QC12 type irreversible magnetic starter control circuit

The magnetic starter can be used as a direct starting control device for cage asynchronous motors. The magnetic starter is actually a starting control device
composed of an AC contactor, a thermal relay, a button, etc. , so it has functions such as short-circuit protection, overload protection, voltage loss protection, and undervoltage protection. Commonly used magnetic starters include oc12 and other types, which are divided into two types: irreversible and reversible. (1) oc12 type irreversible magnetic starter control circuit     The circuit is shown in Figure 3-28.