Current Type Relay
A current relay is a normally open (NO) switch. When power is applied to a compressor, the main winding current flows through an armature in the relay. The magnetic effect of the armature closes the contacts. As the compressor speed increases, the main winding current drops until the point is reached where the reducing magnetic field can no longer support the contact assembly, and the relay opens.
Suits the below Kirby Compressor
