Why is the neutral end of an electric furnace more likely to burn out?

According to common sense, the fire wire end of the electric furnace is more likely to burn out, and the neutral end of the electric furnace is more likely to burn out, so it is necessary to consider whether it is falsely connected, or the oxide scale is not removed when connecting, resulting in excessive contact resistance.

Two possibilities. The first is that the laying wire is too thin and does not heat up after heat dissipation, and the second is that the terminal is seriously in contact with the tight, causing a large current to flow through oxidation and blackening, which is more likely to heat up and be burned!

The zero line terminal of the electric furnace is more likely to be burned out, because the electric furnace where the load is relatively large is generally the zero line above 1500w is easy to burn out.

You say that the neutral end of an electric stove is more likely to burn out, I don't think that's a correct statement, it looks like his wires are not good.

Blower + electric furnace wire + hair dryer = electric hair dryer wind power furnace wire is hot, can it not be hot when blown out by the wind? Ha ha. Generally, there are two gears for hair dryers. The weak windshield is added with a voltage divider resistor, so the wind is less and the heat is less.

The current on the neutral and live wires of a single-phase device is the same current. This phenomenon indicates that the cross-section of the wire of the neutral wire and the live wire is not the same, and the cross-section of the wire of the neutral wire is too small.

The connection between the wire and the electric furnace wire must be pressed with screws and nuts, or riveted. The method of winding is useless. In addition, the neutral line and the live line are the same.

It has nothing to do with the line of fire and the zero line. Generally, the rated power of the electric furnace is large, and when the electric furnace works at high current, it is easy to cause the terminal port, due to the crimping is not real, the wire is oxidized, resulting in excessive contact resistance and overheating, causing the terminal to burn out.

High or low or corrugated. 2.The counter-path capacitance changes or there is a short circuit inside the line change.

3.The line frequency offset or line excitation pulse is insufficient, and the line push stage is insufficient or has large ripples. 4.

Inspect the tube spike absorbing element. 5.The quality of the replaced component is a problem.

As mentioned above, when the three-phase current is unbalanced, the excess current will be stuck on the zero line. The greater the unbalance, the greater the current of the neutral line, and if it exceeds a certain value, the neutral line will be burned off. 2.A large number of electrons.

If the main neutral wire is broken, it may burn the electrical appliances, we know that the voltage before the three live wires is 380V, which we call the line voltage, and the voltage between any live wire and the neutral wire is 220V, which we call the phase voltage. The electricity we usually use at home is 220V, but when the power supply bureau supplies power, the main line is three-phase and four-wire.

For example, there are three houses that need electricity, and in order to balance the three-phase current, these three live wires will be used for the three houses, phase A for room A, phase B for room B, phase C for room C, one for each of the three live wires, and only one for the zero line is for the three houses.

Once the main zero line is disconnected, these three live wires are connected to each other through the electrical equipment with their respective belts, and are connected in series into a circuit with a voltage of 380V.

Summary. Dear, hello, I'm glad to answer for you, the zero line burns out and causes the electrical appliances to burn out? A:

Not only will it burn the computer; If you use other household appliances, it will also burn; This is called an electrical appliance"Mass explosion"Phenomenon; Because the whole building generally uses three-phase four-wire power supply; After the zero line of a certain layer is broken, the three-phase load imbalance makes the zero point drift, which will make the zero line also live or cause the dual-purpose electrical appliances to become series connected to the 380 volt power supply through the zero line; At this point, the voltage will reach 380 volts; Thus burning out all 220-volt electrical appliances. Therefore, the construction requires that the zero line is not allowed to install a taekbreaker protector (fuse). As a user, once the zero line is broken, there is only the fire line at home.

As far as the whole building is concerned, the power supply is generally a three-phase five-wire system, because the zero line is connected to the whole building, and the live line is divided into ABC three-phase power supply ** each unit. If the neutral wire is disconnected at one point, the live wire will enter the socket through the neutral wire, which will turn the 220-volt socket into a 380-volt outlet. The voltage rises, so it burns out the computer or TV.

