380V air conditioner wiring, what is the use of the common neutral line empty tripping?

Try connecting the neutral wire from the upper port of the 220V leakage protector to the four-pin socket.

This shows that your switch is not empty open, is a leakage protection, want to solve this problem first to understand the principle of leakage protection, now the leakage protection is set up in the internal current transformer, the load line passes through it, when the electrical appliance is working, there is a current in the zero line of fire, but the direction is opposite, in the transformer can not sense the current signal, so the leakage protection works normally, when you use the outer line of three live wires, add a zero line below the leakage protection, when the air conditioner works, only the zero line has the current through the transformer, After detecting the transformer signal, the detection circuit inside the leakage insurance mistakenly thought that there was leakage, so it tripped.

There are two main reasons for the air conditioner tripping, one is the thermal protection of the press, and the other is that the temperature resistance of the inner pipe is bad.

1. The fuse in the special circuit of the air conditioner is blown out, or the contact of the power switch is poor, or the power supply is out of phase, many families only use one power supply, which will cause abnormal power supply due to the abnormal operation of other electrical appliances.

2. The power supply used by the air conditioner is too low, when the voltage is less than 10% of the single-phase normal voltage of 220V, that is, 198V or below, the refrigeration compressor in the air conditioner is difficult to start.

3. The knob on the temperature controller is not dialed to the appropriate position, such as dialing to a higher position, when the power supply is connected, the temperature in the air conditioning room has not reached the upper limit of the set temperature, and the compressor can not start running.

1. Check the cause of the fuse blowing inside and outside the air conditioner, and take measures to prevent it from blowing again, which should be adjusted and repaired in time. It is recommended that households with air conditioners should set up a special power supply to basically prevent the air conditioner from tripping.

2. If the local power supply voltage is often in a low state, it should be used with reliable power supply regulation, and at the same time, it is recommended that families with more household appliances should use special power supply for power supply.

3. Adjust the knob on the temperature controller to the required position, that is, adjust it according to the temperature required by the air-conditioned room.

The reasons for the tripping of this kind of switch are: there is leakage phenomenon in the line behind the switch or the current flowing through the switch is greater than the maximum value of the switch.

About leakage: Since the machine is turned on for a period of time before tripping, it means that there is no leakage in the entire line and the air conditioner at the beginning. If it is caused by leakage, then it is very likely that the condensation of the air conditioner during operation causes the air conditioner to leak.

However, qualified air conditioner condensate will not cause air conditioner leakage (which is very difficult).

Regarding excessive current: this problem is most likely the cause of the trip. After the air conditioner runs for a period of time, the whole line heats up, and when the heat is large, then the temperature of the switch will rise, resulting in a decrease in the current allowed through the switch.

When the switch is hot enough, then the switch trips.

Based on the above analysis: 80% of the switches in your home are small, and you can change to a larger switch. You can touch the switch in your house and see if it's hot before jumping. If it's hot, it definitely is. If it's not hot, it's the reason for the air conditioning.

1. A short circuit in the air conditioner will also cause the air conditioner to trip as soon as it is turned on; Check for exclusions.

2. The air conditioning line is reversed, resulting in the air conditioner tripping due to excessive current; Timely maintenance.

3. The starting current of the air-conditioning compressor is too large, causing the air-conditioner to trip; Replace switches with large loads in a timely manner.

4. Air conditioning leakage: focus on detecting whether there is leakage of air conditioning components, and whether the insulation layer of each connecting line is corroded and leakage; Timely repair or replacement.

5. The air conditioner switch is damaged and the air conditioner trips as soon as it is turned on: replace the switch in time.

When the air conditioner trips as soon as it is turned on, it means that it is caused by excessive current caused by the internal fault of the air conditioner, and the following are three reasons that may cause the air conditioner to trip when it is turned on, I hope it will help you.

1. If it trips in a few seconds as soon as the machine is turned on, it may be that the varistor on the circuit board is broken, the voltage is unstable and the varistor is bad, or the circuit board is short-circuited or the cross-current fan motor is faulty;

2. If you turn on other functions such as air supply and do not trip, it means that there is a problem with the fan or compressor of the outdoor unit;

3. Consider the air switch, because the carrying current will not reach the nominal value after the air switch is effective, please do not deal with it yourself, it is best to find a professional air conditioner maintenance personnel to deal with it.

