What is the effect of the contactor coil parallel capacitor?
causing the surrounding electronic equipment, especially the PLC's electronic control equipment caused by interference, but also reduce the electrical life of the contacts.
Since the coil of the contactor is an inductor, the dt is very small due to the fact that the dt is very small at the external contact, so the Lx di / dt is very large and the coil produces a very high reverse electromotive force, which causes the contact of the off- Large arc
Capacitors at both ends of the voltage can not be special changes, and the capacitor can delay and reduce the coil's reverse electromotive force, Reduce interference, extend the life of contacts.
In the capacitor in series with a suitable resistor, you can damp the oscillation, reduce the over-voltage time, to achieve better results, which is resistance capacitive absorber.
