWH-it means Kilo Watt per hour.it is the unit of power.

Generally we denote power in 'p',voltage in 'v'but why can't we denote current in 'c' instead of I.

4 Answers   Bhel,

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how can we save enegry by using VFD for Resiprocating Air compressor which is having more unloading running hours

0 Answers   MRF,

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Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

0 Answers  

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1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

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Pls mail me utility & Dg related question with answer

0 Answers  

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3 Core x 35 Sqmm Cable (How we measure 35Sqmm)

4 Answers   Alpha Star, Brother,

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what is the difference between power and distribution transformer?

32 Answers   L&T, VJTI, Wenke Electricals,

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase, before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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Is it possible to implement Restricted Earth Fault protection for a transformer without neutral CT?

2 Answers  

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in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

0 Answers  

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electical engg basic question

1 Answers   Power Plant,

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When we use PT in HT Panel why the ratio is 11Kv/√3/110v/√3 please explain briefly with suitable formula?

1 Answers  

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