When you are in a hurry to install a 380 volt air conditioner, there is a problem of no power in a l

This is most likely a problem with your air opening and your fan turning because it is using 220V voltage. When the empty open is in operation for a period of time, it may be the prostration of the main touch, forming a certain phase section of electricity.

Possible reasons for this situation:

There was no problem with the air conditioning.

Power supply by question:

It may be caused by the use of the process power supply inlet line to burn or empty open the safety abnormality.

1. The power supply incoming line is out of phase (disconnection), and the measured line voltage can be determined. The electric tester cannot be determined because of the influence of induced voltage.

2. The power supply incoming line is grounded in one phase, and the measured phase voltage can be determined, and the electric detector cannot be determined because of the influence of induced voltage.

After it is confirmed, the power outage can be connected.

It shouldn't be a matter of empty opening.

If you check the wiring of the air conditioner, will one of the live wires be connected and touch the ground wire (or through the internal conductor to the ground). If the empty opening with leakage module is not the reason.

The air conditioner has such a function, at a certain temperature, the air conditioner's thermometer will automatically measure the temperature, for example, you set 10 degrees. After 4 hours of continuous operation, the temperature in the room had dropped to about 10 degrees. The function of the thermometer is to detect this temperature and directly enter the energy-saving mode, so only the fan rotates.

In this case, I see, there is no problem with the wiring and air conditioning.

It's a matter of the incoming line! The phase without electricity is not in good contact. When there is no load (empty opening and closing), there is an induced voltage, and when there is a load, the voltage almost all of the voltage drops to the contact defect.

The fan is still rotating because it is an inertial load, and it will run if it lacks phase, while the automatic protection is generally thermal protection with a certain time delay.

By: Not addicted - probationary period Level 1 8-13 21:33

Makes sense.

I have carefully analyzed your question, if I understand what you mean. Then your problem is very complicated, it is difficult to determine which part is wrong without being on the scene, and besides, you did not explain what is used to judge whether there is electricity or not, electric detector? Voltmeter?

If you don't mind, I want to tell you a simple and stupid way to directly determine whether it is a problem with the incoming line or the problem with the outgoing line: disassemble the air conditioning wire, and connect a high-power 220V consuming electrical appliance directly on the phase where you measure the problem. Of course, you can also directly short-circuit the phase line and the neutral line to see if it trips

I think there is more than one fault in this place, because, since there is no power in that phase, there must be a disconnect somewhere. Or grounding. However, if it is a power supply open circuit, the phase should also be electrified, because the phase loss load will cause the neutral point to shift, some people say that the lack of direction can not run, well, since it can not run, then, the phase of electricity sent to the **?

Is it grounded? If it is grounded, then why is there no action in the empty opening?

If the problem is solved, please tie the knot, I'm interested.

Check the air opening, now there are a lot of air opening quality problems, maybe the middle contact point is not good, try another one;

Then check whether the three-phase voltage of the total incoming line is 380 volts, if not, it is a problem with the main incoming line, and you should ask a professional to check and repair.

Before the dead live wire before your incoming switch, there is a poor contact of the joint, and you can find it by measuring it all the way along the line! 111111111

10000 live wire virtual connection, I once installed a Haier 71 opportunity to the same problem, when the external machine is not running, that's right, as soon as it starts, the virtual connection of the wire is no power!

There may be a problem with the switch, there may also be a problem with the air conditioner, listen to me say that the master said that the 3-phase Gree air conditioner, when connected, the 3-phase must be connected, otherwise, the air conditioner will not start.

It should be a problem with the incoming line, and we will have to look at the specifics.

Blue is the working zero line, yellow and green are zero or grounding protection, and yellow, green and red are live wires. The yellow, green, and red fire lines represent the phases of ABC, and in the three-phase system, it is stipulated that B lags 120 degrees compared with phase A, and C lags 120 degrees compared with phase B, so there is a problem of phase order. The three phases a, b, and c, are represented by yellow, green, and red, respectively.

If the office building and other places have introduced three-phase electricity but it is a single-phase electrical appliance to pay attention to, do not connect the two live wires casually, must ensure the same phase. As for the issue of phase sequence, it depends on the specific electrical appliances, if it is an electric heating equipment, it doesn't matter, if it is an electric motor, the phase sequence is wrong, and the direction of rotation of the motor is reversed.

