Capacitive AC contactor DC operation circuit b

If the AC contactor uses DC or pulsating DC excitation, the power consumption of the short-circuit ring and the iron core can be reduced, thereby greatly reducing
the power consumption of the electromagnet and eliminating its noise. It can also reduce the temperature rise of the coil and prolong its operation. service life. There are many types of DC operating circuits
    for capacitive AC contactors , as shown in the figure. The capacitor C is generally 1 to 6 tj, F, 630V, and the resistor R is generally 5.1 to 27fl, 10 to 30W. The greater the contactor capacity, the greater the C capacity, the smaller the R resistance, but the greater the power.