The difference between the neutral ground wire of the 380V electric fire wire

Three-phase electricity refers to three live wires, each of which is just different in phase.

Two phases refer to two of the wires, some lights, the welder is to take two different phase wires connected at both ends.

Single-phase refers to taking one of the live wires to connect one end of the lamp and the other end to the neutral wire. The same goes for other loads.

The live wire is connected by the generator of the power plant, which is to send electricity from the power plant to your home.

The neutral line is generally said to be a wire that is connected from the neutral point of the transformer and buried in the ground at the same time. Because it's buried in the ground at the end of the transformer, if you touch the light when it's on, it won't be electrical, but it's best not to touch it. What if?

Some of the ground wires are connected from the ground buried with a piece of iron, and some are buried with the zero wire on the transformer side, and pull the root wire to your home like the zero wire, but the zero wire is to participate in the use of electricity, and the ground wire is only used to connect the equipment shell.

Electricity is a system, and the more you know, the better you understand the questions you ask. If you understand it, look at the basics of electricians, and others can't pass it on to you in words. In particular, the phase involves a sinusoidal function, and if you understand this mathematical problem, you will have a deeper understanding of electricity, and you will not be like some electricians.

What you are asking about is that the low voltage side (secondary) of the transformer is the star connection (Y) with zero potential at the middle point, and the phase voltage of the three phases A, B, and C is 220V, while the line voltage is 380VThe middle point is grounded to prevent potential drift, and is usually called the ground wire. color on the part; The ground wire is usually a two-color line, while the phase line is a single-color denote such as; red, green, yellow, etc.

The wire is connected incorrectly, and the ground wire is connected to the phase wire; As a result, the line voltage of the live wire and the ground wire is measured out of 380; The phase voltage of 220 is measured from the ground and neutral wires.

Phase B is grounded, and the N wire is not grounded, so the voltage of the live wire and the ground wire is 380V, and the N (zero) wire and the ground wire have a voltage of 220V. This is the case with IT systems, where a phase to ground does not cause tripping.

When the three-phase load at the user side is unbalanced (the balance is relative, the imbalance is absolute), there must be a current in the neutral line. Due to the line resistance, the neutral line at the user side has a voltage to ground (in fact, the neutral line voltage drop from the user to the transformer side of the neutral line).

When the neutral current is large and the line is relatively long, this voltage will also be very high. This phenomenon of high voltage rise in the neutral line due to the large current of the neutral line caused by the unbalanced three-phase load can also be called "neutral voltage drift at the user end".

Hehe, what do you judge by the live wire, the neutral wire, and the ground wire, is it by the electrical color?

Don't touch electricity, especially the 380 one.

One is three-phase electricity and the other is two-phase electricity, a multiple of the root of 3!

That is, your wire is connected to the wrong wire, and the ground wire is connected to the phase wire;

As a result, the line voltage of the live wire and the ground wire is measured out of 380; The phase voltage of 220 is measured from the ground and neutral wires.

It must be that the ground wire is not grounded and is parallel with another live wire.

380V voltage is two wires or three wires, are live wires, in China's power supply voltage standard, the use of three-phase four-wire power supply mode, that is, three live wires and a zero line, one of which is a live wire and a macro cluster of zero wires constitute a single-phase voltage is 220V. The three-phase voltage between each two live wires is 380V, and the minimum electricity of 380V is two live wires. Generally, three-phase electrical equipment is mostly three live wires, such as motors, etc., some three-phase electrical equipment still needs 220V voltage places, you need to add a zero wire, like three-phase electricity 3 5 hp air conditioner is mostly with three live wires and a zero wire.

Summary. Dear, hello, I am glad to answer for you, under normal circumstances, in a power supply with a voltage of 220V, the voltage of the neutral line (N line) and the live wire (L line) should be 220V. The voltage of the ground wire (PE wire) should be close to 0V, because the function of the ground wire is to protect the safety of the electrical appliance and connect the electrical shell with the ground to prevent the shell from being electrocuted.

If what you are saying is true, i.e. both the neutral and live voltages are 220V, and the ground voltage is 190V, then it may be due to the following reasons:1The line is connected incorrectly.

When installing the circuit, if the wrong line is connected, the voltage may not be normal. For example, the neutral wire and the ground wire are reversed, or the neutral wire and the live wire are reversed, etc. 2.

Power issues. Power supply issues can also cause voltage anomalies. For example, the power supply voltage is unstable or the power supply is poorly contacted.

3.Electrical problems. Problems with the appliance itself can also cause voltage anomalies.

For example, there are problems such as short circuits or leakage inside appliances. If this happens, it is advisable to disconnect the power supply immediately and seek the help of a professional electrician for inspection and repair to ensure the safety of the appliance and people.

The voltage of the neutral wire and the live wire is 220V, and at the same time the ground wire is 190.

Dear, hello, I am glad to answer for you, under normal circumstances, in the power supply with a voltage of 220V, the stupid voltage of the neutral line (N line) and the live wire (L line) should be 220V. The voltage of the ground wire (PE wire) should be close to 0V, because the function of the ground wire is to protect the safety of the electrical appliance and connect the electrical shell with the ground to prevent the shell from being electrocuted. If what you are saying is true, i.e. both the neutral and live voltages are 220V, and the ground voltage is 190V, then it may be due to the following reasons:

Absolute 1The line is connected incorrectly. When installing the circuit, if the wrong line is connected, the voltage may not be normal.

For example, the neutral wire and the ground wire are reversed, or the neutral wire and the live wire are reversed, etc. 2.Power issues.

Power supply issues can also cause voltage anomalies. For example, the power supply voltage is unstable or the power supply is poorly contacted. 3.

Electrical problems. Problems with the appliance itself can also cause voltage anomalies. For example, there are problems such as short circuits or leakage inside appliances.

If this happens, it is recommended to disconnect the power supply immediately and seek the help of a professional electrician to accompany Chunhong to inspect and repair it to ensure the safety of the appliance and personal safety.

Dear, you can also check whether the fuse has been blown out.