AC electromechanical relay RVA

single-phase

RVA potential relay is designed to start single-phase motors which employ both start and run capacitor (CSA and CSIR configurations) for high starting torque.The most frequent applications include air conditioning, commercial refrigeration, heat pump, etc. The coil is energized by the potential of the start winding. When such voltage is raised up to the pick-up value, the contact will open and disconnect the start capacitor. The relay will remain energised until the start winding voltage is removed or decreases to less than drop-out.