KVA and KVAr KVA and KVAr are the most misunderstood terms in the world of electricity. Electrical circuits mainly have three types resistance or sometime called the impedances. Firstly conductors which is pure resistance such as your electric heater or toaster and this has power factor of one. Secondly inductive which is coil-based machines such as motors
The pure component of the induction such as coils in motors which cause the current to be lagging by 90o, due to the fact that motor acts as generators in some stages, is called KVAr, Kilo Volt Ampere Reactive, and power factor is cos 90 =
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