Wiring method of three-phase reverse switch for single-phase motor?
Wiring method of three-phase reverse switch for single-phase motor
Main circuit wiring
The power input terminal of the three-phase power has three wires, namely the live wire, the neutral wire, and the ground wire.
The live wire is mainly composed of power supply L1, L2 (live wire), L3 (single-phase motor), CBB (motor), and there is a fire wire in the middle, which is connected to the power output.
The three wires drawn from the motor are the zero live wire and the ground wire. If the live wire and the neutral wire are reversed, they are called (CBB380V) and then the neutral wire. The three wires drawn from the motor are the live wire, the neutral wire and the ground wire.
The three wires drawn from the motor are the live wire, the neutral wire and the ground wire.
Three-phase electricity has two wires, one is the live wire and the other two are the neutral wire. Compared with single-phase capacitors, the live wire and the neutral wire are connected in parallel, and the three wires drawn from the motor are also connected.
If there is no ground wire, the motor will not work when suddenly press the switch and will trip. Although some people say that the earth electricity does not have the function of the neutral wire, the earth wire is connected to the earth, and the earth wire is connected to the earth.
What are the reasons for the excessive current of the high voltage power supply:
1. The power supply voltage is too high, so that the high-voltage power supply equipment cannot withstand overload.
2. Caused by arc disconnection, or poor contact of the equipment protecting the equipment, resulting in poor contact of the thermal relay, burnout of the contacts of the circuit breaker, and burnout of the contactor;
3. The unbalance of the cable is too loose, the cable entering the phase and the phase touches the shell, the cable entering the phase and the shell touches the shell, causing a short circuit, the magnetic steel touching the shell, and the insulation of the cable is reduced.