... less than 30mm 4.Vibration frequency : 50-60hz RC Resistance and Capacitance Electronic Arcing 1. Working principleM series electronic arcing ... lines have contactor, relays and motor, and the final object is the motor control system of contactor instantly and contacts, often because of ... a filter, can effectively absorb sparks and arc produce by contactor, relays, motor carbon brush, so that the system ...