Can you use a two phase circuit with a voltage of 380V?

380V voltage cannot be used with two-phase circuits.

220V is the phase wire.

live) and ground (neutral).

380V is the voltage between any two phase wires (live wires) in a three-phase circuit, and 220V should be increased to 380V in a three-phase four-wire system.

In the power supply circuit, any two phase wires (live wires) can be taken, and only the step-up equipment (step-up transformer) can be used to change the voltage in the single-phase line.

The electricity that is transmitted from the power plant to the city passes through the transformer and is three-phase and four-wire electricity. You can find four wires hanging side by side on the pole, one of which is a neutral wire, the term is neutral (n), and the other three wires are called live wires. The voltage between the two live wires is 380V, and the voltage between a neutral wire (N) and either live wire is 220V

If you live in a building in the city, you can also see that three live wires and one neutral wire are reasonably distributed among the units. If you live in a unit with a lot of electrical equipment such as air conditioners and other electrical equipment, the power load.

If it is too large, use a voltmeter.

The measured voltage is significantly lower than that of other units with low power consumption. Seriously cause the electrical appliances to not start and run normally.

No! Although ordinary motors can be used on single-phase or two-phase power supplies after being modified by adding capacitors and other methods, their power will be greatly affected, and it is impossible to reach the original rated power. The three-phase motor inside the air conditioner is working at full power when running, coupled with the pressure of the compressor, the requirements for the motor power are higher, and the power of the air conditioning motor can not be reduced at all, so it is impossible for the air conditioner to change from three-phase electricity to two-phase or single-phase use.

You can use random take a live wire to the zero line.

Yes, but it depends on what you want to use it for, and there are now two 380 fans.

You can use a control transformer.

220V appliances cannot be used at 380V.

If the electrical appliance with a power supply voltage of 220V is connected to the 380V power supply, the electrical appliance will be damaged due to overvoltage. The power supply voltage of electrical appliances has a permissible working range, generally 10%, especially the maximum working voltage value has stricter regulations, if it exceeds this range, the electrical voltage can not work.

Precautions for using voltage:

1. The voltage transformer should be activated once and then twice, and the opposite should be done when it is deactivated.

2. When deactivating the voltage transformer, the voltage transformer should be considered to be protected by the volt pin and automatic device, and the relevant protection and automatic device should be deactivated in order to prevent the possibility of misoperation. It should also be considered that the AC voltage transfer switch of the faulty microwave should be invested in the operating bus voltage transformer.

3. When the voltage transformer is out of service or overhauled, its secondary should be separated, and the secondary fuse should be removed to prevent reverse power transmission.

4. The secondary parallel switch of the voltage transformer running with the double bus should be disconnected during normal operation, and the secondary switch of the voltage transformer should be put into operation after the bus tie switch is running and the room is not automatic, in order to prevent the voltage from bearing too large the unbalanced load of the voltage transformer. At the end of the inverted bus, the parallel switch is deactivated before the bus tie switch is changed to automatic. <>

This depends on whether the inverter has a phase loss protection function, if so, the inverter will report a fault and stop the output; If not, the inverter can use two-phase 380V power supply, however, this will greatly shorten the service life of the inverter, no matter what, or according to the actual allowable working conditions of the inverter, which is the safest, but also conducive to the inverter to give full play to its efficiency.

Frequency converters.

If there is a phase loss protection inverter, it can not directly use two-phase 380V power supply without changing the internal parameters, and the two-phase 380V power supply can be used by changing the internal parameters (individual brands cannot use two-phase 380V power supply due to the internal circuit structure cannot change the parameters), and the inverter without input phase loss protection function can directly use two-phase 380V power supply.

No, the three-phase input inverter requires three-phase power input, and the internal three-phase is rectified.

Generally, it can't, and the lack of phase is protected, and it doesn't work.

<> three-phase electricity is composed of three live wires and a neutral wire (neutral wire), and the voltage of any of the three live wires with the neutral wire is 220V. Industrial electricity and civil electricity are both 380 220V power supply systems, but civil 220V is only one of the phases. The so-called 380V uses 2 phase wires at the same time, such as using both red and blue phase wires, at this time, for example, red is 220V, plus blue (because the alternating voltage is about 160V at this time), the voltage is 380V.

