What is constant kva load?

A constant KVA load is an electrical load which has a constant apparent power consumption regardless of small changes in voltage. Constant KVA loads in industry are typically electric motor loads such as induction motors.

The interesting thing about an induction motor and why it is called a constant KVA load is, for a constant level of torque output of the motor, if the terminal voltage decreases by say 5% the motor current will actually increase by about 5%. Note that this constant KVA effect will only occure withing an narrow range of voltage deviation.

This is the opposite of a static (constant Z) load which if the voltage decreases the current decreases.