According to the company, the ZCPR Series of potential relays, designed for the HVAC/R industry, assist in the initial function of single-phase motors, which employ start capacitors for high torque. The coil of a potential relay is energized by the potential of the start winding. When this voltage increases to the pick-up value, the contacts open and disconnect the start capacitor. The relay remains energized until the start winding voltage is removed, or decreases below the drop-out value. Common applications include air-conditioning, commercial refrigeration, heat pumps, and more. The relays feature large silver/cadmium oxide contacts and various operating positions and mount styles are available.
Zettler Controls, Inc.