![]() ![]() ![]() When the three pairs of main contacts of contactor KM1 are connected, the phase sequence of the three-phase power supply is connected to the motor according to l-l2-l3. forward switching contactor KM1 and reverse switching contactor km2. Two contactors are used in the control circuit shown, i.e. When SB2 is pressed, KM is closed, the motor is rotating forward, and the normally closed contact of SB2 is also disconnected, KM cannot self lock, so the motor can rotate forward by pressing SB2, and when it is released, the motor stops rotating, thus realizing the inching control.įorward and reverse inching control circuit diagram (2) ![]() Its normally open contact is directly connected with the coil of KM, while the normally closed contact is connected with the normally open contact of KM. Since the control circuit has a self-locking, the motor will rotate forward continuously as long as this button is pressed once. Press the SB1 button, the km (contactor) coil is powered on, the normally open contact is closed, the circuit is powered on, and the motor is rotating forward. Forward and reverse inching control circuit diagram (I) ![]()
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