While enjoying electrical engineering you must have come across transformers and might have noticed that the power ratings of the transformers are in KVA not in KW which is conventionally used for denoting power ratings in electrical devices.
kVA is the unit for apparent power. Heat is always proportional to the square of the current amplitude, irrespective of the phase angle, So a transformer has to be rated by apparent power(KVA).
There are 2 losses in transformer. One is copper loss which depends on current and the other is iron loss which depends on voltage. These two factors are not affected by the power factor( This is why transformers are rated in KVA and not KW)
While enjoying electrical engineering you must have come across transformers and might have noticed that the power ratings of the transformers are in KVA not in KW which is conventionally used for denoting power ratings in electrical devices.
kVA is the unit for apparent power.
transformers are always rated in terms of apparent power to know about the active and reactive power.
kVA is the unit for apparent power. Heat is always proportional to the square of the current amplitude, irrespective of the phase angle, So a transformer has to be rated by apparent power(KVA).
Transformer power is given by P=V*I which takes the unit of KVA while that of KW has energy term.
There are 2 losses in transformer. One is copper loss which depends on current and the other is iron loss which depends on voltage. These two factors are not affected by the power factor( This is why transformers are rated in KVA and not KW)