- Overview of
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Overview of
variants In manual mode, the switching is performed from a push-button station. The button starts the open contact for a short circuit, and the stop operates to open. The connection diagram of the magnetic starter with self-catching looks as follows:
Let's consider the operation of the circuits of switching on and switching off the magnetic contactor. A push button of two buttons, when pressing START, the phase comes from the network via the STOP contacts, the circuit is assembled, the starter retracts and closes the contacts, including the additional NO, which is parallel to the START button. Now if it is released, the magnetic starter continues to operate until the voltage drops or the thermal motor protection relay P trips. When STOP is pressed, the circuit breaks, the contactor returns to its original position and contacts open. Depending on the purpose, the coil's power can be 220V( phase and zero) or 380V( two phases), the operation principle of the control circuits does not change. The inclusion of a three-phase electric motor with a thermal relay through the push-button terminal looks like this: 
In the end, it looks like this, in the picture:
If you want to connect a three-phase motor through a 220 volt magnetic starter motor, you need to perform the commutation using the following wiring diagram:
CUsing the three buttons on the control panel, you can arrange reverse rotation of the motor.
If you look closely, you can see that it consists of two elements of the previous scheme. When you press START, the contactor KM1 switches on, closing the contacts NO KM1, becoming self-picking, and opening NC KM1 excluding the possibility of switching on the contactor KM2.When the STOP button is pressed, the chain is disassembled. Another interesting element of the three-phase reversible wiring diagram is the power section.
At the contactor KM2, the phases L1 to L3 are replaced, and L3 to L1, thus changing the direction of rotation of the motor. In principle, this control circuitry of three-phase and single-phase loads covers the home needs with a head, and is easy to understand. You can also connect additional elements of automation, protection, limiters. Consider them all you need separately for each particular device.
With the above diagram of the connection of the magnetic starter, it is possible to open the garage door by introducing additional limit switches into the circuit by using the NC contacts in series with NC KM1 and NC KM2, limiting the movement of the mechanism.
Instructions for connecting
The easiest way to connect is via the button. In this case, you need to act as shown in the video:
With the example of an engine it looks like this:
The motor can be connected in the reversed scheme as follows:
Here by this principle it is possible to connect the device independently to a network of 220 and 380 volts. We hope that our instructions for connecting the magnetic starter with diagrams and detailed video examples were clear and useful for you!
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