It's very simple. This means you missed physics class when you were in middle school. I have to catch up on a lesson.
In the star connection of the three-phase generator, the ends of the three windings are connected together to form the common terminal - neutral line - neutral line. The transmission lines connected to the starting ends of the three windings form phase lines, also called live wires. The voltage between the (live wire) and the neutral wire is called phase voltage U1. The voltage between the three live wires is called line voltage U2. The relationship between line voltage and phase voltage of star connection is U2=√3*U1 for example: the voltage in three-phase four-wire system of daily power system is 380/220V; the line voltage is 380 V and the phase voltage is 220 V.
To put it simply: the voltage between the three live wires est of 380 V, and the voltage between a live wire and the neutral wire is 220 V. Your household appliances must have used 220 V before (i.e. a live wire and a neutral wire ), it is impossible to connect three (or two) live wires.
As for the light bulbs in your house that sometimes turn on and off, there may be three-phase electricity users near your house or behind the transformer. The three-phase motor consumes a lot. of current at startup, causing instantaneous current and voltage in your devices. If the voltage decreases, the device will restart or the bulb will turn on and off.
Solutions: 1. Change the wiring and do not use the same transformer with the three-phase motor; 2. Do not start the three-phase motor when using electricity;
>3. Others You do not need any electrical devices to start the engine. 4. You can buyUse a voltage stabilizer as a temporary solution. I hope you are satisfied.
The 380V 220V generator only has 380V power but not 220V power. What is happening?
220V is a alternating current generator. The properties of the generator have changed.
Because it has only one sine wave. A single phase wire cannot reverse phase.
Two phases cannot reverse phase. They belong to the same nature but at different poles
If you think about it. both ends of the filament are identical. The neutral wire can The phase line connected to end 1 can also be non-polar
But the three-phase is different It can be divided into 123 132. 321 312 231... The three-phase comes from the generator
The direction of the rotor determines the role of the neutral wire, which forms a loop with the phase wire in the AC electrical circuit. , only a certain current must pass through itr to be used. It has nothing to do with the nature of the power source. When the electrical appliance is turned on, there must be power. The existence of the current must have a path (loop). ). At this time, the neutral line (neutral line N) will be used as a load wire to form a loop current /////The phase line you are testing is live. , touch the phase wire with your right hand and use the electric pen with your left hand to test the phase wire. You will find that the phase wire has no electricity and you have not received an electric shock. does not light up when testing with the electric pen
this is because you are standing on the ground. What you tested is that you can stand on a dry chair and touch the phase wire with one. hand and take an electric pen with the other hand to test the neutral wire. You will find that the neutral wire is electrified and there is no polarity.CDo you understand the difference between the sexes?
Do you understand this? I'm so lazy that you make me type so many times.
Can household appliances use 220V mains voltage? That is, 2 and live wire, but no neutral wire. The voltage is always 220V.
The line voltage of the three phase generator is 380 V. It is impossible that there is no voltage of 220 V. This is because you don't understand how to get a voltage of 220 V.
Besides, you said at the beginning that it was a 380V/220V generator. As long as you understand the reason, you can use it.
According to logic, this generator has four conductor wires, three of which are live wires, and the voltage between the live wires is 380 V. There is also a neutral line (neutral line) and the voltage between any phase and the neutral line is 220 V.
In such a three-phase circuit, 380V is called line voltage, 220V is called phase voltage, and the line voltage is three times the root of the phase voltage.
Note: The three-phase generator can use 380V load or 220V load, but the three-phase load should be kept consistent as much as possible to ensure three-phase voltage balance.
The question raised by others is correct. People who scold the mentally retarded are ignorant. The two live wires, he says, are often 220 V. For example, in a small generator you buy, both wires are live wires and the voltage is 220 V. Right now, they are different from the live wires and neutral wires provided by the. power supply office, so they are called current wires. The live wire is 220 V, and some small three-phase generators also have 220 V between the two live wires.
If the two wires under tension ggenerated by the generator are 220 V, be careful when using them. Some household appliances cannot be powered and may burn the appliances. For example, if the frequency is wrong, some devices will not work.