How does frequency affect KVA rating of a transformer?
If a 500 kva, 400 v, 60 hz t/f is to be operated on 50 hz
frequency then how will its KVA rating change?
a-increase
b-decrease
c-remains same
Also explain why do u think like that.
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Answer Posted / nikhil singh
Transformers are rated in kva and not in KW for taking into
account the core and copper losses which are dependent on
voltage and current respectively without involving power
factor.Now the copper loss is independent of frequency but
the core loss comprising of hysterisis and eddy current
loss is proportional to frequency.So as frequency decreases
core loss decreases and KVA rating decreases.
| Is This Answer Correct ? | 15 Yes | 16 No |
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