Answer / aamod tripathi

The Iron and copper losses are determined by tests only. It
is guaranteed parameter. If not met . the manufacturer has
to be imposed with a penalty calculated according to the
life of the transformer.

However as a thumb rule. 63 MVA transformer will have 1 -
2.5 % of no load + copper losses.

i have one source transformer with the capacity of 50KVA, connected with two loads 10kw and second one is 15kw.. how can i calculate first load in KVA and second one in KVA .. because Kva rating, power factor rating of of transformer is different from the load… there must be some way to calculate load KVA rating and power factor….

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