Working principle: since it is a point to move, then it is necessary to contactor electricity, whether the contactor, relay, time relay, all need electricity to work.So we will use the contact coil here, you look at the picture, the contactor coil working voltage, we will use the contactor is 220V.The contactor coils have A1- -A2 in which the contactor coils have two A2. When we connect it, we can connect it according to the actual situation.
Contactor directly electricity: The following figure is to let the contactor directly electricity, the first power supply is 220V, a fire line, a zero line, a fire wire.Let’s first look at how the coil is connected, A1 of the fire wire inlet contactor coil, and A2 of the zero wire inlet contactor coil. ,
Main circuit: the fire line into the main contact point L1 zero line into the L2 T1- – - – -T2 outlet line connection load,
When we close the circuit breaker contactor, the circuit breaker contactor is stopped.
This circuit is called as a direct electric suction closing circuit.Below, we introduce the touch-on control circuit.
Contactor movement: first, the following figure is three-phase electricity, L1- – -L2- – -L3. QS is a circuit breaker, FU is a fuse, KM contactor primary contact, M motor,
Control circuit, SB button, KM coil.The three fire wires respectively enter the main contact of the contactor, the contactor exits into the motor, the control circuit L1 receives the SB button and passes through the contactor coil.
Operation: close the QS circuit breaker, press the start button SB, the contactor coil power, the main contact closed, the motor operation, release the SB button contactor coil power loss, the main contact disconnected, the motor power loss stop running.
Post time: May-05-2022