The phase sequence of ABC, BCA, CAB is the same, while the phase sequence of CBA, ACB, BAC is the opposite of the previous three. The phase sequence can be measured with a phase sequencer, that is, one is assumed to be phase a, and then B and C are determined

That is to say, if the three-phase live wire of the three-phase electric air conditioner is out of order, and the air conditioner only blows air, does not cool or heat, then replace any two-phase live wire of the yellow, green, and red three-phase live wire.

You remove the 380 volt power socket, install a 25 32A double air switch, one of the incoming wires above the air switch is connected to any 380 volt live wire, and the other is connected to the zero wire, and the output interface below the air switch live wire and neutral wire are directly connected to the power cord of the air conditioner.

Or connect the live wire and neutral wire of your current 220-volt air conditioner to the original three-phase electric power socket, but to connect it correctly, the live wire of the current air conditioner is connected to any one of the 380-volt live wires, and the neutral wire can be directly connected.

In life, some electrical appliances need to use 220V voltage, and some electrical appliances need to use 380V voltage. So what is the difference between two different voltages? For most friends who are not from a professional class, it is indeed a difficult problem to understand.

In layman's terms, explain this from the point of view of practicality in life.

1. The vast majority of residential electricity consumption, including rural villagers' household electricity, is 220V. No matter how many air conditioners are installed in the house and how many electrical appliances are used, they all use 220V voltage. Most of the 380V voltage is used for industrial electricity, enterprise and enterprise electricity, high-power commercial electricity and other electricity consumption.

2. In daily life, it is distinguished from the following two perspectives:

1) Distinguish from indoor sockets: whether it is a 2-pin socket or a 3-pin socket, a voltage of 220V is used. The vertical hole in the upper part of the three-pin socket is grounded. Of course, you can also see four-pin sockets on some occasions, and this one uses a voltage of 380V.

2) Distinguish a bunch of switches in the household distribution box from the air switch of the incoming distribution box, in fact, this is just using a voltage of 220V, and the power supply (3) comes in from above, the red is the live wire, the blue is the neutral line, and the yellow-green is the ground wire.

The so-called 220V is the voltage between the live wire and the neutral wire, the live wire comes from the low-voltage side winding of the transformer, and the neutral line comes from the neutral point of the low-voltage side winding, and the neutral point will be connected to the earth near the transformer (we call it grounding), so sometimes we measure the voltage between the live wire and the ground wire is also 220V. The so-called 380V voltage means that the voltage between any two live wires is 380V, and the measured voltage between any live wire and the neutral line is 220V, which is the difference between 220V and 380V voltage.

Now the electrical equipment that uses 380V voltage (we call it three-phase electrical appliances) requires the use of three-phase power supply, which is the three live wires from the A B C terminal of the secondary side winding of the transformer, and there is a phase difference of 120 degrees between the three live wires.

Remove the 380 volt power socket and install a 25-32A dual air switch, one of the incoming wires on the air switch is connected to any 380 volt live wire, and the other is connected to the neutral wire.

The air conditioning socket should choose a special socket 16a. High-power electrical appliances such as air conditioners must be equipped with special sockets (that is, 16A sockets), which are very different from 10A sockets. 16A is generally a 3-eye plug, and the hole spacing is large; The 10a is a 5-eye plug, which can be inserted into a 3-eye and 2-eye at the same time.

Usually these two types of sockets are not universal.

Three-phase one-zero-one, if there is no dedicated ground wire, it is three-phase one-zero, but it is not suitable to use a socket in this case, right?

What is a line voltage and what is a phase voltage.

The voltage of 220 volts is phase electricity, which is a low voltage below 250 volts.

It's low voltage above 250 volts is high voltage, 380 volts is the wire version of the electric right, no live wire is 380 volts, and 220 volts is not, it has a neutral line. The voltage is generally at the bottom, and there is no big harm to people, and 380 volts is different, if you are beaten, there may be a danger to your life, but there is no 380 volts in household electricity, the highest voltage in household electricity is 250 volts, and it is low voltage in household electricity

First of all, 220 volts and 380 volts are two very different things, 220 volts are two phases of electricity, a live wire. 380 volts is three-phase electricity, three live wires. It cannot be mixed.

