The key switch must pay attention to the problem of electromagnetic coil when it is used. These problems are not important, but they can not be ignored. So we must pay attention to these problems. Some requirements and details in the circuit will be introduced to you below.

The key switch AC contactor is actually a kind of remote control switchgear. It can be used to connect or disconnect the main circuit and control circuit under normal working condition in the automatic control of machine tool electrical appliances. It can also be used to connect and disconnect the circuit over a long distance. It can also start and control the AC motor frequently.

When the electromagnetic coil of the key switch AC contactor enters the rated voltage, the magnetic field will be generated in the coil, and the moving iron core will be sucked down. At this time, all the main and auxiliary contacts will be closed under the action of the armature, while the normally closed contacts will be disconnected. When the coil is cut off, the static core suction disappears, and the moving core is reset under the reaction of spring force, thus driving all contacts back to their original position.

The problem of electromagnetic coil in key switch must be done well to ensure normal use.