Ac contactor connection

A:general three-phase contactor is a total of eight points,three road input,output,three road there

are two control points.Output and input is corresponding,very easy to see.If you want to add the lock,it will take a terminal that take from the output line to control points above.2:first of all

should know the principle of ac contactor.He is to add on the coil with external power supply,produce electromagnetic field.After power up and power down the contact point is broken.After know principle,you should make sure with the power of contact,namely coil two contact,generally at the bottom of the contactor,and members in the side.Several other road input and output in the upper part commonly,a see will know that.Also note plus the power electric motor 12v 500w supply voltage (220 v or 380 v),how much is generally must have.And pay attention to the contact point is normally closed normally open.If there is a locking control,according to the principle of the line is ok.Structure:(1) the contactor is mainly wholesalemotor.blogspot.com composed of electromagnetic system,contact system,arc extinguishing system and other parts.

(1) the electromagnetic system:electromagnetic system,including electromagnetic coil and core is an important component of the contactor,rely on it to drive the contact closing permanent magnet generators for saleand opening.(2) contact system:contact with the executive branch of

contactor,including main contact and auxiliary contact.The role of the main contact is switched on

and off the main circuit,control a larger current,and the auxiliary contact is in the control circuit,in order to meet the requirements of various kinds of control mode.(3) arc extinguishing system:arc extinguishing device to ensure off contact circuit,the electric arc reliable quench,reduce arc of contact damage.In order to quickly extinguished disconnected arc,contactor usually equipped with arc extinguishing device,generally USES half a longitudinal seam sealing clay arcing cover,with a strong magnetic blast circuit.(4) other parts:the insulation shell,spring,short circuit ring,transmission mechanism,etc.(2) working principle:when the electromagnetic coil is not energized the contactor,spring reaction force and bit core of gravity to keep main contact disconnected position.When the electromagnetic coil through control circuit on the control voltage (generally rated voltage),the electromagnetic force to overcome the spring inhale armature reaction to the static iron core,drive the main gasoline generator contact closure,processing circuit,auxiliary contacts with the action.