The three-phase coils of the four-wire four-phase generator are connected in a star configuration, and the neutral point of the three phases is connected to the neutral line Add the three-phase live wire, that! that is, a three-phase, four-wire system.
The generator panel will have three-phase outlets and single-phase outlets. If you do the wiring yourself, you can find three-phase wires and connect them to the three-phase outlets. The neutral point is connected. as the neutral wire, and the neutral wire is used as three-phase wires.
As shown in the picture, which wire of the generator is considered as the neutral wire and the live wire respectively?
There are four wires coming out of the generator, which should be three live wires and one neutral wire. One end of the three live wires is the live wire, and the other end is the ground wire and live wire. neutral wire.
Generally several wires orGenerator terminals have prescribed markings. After servicing the generator, the generator wiring must be connected correctly according to the markings.
When generator lead wires or terminals are not marked, or the markings are unclear, or the meaning of the markings is forgotten, the following methods can be used to identify the generator wires. earth.
1. Fire test method. When the generator is working normally, use a wire to scratch. If sparking occurs when a certain wire is scratched against the other two wires, then the wire is the ground wire and the other wires are for line of sight.
2. Voltmeter measurement method. When the generator is operating normally, connect the test lead on one end of the voltmeter to one of the lead wires and connect the other lead to the other lead wires. The voltage between the ground wire and the live wire is less thanthe tension. between two live wires. For example, if the voltage between a certain wire and other wires is around 6 volts, the wire is a ground wire. If you don't have a voltmeter, you can also use a 12 volt bulb (the voltage is too low and the bulb is easy to burn out), connect it to the two lead wires and determine the voltage. depending on the brightness of the light. When the ground wire and the live wire are connected, the light is darker, and when the two live wires are connected, the light is brighter.
The neutral line also comes from the power plant, and the neutral line is the neutral line. The generator only has three phases, but when passing through the step-down transformer (DY connection), the secondary side of the transformer brings out a cable from the neutral point. This is called the neutral line, which is also the zero line. mentioned by the poster.
The fact that the posterBeing able to think about the final destination of the neutral line shows that the poster is also a person who likes to think. Our electrical network is a mesh structure, and the neutral line comes out of it. this transformer will eventually be connected to another transformer.
I also suggest that the poster take a look at the TN system. The neutral line must be grounded.