There are two wires coming out of the 220V generator, connect one to the hull then ground it, the neutral wire is connected to the hull then ground;
There are four wires coming out of the 380V generator, connect it from the star. The point neutral wire leads to the neutral wire, which is connected to the generator shell, ground wire, etc.
6-10KV is a non-grounding operating system. Directly powered high voltage loads are three phase and do not require a neutral line. There is no neutral line in the angular connection and the neutral line in. there is no need to remove the star connection. If low voltage electricity is supplied and the voltage is reduced by the transformer, there will be a neutral line.
220 V mains electricity distinguishes the neutral wire from the live wire. Why don't household appliances distinguish between neutral wire and live wiren?
Use a 220V test pen to check if this is the case. accurate. The international convention for a three-core socket is zero on the left, fire on the right, and ground in the middle. The four-conductor one has three-phase electricity, the bottom three are three live wires, and the top-middle one is usually a ground wire. There are also three fire connections and one zero connection. You can use an electric pen to detect live wires. The range of a multimeter should be greater than 380 V. The voltage between two live wires is about 380 V and the voltage between zero live wires is about 220 V. If the motor driven by the output turns at upside down, simply swap two live wires. Remember to turn off the power and pay attention to safety.
If the outlet is marked, L1L2L3 is the live wire, N is the neutral wire, and if there is an E, it is the ground wire.
Place afive-pin plug and socket with three lights, a zero, and a ground wire.
How is the neutral line of the 220V generator generated?
Because we use alternating current, which is a sinusoidal current, it i.e. its amplitude is plus or minus 220 V. When it comes to household appliances, it needs to be rectified, which means transforming both the plus and minus 220 V into 200 V , so the way you connect the neutral wire and the live wire is the same. Municipal electricity is three-phase and four-wire, that is to say three-phase lines and a neutral line. The voltage of one of the three-phase lines and the neutral line is 220 V, so there is a difference.
Detailed information:
The nature of the mains supply:
I am not talking about the distribution link, just use the 220V generator as a mains supply Let's take the example of the electricity supplythat: there are three generator windings, arranged evenly in a circle, so the electricity produced has three phases, with a phase difference of 120 degrees. There is a wire for each phase, and there. should be a head and tail of wire. This wire head and tail are 220V. At both ends of the power supply, connect the three wire ends (or wire ends) together. This parallel point is the neutral point and mark these three wire ends. a parallel head like ABCN respectively. Connect N to ground and N to ground. The earth potential difference is 0, and N becomes the working neutral line (the neutral line has a working neutral line and a protective neutral line, commonly known as the neutral line and the grounding line). ABC is called phase A, phase B and phase C (three live wires and three other points can form power supply and fire are called line voltages). , and fire and N scalled phase voltages.
Obviously, the phase voltage of the light and N is the voltage of 220 V at the end of the wire and at the end of the wire of a winding on the generator. Because it is not a direct current generator, it is divided into positive and negative. AC current has neither positive nor negative points, so the functions of these two wires are the same, that is, the functions of hot and neutral wires are the same. The difference between hot and neutral wires is artificially adjusted. For electrical appliances, they are the same. , so that they can be used correctly. It can be inserted backwards or forwards.
Reference link: Baidu Encyclopedia - Nature of Mains Power
The conducting wire of a single-phase generator is actually no different from the live wire and neutral wire, but if one end of the coil is grounded, the output line voltage at the terminalof earth is always zero, which is why it is called neutral line. If the stator coil ground terminals are reversed, the live and neutral wires are reversed. The same goes for three-phase generators. In order to save material, the three ground terminals are combined to form a common neutral line, saving 2 wires.
PS: In fact, the neutral line voltage is not always zero. When the switch is closed, current flows in the neutral line. Due to the resistance of the wire itself, there is residual tension.