Total power of the compressor unitconsumed on load – active electrical power [kW] consumed in the power supply of the complete compressor unit when it works in the discharge phase of its operation (on load mode), including the active power of the fan and the built-in dryer, if it is built into the unit.
Total power of the compressor unitconsumed off load – active electrical power [kW] consumed in the power supply of the complete compressor unit when it works in its idle mode operation phase (off load mode), including the active power of the fan and the built-in dryer, if it is built into the unit.
Power on the compressor shaft – mechanical power [kW] needed for the compression module (air end, stage) to deliver the required air flow at the expected pressure. The power value on the compressor shaft does not take into account: the efficiency of the coupling system or the belt transmission system, the drive motor, engine or turbine, or the efficiency of its internal gearbox (which should be indicated in the specification). (See also, ‘Specific Power’)