What is the matter with the three-phase four-wire tripping as soon as the zero line is connected? Hello dear, 1. Turn off all the switches and pull out all the electrical plugs, including the basement and other places that you don't pay attention to. 2. Close the main switch to test whether the main circuit is intact, if it is no longer tripped, it means that the main circuit is intact.

If it trips, it proves that the problem is in the main circuit, and it is necessary to further disassemble the line to find it in different areas, and it is recommended to find a professional electrician. 3. After the main circuit is powered, the power is transmitted one by one, and the interval between each switch is half a minute. After the switch is sent, plug the electrical cords into the wall socket one by one, and each plug is plugged in half a minute apart.

If a trip occurs when a switch is closed or an appliance is plugged in, the leakage point has been found. When the cause of tripping is found, a leakage circuit breaker is used for leakage protection in the line with a rated voltage of 230V 400V and a rated current of 63A. When someone is electrocuted or the leakage current of the circuit exceeds the specified value, the leakage circuit breaker can automatically cut off the power supply to ensure personal safety and prevent accidents caused by leakage current in the equipment.

Since the air is turned off and the live wire is cut off, there will be no power on the neutral and ground wires under normal circumstances.

However, if there is leakage in the power line, it is difficult to say, and it may also be that the neutral or ground wire is still live.

The three-phase four-wire trips as soon as the zero line is opened, which may be due to the following reasons:

1.The problem of the air opening itself: the quality and performance of the air opening will affect its working state. If the contact of the empty opening is poor or the internal components are damaged, the empty opening may fail, and the zero line will be tripped.

2.Circuit short circuit: When the neutral line is connected, if there is a short circuit in the circuit, that is, there is a short circuit between the wires or a short circuit between the wires, which will lead to excessive current, and the contact section will open the trip protection mechanism to avoid damage to the circuit.

3.Excessive load: When the load is too large, it may also cause the neutral line to open and trip. For example, when some electrical equipment itself is overloaded, or when multiple high-power devices are started at the same time, the circuit will be overloaded, triggering the air-open trip protection mechanism.

4.Circuit unbalanced: In a three-phase circuit, if the voltage or current of the three phases is unbalanced, it may also lead to the tripping of the neutral line of the empty open connection. In this case, it is necessary to check the balance of voltage and current in the three-plex comma phase to rule out the problem of unbalanced circuits.

In short, the tripping of the three-phase four-wire air opening as soon as the zero line is connected may be caused by the quality of the air opening itself, the circuit short circuit, the excessive load or the circuit unbalance, etc., and the specific situation needs to be analyzed and judged in order to find a suitable solution. In order to ensure the safety and reliability of the circuit, it is recommended that the professional electrician carry out the overhaul and maintenance.

If you trip as soon as you connect the zero line when you connect the three-phase electricity of the air conditioner, there may be the following reasons:

1.Wiring error: Please make sure you have connected the three phase wires (L1, L2 and L3) correctly and connect the neutral wire (N) with the neutral wire on the power junction box of the **air conditioner.

2.Short-circuit by-side or grounding issues: Check for short-circuited wires or ground-related issues. There may be wire damage, poor wire contact, short circuit inside the junction box, etc. These issues can cause excessive current, causing the trip protection device to trigger.

3.Overload Problem: Is the power supply line of the air conditioner able to withstand the current load of the air conditioner?

If the rated current of the power line is less than the current load of the air conditioner, then it may cause tripping when the air conditioner is started. You can check the rated current of the power line and the forehead rubber current of the air conditioner to make sure they match.

When dealing with this issue, I suggest you take the following steps::

1.Check the wiring: Double-check all wiring to make sure there are no faulty or loose connections. In particular, it is necessary to check that the neutral line (n) is connected correctly.

2.Troubleshoot short circuits or grounding issues: Check the power lines and the junction box of the **air conditioner to see if there are any short circuits or ground-related issues. If there is damage or a short circuit, it must be repaired or replaced.

3.Consider the capacity of the wire: check the rated current of the power line and the rated current of the air conditioner to ensure that the power line can withstand the load of the air conditioner. If the power line is not strong enough, it may need to be redesigned or increased in power line capacity.

If you're new to electrical work, it's best to consult a professional electrician for inspection and fixing to be safe.

**Air conditioning three-phase electricity, it should be only that the family does not need to connect to the zero Sun Ran line, and it may be connected to the ground wire (the protection line refers to Kaisan)!

You can take a look at the air conditioner wiring instructions and wire them according to the regulations.