Rating definitionThe power rating of an alternator is defined as the maximum power it can safely and effectively deliver under certain conditions.Loss and heatingThe copper loss (I2R) depends on the armature current and the iron core loss depends on the voltage, both of which cause the alternator to heat up.Not affected by power factorAlternators are rated VA, KVA, or MVA because these losses are not affected by the power factor.Output calculationThe power output is the product of the power fact