Yes, take a live wire and a ground wire is 220V, and the transformer in the residential area is 380V three-phase alternating current, and then distribute it evenly to the family in three ways.

As long as it is a four-wire or five-wire system of 380 volts, if it is a three-wire system, then you can change it from the place where the lead wire starts, leaving a 380 line, and the other two lines, one of which is connected to the zero line and one to the protective ground wire, then it is OK.

Take a wire directly in 380V and connect it to the 0 wire. There is no problem at home, but if it is a company with a large P air conditioner that is always on, it is best to do it back to 380.

Definitely not, connect a regulator hemp.

Stable transformer.

Or you can take a wire directly in 380V and then connect it with the n wire.

It makes up 220V.

Are you mistaken, how can the family leave a voltage of 380V, 380V is the power of electricity, and it will not enter ordinary users.

The electricity used in life is 220V, and the 380V is power electricity, which will only be used in some factories, I guess you are mistaken.

Take a wire directly in 380V, and then connect it with the n wire (neutral line).

It makes up 220V.

A live wire with a neutral wire.

Yes, take a live wire and a ground wire is 220V, and the transformer in the residential area is 380V three-phase alternating current, and then distribute it evenly to the family in three ways.

1.It cannot be used.

2.In China, 380V power supply refers to three-phase power supply, 380V air conditioner, and its main component compressor is three-phase alternating current, that is, the compressor motor is a three-phase motor. 220V single-phase power supply, there is only one phase line of the power supply, which cannot drive the motor of the three-phase electric principle, and the phase is missing.

Hello, the plugs are not the same.

It doesn't matter if it's plugged in, the air conditioner has a power management system.

Question: Several wall-mounted air conditioners, and the circuit boards are burned.

**Can't see a problem with the air conditioner.

But I'm afraid that there are hidden dangers.

Want to know which part will have the problem and which part to check.

Question: A few of the ones that have been burned have been repaired, **The air conditioner has not been burned, big brother, you look at the problem carefully, answer the question, if you burn it, it is best to read it all After all, it is caused by a large voltage I don't know which piece is the problem.

It is possible to take one of the phases of electricity.

No, it will burn out.

What should I do if Gree air conditioner is changed from 38V to 220V.

Generally, the 4 terminals in the 380V socket are wired, three of which are thinner than three live wires, and the upper one is a thicker zero wire, when using this kind of plug and socket, it is necessary to look at the rated voltage of the electrical appliances, which is a single-phase 220V must be connected to the zero line and one to the live wire when the plug is connected; The rated voltage is a two-phase 380V electrical appliance, and both plugs must be connected to the live wire; The rated voltage is three-phase 380V electrical appliances, and the three wires of the plug must be connected to the live wire.

If you just use this "plug socket" and connect it to the single-phase 220V power supply at home, it can be used, 25A is big enough, no problem.

For an air conditioner with a 380 volt power supply, you need to apply to the power company for a 380v three-phase electric power supply, and 220 is a single-phase electric supply.

The 380 is generally commercial, unless you find the power supply bureau yourself and install a 380 power supply

Replace the air conditioner, it is a bit troublesome to apply for three-phase electricity, and you have to pay a fee, and the specific charges are different from place to place, and it may cost thousands of yuan.

Go to the power supply bureau to apply for the installation of three types of electricity.

Buy an inverter and change it yourself.

Abnormal, phase wire leakage or circuit breaker damage. Power outage repairs!

Based on what you said, there is no problem.

The three air openings can play a role in the protection of short circuit and overload.

It is not allowed to install any form of brake, insurance and other equipment on the main zero line, in order to prevent the zero line from being broken, so that the one-way equipment is connected in series under the power voltage and burns the electrical appliances. The current connection is correct.

As a power source, the generator must be absolutely isolated from the mains power supply to prevent reverse power transmission. A nine-wire gate can be installed, and the binding post of the middle handle is connected to the load side; The upper and lower binding posts are connected to the power supply of the mains and the generator, that is, the mains and the power generation can only choose one of the two.

The neutral line of the generator can be directly connected to the main neutral line, and there is no need to install switches.