Three phase four wire leakage protector? How many amps are there for 3 phase 4 wire leakage protecto

The line voltage of the three phases is 380 and the phase voltage is 220. The three phases are generally distinguished by the three colors of yellow, green and red. You can use the yellow line and the neutral line (neutral) to connect the 220V air open.

Use the green wire and the neutral wire to connect the switch?? Did you miss something and didn't make it clear? The phase wire and neutral wire can be connected to the bipolar switch at the same time, but you didn't say that if the single-pole switch is connected at the same time, it is a short circuit.

Any phase and neutral wire is 220, after the 220 comes out, it is best to connect a circuit breaker and then use, and the direct phase wire can also be used, but after all, the electricity is safe. You can understand it yourself, and you can use it yourself. To use it for others, it must be done safely.

The shell should not be connected to zero, unless it is a TN system, if you want it to trip through the short circuit of the neutral line, unless the current is very large, otherwise it will not jump, and if the neutral line is live, it is very dangerous if the shell is connected to zero, then the neutral line can not be leaked, because the current is leaked, so it will not act phase line leakage protection, and then the shell is directly grounded.

You can't connect it like this, you can't connect the zero wire to the shell, so that the leakage will not trip, if the base is in contact with the floor, the brake will not be closed. You are a three-phase three-wire motor, you need to use three-phase three-wire leakage protection. Then, the enclosure is grounded.

If you are not mistaken, it is because the short circuit caused by him is at the input end of the leakage protector, not the output end, so it is not protected by the leakage protector and can cause a fire. However, the protector generally does not burn, which may be due to a short circuit, resulting in the wire arc burning! The damage of the arc is very powerful, and it is important to pay attention to it

How to wire the three-phase four-wire leakage protector?

Starting from 25 amps and going all the way up to 630 amps.

The difference between three-phase three-wire leakage protection and three-phase four-wire protection is that the three-phase three-wire does not contain the neutral line to protect the three-phase leakage when the three-phase leakage occurs, and can only be used with a three-phase parallel motor. It is usually used in three-phase motors. The three-phase four-wire also includes the neutral line to protect the three-phase leakage or the neutral line when it hits the ground, which is usually used in single-phase motors and single-phase lighting.

Summary. The role of the N-line in the three-phase four-wire leakage protector.

Hello dear, the three-phase four-wire leakage protector n stands for the neutral line.

n is the meaning of the neutral wire terminal. Generally, there are three kinds of identification on the leakage protection switch, which are alpha identification, digital identification, and no identification. The so-called letter identification is the letters L and N, L stands for the live line, and N stands for the zero line.

The digital identification refers to the sign that there will be Arabic numerals on the three circuit breakers, generally speaking, the numbers are connected to the live wire, and there are signs at the position of the incoming wire. At the location of the outgoing line is the sign of .

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The role of the N-line in the three-phase four-wire leakage protector.

The role of the N line in the three-phase four-wire leakage protector Hello dear, the three-phase four-wire leakage protector N represents the neutral line. n is the meaning of the neutral wire terminal. Generally, there are three kinds of identification on the leakage protection switch, which are letter identification, digital identification, and no identification.

The so-called letter identification is the letters L and N, L stands for the live line, and N stands for the zero line. The digital identification refers to the sign that there will be Arabic numerals on the three circuit breakers, generally speaking, the numbers are connected to the live wire, and there are signs at the position of the incoming wire. In the position of the outgoing line refers to the eggplant is the sign of .

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What role does the neutral line play in the three-phase four-wire leakage protection.

What role does the zero line play in the three-phase four-wire leakage protection, if the three-phase four-wire leakage switch is not connected to the zero line calendar, when the leakage phenomenon occurs, it will not trip, and can not play the role of leakage protection. The neutral line of the three-phase four-wire leakage switch must be connected in order to play the purpose of leakage tripping, because the decoupling coil power supply of leakage tripping is taken from one of the phases and the neutral line in the three-phase wire. If there is no zero line, it will lose the role of leakage switch, and the three-phase four-wire leakage switch is the increase of the current of the zero line when the leakage is made, so that it trips, and it will not become a leakage switch if there is no zero line.

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The differences between the two are as follows:

1. The three-phase three-wire system is to use only three phase wires; The three-phase four-wire system is three phase brother missing wires plus one zero wire.

2. The three-phase three-wire system is a connection method of three-phase AC power supply, which leads out 3 wires from the ends of 3 coils, and connects the tail ends of 3 coils together, also known as star wiring, and the commonly used symbol "Y" indicates that this way of leading out 3 wires for power supply is called three-phase three-wire system. If 1 Yuyuan wire is also drawn from the connection point at the end of the 3 coils, the power supply mode of 4 wires is called the three-phase four-wire system.

3. Three-phase four-wire has one more power neutral wire than three-phase three-wire, three-phase three-wire can only provide 380 volt voltage power supply, three-phase four-wire can provide both 380 volt voltage and 220 volt power supply. Three-phase three-wire obviously saves money, but when the load is unbalanced, it cannot be fed back through the zero-phase current, and it is easy to burn things, and the three-phase four-wire can solve this problem.

Three-phase four-wire leakage protector is generally a device used for leakage protection of three-phase circuits. Its function is to monitor whether there is leakage in the three-phase circuit, and cut off the power supply when leakage is detected to protect the safety of the person and the operation of the equipment. In a three-phase four-wire circuit, there are usually three live wires (L1, L2, L3) and a neutral wire (N).

The leakage protector needs to be connected to the three-phase live wire and neutral wire in order to work properly to detect the leakage current. Therefore, the three-phase four-wire leakage protector needs to be connected to the three-phase live wire to realize the leakage protection function to ensure the safe operation of the circuit.