The intermediate relay only 24V how to control the AC contactor through what connection
The intermediate relay controls the contactor, which is not related to the voltage level of the relay itself, only to the voltage level of the relay contact.
Weak control of strong electricity, is the basic principle of control, you can use the intermediate relay (DC 24V coil) auxiliary contact control AC contactor pull or disconnect, indirect control motor start and stop:
Turn left to turn right
The red circle position in the figure above is the socket of the intermediate relay, the 11 and 10 terminals are the coils of the relay, and the DC24V is pulled after the load.
When the coil is energized, the 8 and 12 terminals are normally open, turn on, load AC, control contactor A1 and A2 (also coil) live, the final control contactor pull.
Protection or manual control connected to the middle relay coil (24V), the middle relay after excitation action, the closed contact with the contactor of the closing coil, making the contactor action.
