What is the use of AC contactors?
The power is applied and the contact point is disconnected after power failure
Second: First, we should know the principle of AC contactor. He is using external power to the coil, resulting in electromagnetic fields.
If you want to add self-locking, then you also need to output from the terminal to a terminal connected to the control point above.
General three-phase contactor a total of 8 points, three input, three output, there are two control points. Output and input are corresponding, it is easy to see
