Metal Oxide Varistor (MOV)
Mount a Metal Oxide Varistor (MOV) to your Contactor to protect your SCR’s from transient voltage surges. MOV’s are ideally suited for welding applications. Their high clamping efficiency and low steady state power dissipation offer considerable advantages in protecting the SCR Contactor and control circuitry. Darrah’s MOV’s feature high surge current capability, instantaneous response in a compact and robust package. Selection of the MOV is governed by incoming line voltage and SCR voltage rating (PIV).
Incoming Line Voltage:
Minimum SCR Voltage Voltage (PIV) (VRRM):