The other 2 items, blue-green, red-green, the same is true, so the three-phase is 380V

The single-phase voltage is 220 volts which is the RMS value of the single-phase sine wave, while the three-phase voltage is three-phaseSuperposition of 3 sine wave voltage waveformsThe effective value, the phase (time difference) of the electric sine wave of the a, b, and c3 phases is 120 degrees apart, and the mathematical sum of ua+ub+uc. From the waveform, you can see that you need to have a foundation in mathematics, electricity, and physics, don't worry, when you go to junior high school, it will be easy to understand with the above foundation. You can also study on your own online.

In fact, they are all the same power supply system, the power plant produces three-phase electricity, each relative to the neutral line or ground wire, is 220, because the neutral line and the ground wire are 0V, and between each live wire, because the voltage of each live wire has been changing, so their reference point for each live wire is no longer 0V, but the voltage of another live wire, at this time the sum of the two is 380V. The household electricity is only used together with a live wire in this and the neutral wire, and the neutral line is actually connected to the neutral wire of the transformer output, and the end of the neutral wire is grounded, so the neutral wire and the neutral line are theoretically 0V, of course, in fact, because there is resistance and current on the neutral line, the current is multiplied by the resistance, and it will show a lost voltage on the neutral line, which is about one or two volts, which is negligible.

In three-phase electricity, the relationship between the line voltage and the phase voltage is the relationship of the root number three, so the line voltage is 380V, which is three times the root number 220V.

The phase difference between any two phases in a three-phase electricity is 120 degrees. The voltage between the two phases is a vector combination, i.e. sin120°

Because 220 is a live wire, also known as single-phase electricity, the line voltage is 220, and two live wires, their phase voltage is 380 volts.

The three-phase power supply has three live wires and one neutral wire.

The voltage between the live wire is 380V. This is the voltage of industrial electricity.

The voltage between the live wire and the neutral wire is 220. This is the voltage of electricity used by residents.

To use the knowledge of complex number [phasor], because the phase difference is 60 degrees, the sum of the two phasors is 380

The single-phase voltage is 220 volts. Why is the three-phase voltage 380 volts?

Because the three-phase voltage is 380 volts, and the single-phase voltage is relative to the ground voltage, the difference between the two is three.

380v。The voltage of the three-phase electricity is 380 volts, which refers to the voltage between the phase electricity and the phase electricity. Three-phase electricity has a zero wire and three live wires, the voltage between any live wire and the zero line is 220 volts, if it is household electricity, the voltage is 220 volts can meet the daily needs, in this case, as long as one of the live wires and the zero wire can be drawn out.

Precautions for wiring three-phase sockets.

1. During the wiring of the three-phase socket, the cable should be checked in advance to see whether the cable and copper wires are interlocked, so as to ensure that there will be no poor circuit contact or even short circuit after wiring, so as to avoid affecting the normal use of electrical appliances due to circuit short circuit after wiring.

2. In the case that household appliances are not grounded, they cannot be grounded by themselves, and the neutral wire is not allowed to be used as the ground wire, because in the case of the three-phase socket current is out of balance, the neutral wire and the socket shell are electrified, once the neutral wire is broken, it will not only lead to the normal operation of the power system, but also cause safety accidents.

The method of turning 220V single-phase electricity into 380V three-phase electricity is as follows: use a single-phase motor to bring a three-phase asynchronous motor, and connect three non-polar capacitors (the withstand voltage value is above 450V) into a triangle and connect them on the three-phase asynchronous one, you can output three phases, of which two phases are 380V, and one phase and the shell are 220V. Three-phase alternating current is a form of transmission of electrical energy, referred to as three-phase electricity.

Three-phase AC power supply is a power supply composed of three alternating currents with the same frequency, equal amplitude, and 120° difference in phase. Three-phase alternating current has many uses, and most of the alternating current electrical equipment in the industry, such as motors, use three-phase alternating current, which is often referred to as the three-phase four-wire system.

Hello dear, why is the single-phase 380V electrical equipment not called two-phase 380V? There are only single-phase electricity and three-phase electricity in China's power supply mode, and there is no two-phase electricity. Why is it said that the power supply mode composed of two live wires is called single-phase 380V, instead of two-phase?

Because the power supply line composed of L+N has only one 220V voltage, it is a single-phase 220V; The power supply liquid travel line composed of L1+L2 has only one 380V voltage, so it is single-phase 380V; However, there are three currents (voltage waveforms) in the power supply line composed of L1+L2+L3, and they are in different phases, with a difference of 120°, that is, there are three voltages, so it is three-phase 380V. Therefore, 380V single-phase equipment is single-phase 380V, not called two-phase. Hope it helps.

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