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IF we have 500kva transformer 11.0/0.415V, 50Hz. How to
calculate the current on HT & LT side, how can we consider
for its breaker (HT & LT both)? You are requested to solve
the question herewith.
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Answer Posted / antaratara ghosh
current on HV side= 500/(1.732*11)
= 26.24 A
current on LV side= 500/(1.732*0.415)
= 695.6 A
Breaker on HV side will be 630 A VCB (since it is the
lowest available VCB and in HV side you have to go for
VCB/SF6)
Breaker on LV side will be =greater than (1.2*695.6)A i.e.
834.72 A
so we consider it to be 1000 A ACB
| Is This Answer Correct ? | 19 Yes | 3 No |
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