24 Aug 2018

Why Transformer Rating in KVA not in KW


Transformer Rating in KVA not in KW: 
As We know Two type of losses in Transformers:-
  1. Cu Loss  (Copper Loss)
  2. Iron Loss

Cu loss of transformer depends on Current and Iron Loss of Transformer Depends on Voltage. So, Total Transformer loss depends on Voltage-Ampere and not on phase angle between voltage and current i.e. it is independent of total power factor (pf).
For that kind of reason Transformer Rating is in KVA ( Kilo Volt Ampere ) and not in KW (kilo watt).


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