Definitions for "Active power"
the system input power (in watts) for a lamp-ballast combination.
Active power is the real power (kW) supplied by the generator set to the electrical load. Active power creates a load on the generator set's engine and is limited by the horsepower of the engine. Active power does the work of heating, turning motor shafts, etc.
The power (in Watts) used by a device to produce useful work. Also called input power.