What does the contactor lock mean?
If the contactor is not self-protected, you hold the start button and it is running, let it stop.
so after the start of the contactor point closure point, the coil can stop from the button Get the power, so that the formation of a self-preservation circuit.
Self-protection is through the stop button to take a power cord connected to the contactor on the open end of the point, open the other end to the contactor coil, s
t is through the start button (jog) after the start of the contactor coil to continue to have electricity, resulting in maintaining the contact path state
