Three-phase AC contactors have several useful clients?
Also note that the voltage applied to the power supply is much (220V or 380V), are generally marked.
. And note whether the contact point is normally closed or normally open. If there is self-locking control, according to the principle of the line on it.
Know the principle, you should figure out the connection of the external power supply, that is, the coil of the two contacts
generally in the lower part of the contactor, and each side. The other few input and output in the upper part of the general, a look to know
