On the issue of 220V electricity for civil use

Electricity is like water, flowing from there to the bottom. Of course, the same goes for electricity, and there is also an electric current in the 0 line, which flows back to the transformer. When you test with an electronic voltage tester, there is a potential difference but it is very small.

I think the potential difference comes from the resistance of the 0 line, the resistance from your test point to the ground of the transformer, if the resistance from your test point to the ground of the transformer is smaller than the 0 line, the voltage you measure is not 36V. I used to use the 0 line to touch the ground wire and still ignite, so it is possible that the 0 line contact is not good,

When there is an electric current flowing in the line of fire, there is a magnetic field around it, and it is alternating current, so the magnetic field is constantly changing.

For the zero line, due to the constant change of the passing magnetic flux (caused by the change of magnetic field), an induced electromotive force (i.e., an induced electromotive force (if the induced electromotive force generated by the change in magnetic flux due to the movement of the wire becomes a dynamic electromotive force).

Electromagnetic induction should have caused this phenomenon.

For the neutral line, there is no current in the standard case, but it is difficult to achieve this condition in general, that is to say, in the general case, there is a current passing through the neutral line, so there is also a voltage, and the level of this voltage is related to the size of the current in the neutral line, so this voltage value is not fixed.

There are two possibilities.

1.The neutral line induces the magnetic field on the live wire, creating an electromotive force.

2.There are also working appliances on the line, so much so that there is current flowing through the neutral line.

The neutral wire is not a ground wire, and it will have a certain voltage, but it is not dangerous.

Three-phase alternating current unbalanced.

Your bounty is too small, and you are not happy to write about the process.

What's the matter, if you use more electricity, you can still run electricity, and if you have the ability, you can count that one.

The civil power supply voltage of 220V is the phase voltage.

The voltage between any phase wire and the neutral line in the three live wires is called phase voltage UA, UB, UC, and the voltage between the three phase wires and the neutral wire is 220 volts in China's low-voltage power supply system.

The voltage between the three phase wires is called the line voltage. In a symmetrical three-phase system, the magnitude of the line voltage is a multiple of the phase voltage. In China's low-voltage power supply system, the line voltage is 380 volts.

Low-voltage distribution lines generally use three phase wires (live wires) and one neutral wire (ground wire) to transmit electric energy.

The civil power supply voltage of 220V is the phase voltage.

The concept of alternating current goes like this:

1.The phase voltage refers to the voltage between the phase line and the neutral line, and the line voltage refers to the voltage between the phase wire and the phase wire.

2.Because the 220V voltage is the voltage between a phase line and the neutral line, the 220V voltage is the phase voltage. And the 380V voltage refers to the voltage between the phases, so 380V is the line voltage.

Answer: Concept: Phase voltage refers to the voltage between the phase line and the neutral line. Line voltage refers to the voltage between phase wires and phase wires.

According to the Chinese voltage standard, 220V is the phase voltage and 380V is the line voltage.

The phase voltage, of course. The relative zero line is the phase voltage.

Phase voltage: The voltage between any phase line (live wire) and the neutral line is called phase voltage, which is 220V

Why is China's voltage 220V, while the United States has only 110V, which is safer?

Why is the voltage in China 220V, while the United States only uses 110V? After reading the knowledge!

308 What do you use it for? Isn't that a waste! Two hundred and two are enough....

AC and DC

In fact, the 220V electricity used at home is all lead lift AC electricity. The main difference between alternating current and direct current is whether the direction of the current changes. As the name suggests, direct current is also known as constant current current, and its current direction is constant, whereas the current direction of alternating current changes with time.

So how should we use electricity safely in normal times?

Answering the power for safety

1. Do not touch the live wire or the conductor connected with the live wire, and pay special attention to the original insulated object conducts electricity.

2. Do not get close to the high-voltage charged body, because there are two types of high-voltage electric shock: high-voltage arc electric shock and step voltage electric shock, and electric shock can also be done without contact.

3. If someone has an electric shock accident, never pull the electrocuted person by hand, and cut off the power supply as soon as possible, or use a dry insulator to pick the wire apart; If you are electrocuted at high voltage, you should notify a professional as soon as possible.

4. If the electrocuted person is unconscious, the power should be cut off first, and then artificial respiration should be done and sent to the hospital; In the event of a fire, the power should be cut off before the fire is extinguished.

In general, the 220V electricity used at home is alternating current, and its current direction will change. When encountering circuit problems, if conditions permit, you need to find relevant people to help solve them. Do not inspect the circuit without permission to avoid danger.

Civilian is 220V alternating current.

The industrial general use of 380V AC AC point is conducive to long-distance transportation, the higher the pressure, the more conducive to transportation. That's why when we deliver electricity over long distances, it's all high voltage. Then it goes to the vicinity of the community and then turns into the low-voltage electricity we use through the substation.

For example, the more pressure a water company puts on the water, the more water it outputs. Low voltage is good because it is not easy to burn out electrical appliances.

But there are many remote areas in our country, which have a large land area, and do not have so much capacity to use low-voltage electricity. Many developed countries use a voltage of 110V.

It's alternating current. Single-phase electricity is 22ov for household use, and three-phase 380v for industrial electricity.

Alternating current, grid long-distance transmission is alternating current.

It's definitely AC! Otherwise, the transformer will be useless.

China uses alternating current with an alternating frequency of 50Hz.

The usual household appliances in our country are:

The AC voltage is 220 volts, and the prescribed symbol in the mathematical and scientific circles is 220V

The charger of our mobile phone, the two-pin plug is plugged into a 220V outlet. At the other end is a low-voltage direct current that has undergone transformer and rectification, which is about 5---12 volts. If you touch it with your hands, you can't get electricity.

Some have a large input current, some are 1 amp. - Of course, the charging time is shorter. Most are amperes, labeled as 530 mA or with:

DC 500mA callout). DC is "Direct Current".

AC is denoted by AC.