Differential generator control relay for D-C aircraft electric systems

THE principal function of a generator control relay on aircraft d-c electrical systems is to connect the generator to the ship's d-c bus whenever the generator is in a condition to furnish power to the bus, and to disconnect the generator from the system whenever the generator draws reverse current from the bus above a predetermined value. The relay also provides a means of disconnecting or holding off any generator at the will of the operator.