The principle of ac contactor and matters needing attention

- Jan 16, 2020-

About the principle of ac contactor and precautions for use, the three-phase contactor has a total of 8 points, three input, three output, and two control points, when using ac contactor, pay attention to the voltage of external power supply.

How the ac contactor works


When the coil is energized, the static iron core generates electromagnetic suction, which pulls the moving iron core together. Since the contact system is linked to the moving iron core, the moving iron core drives three moving contacts to run simultaneously, and the contacts close, thus connecting the power supply.

When the coil is powered off, the suction disappears, and the linkage part of the moving iron core is separated by the reaction force of the spring, so that the main contact is disconnected and the power supply is cut off.

How the ac contactor works


When the coil is energized, the static iron core generates electromagnetic suction,Which side of the moving iron core together. 

Since the contact system is linked to the moving iron core, the moving iron core drives three moving contacts to run simultaneously, and the contacts close,Thus connecting the power supply. 

When the coil is powered off, the suction disappears, and the linkage part of the moving iron core is separated by the reaction force of the spring,So that the main contact is disconnected and the power supply is cut off.