1. Connect the three main contacts at the lower end of KM 1 to the three upper ends of the heating element of the thermal relay (***3 wires);

2. Connect the three lower ends of the heating element of the thermal relay to the wiring boards U 1, V 1 and W 1(***3 wires);

3. Connect three main fuses respectively, and the upper ends of three main contacts of KM3 (***3 wires);

4. Connect the lower ends of the three main contacts of KM3 respectively, and connect the wiring boards W2, V2 and U2);

5. Short three main contacts (2 short wires) at the top of KM2;

6. Connect the three main contacts at the top of KM 1 and KM3 respectively (from inside to outside, with ***3 wires);

7. Connect the three main contacts at the lower ends of KM 1 and KM2 respectively (connected from inside to outside with ***3 wires);

8. Connect two control circuit fuses to two main circuit fuses respectively. (2 wires)

electrical machinery

Motor (English: Electric machinery, commonly known as "motor") refers to an electromagnetic device that realizes electric energy conversion or transmission according to the law of electromagnetic induction. In the circuit, it is represented by the letter m (the old standard is d).