why transformer calling in VA rating
Answers were Sorted based on User's Feedback
Answer / murali290
For any device the rating is given based on the losses occur
in it (loss is nothing but heat).In transformer 2 types of
losses occur 1.core losses: which depends on V &
2.cu losses: which depends on I only
but no losses depends on p.f.
therefore trasformer rating proportional to VI or VA
for large transformers the rating in kilo or mega ,hence
KVA or MVA
Is This Answer Correct ? | 3 Yes | 1 No |
Answer / praha tuty
Transformer has copper loss & iron loss. copper loss occur
in windings & it is due to emf.Iron loss occur in core due
to current. so in order to measure the both losses,
transformer ratings are in VA rating.
Is This Answer Correct ? | 0 Yes | 3 No |
Answer / rakesh maharjan
The KW rating is dependent on the power factor and power factor can be different depending the condition where as mostly 0.8, but if KVA rating is given we can calculate the KW rating as per our condition. So KVA rating is fixed and reliable to any malfunciton not to occur. so the transformer rating is given in KVA.
Is This Answer Correct ? | 4 Yes | 7 No |
Answer / pramod attri
it's using step up, and step down at same frequency..by
mutual inductance.. it case transformer calling in kv,,,
Is This Answer Correct ? | 0 Yes | 4 No |
Answer / rajeshambur
transformer have a two losses because open circut and short circut . two losses so transformer rating in va
Is This Answer Correct ? | 1 Yes | 11 No |
why transformer calling in VA rating
How to calculate the External Resistance required for 60HP slipring motor in case no any data of the Motor is available???
how the harmonics are generated in transforemer?
what is circuit recombiner and how it is different from circuit breaker
Why DG self motor winding burnt out?
why we use sinosidal voltage / current instead of others in system?
If the (Motor control center)Panel work on field the relay used in panel in the case this will be damage and no indication provide on panel.fault occur in panel and MCB will not trip. how happen the relay damage in panel and what effect of panel.
can SMPS work in DC supply ?
10 Answers HCL, IBM, Reliance,
Sir, I have applied for the of Assistant.engineer of NPDCL. please send me all AP TRANSCO AND JENCO solved papers of previous exams . I requested send me the papers to my id as soon as possible (rajanikanth_peddi@yahoo.co.in) (This is very urgent) Thank You,
Why we are putting off the APFC(automatic power factor control) panel while the generator is running?
advantage,disadvantage,aplication of sensorless direct torque control of induction motor
how many units consumed by a 33/440 2000 kava transformer in a day