As soon as the neutral wire is broken, the two live wires are connected, so the appliance will burn out.

The zero line will burn out and cause the electrical appliances to burn out.

Hello, let you wait for a long time, is consulting information for your questions to answer, please be patient Dear, hello, I am happy to answer for you, the zero line burns out and causes the electrical appliances to burn out? A: Not only will it burn the computer; If you use other household appliances, it will also burn; This is called an electrical appliance"Mass explosion"Phenomenon; Because the whole building generally uses three-phase four-wire power supply; After the zero line of a certain layer is broken, the three-phase load imbalance makes the zero point drift, which will make the zero line also live or cause the dual-purpose electrical appliances to become series connected to the 380 volt power supply through the zero line; At this point, the voltage will reach 380 volts; Thus burning out all 220-volt electrical appliances.

Therefore, the construction requires that the zero line is not allowed to install a taekbreaker protector (fuse). As a user, once the zero line is broken, there is only the fire line at home. As far as the whole building is concerned, the power supply is generally a three-phase five-wire system, because the zero line is connected to the whole building, and the live line is divided into ABC three-phase power supply ** each unit.

If the neutral wire is disconnected at one point, the live wire will enter the socket through the neutral wire, which will turn the 220-volt socket into a 380-volt outlet. The voltage rises, so it burns out the computer or TV. As soon as the neutral wire is broken, the two live wires are connected, so the appliance will burn out.

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Dear, I'm glad to answer for you: the zero line is burned out, causing the electrical appliances to burn outA: The situation under normal conditions of the zero line in the line:

Why do you burn electrical appliances when the zero line is broken at home? Many old electricians are vague and unclear1 Therefore, when we work on electrical appliances at home, we rely on one of the phases of three-phase electricity to form a loop with the zero line to load electrical work, and when designing the power distribution system of the whole building, the problem of three-phase balance is fully considered, and there will be no problems in electrical work. 2. Our household voltage is 220V, that is, single-phase electricity, single-phase electricity is the phase wire taken from one of the live wires of three-phase electricity, and then a single working zero line, and the normal voltage between the live wire and the zero line is about 220V; In the case of the total zero line disconnection in the line:

Why do you burn electrical appliances when the zero line is broken at home? Many old electricians are vague and unclear.1 If the total zero line is disconnected, the original flow of current through the circuit of the line live wire zero line is destroyed, and the current no longer flows through the zero line, but is transmitted in the live wire; 2. At this time, there is a voltage shift, the lower the resistance, the greater the voltage, and the smaller the resistance; That is to say, at the beginning, the voltage of less household appliances is large, and the electrical appliances are burned out, and the voltage of many household appliances is small, and the household appliances cannot work normally and cannot be brought up. 3 At this time, the situation is that the fire line of the power distribution system of the entire broken zero line constitutes a loop, that is, all electrical appliances are connected in series on the fire line;

If there is no problem that the zero line is easy to burn, if the zero line is burned frequently, please check whether the selection of the zero line is appropriate.

There are several possibilities for what you are talking about:

1) The neutral cross-section is not enough, in the old specification the neutral cross-section is 1 2 of the phase cross-section, and the new specification is the same as the phase cross-section.

2) The three-phase load is seriously unbalanced, resulting in a serious drift of the neutral line current.

3) There are 3 harmonics in the system, and the 3rd harmonics will be superimposed on the zero line.

It is recommended that you find a professional to do a diagnosis of your system. Do not blindly replace the zero line, otherwise there may be greater hidden dangers to electrical equipment and electrical safety.

No. Generally, the zero line is too thin.

Answer: 1. The selection of the neutral cable may be small, and it should not be less than half of the cross-section of the main circuit cable.

2. The three-phase load is seriously unbalanced, resulting in zero point drift, which increases the neutral point voltage to the ground, so the current also increases, resulting in the ablation or ablation of the zero line.

It's connected, it's leaking, let's give it a good review.