Amps=Amperes Something about not liking the French
KVA = Volts x Total Amps
KW realwork =KVA x power factor
Power factor= Cos (Phase angle)
If your Voltage and current are out by 90 degrees you have zero power factor and no real work been done. ie KVA=KVARS
Unity power factor is when voltage and current are in phase and all the incoming power is converted to real work. KVA=KW
KVAR is a measure of how well balanced your power system. It can also be an indicator of faults.