IF we have 500kva transformer & know the current on HT & LT side, how can we consider for its breaker?
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Answer Posted / jords
for single phase- 500,000 divided by the voltage times 80% for
your safety factor equals your C.B. size.
for three phase- 500,000 divided by the voltage divided by
square root of three times 80% for your
safety factor equals C.B. size.
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