How to convert three phase electricity into two phase electricity without a neutral line

1.Piling ground wire (zero line), the wire diameter of the ground wire is determined by the load, and the depth of the material is required, and 220VAC is composed of a live wire and a ground wire, but it is not safe and not suitable for long-term use; 2.Purchase a 380VAC transformer to 220VAC transformer, pay attention to the secondary current to meet the needs of use; 3.

Two single-phase voltage regulators are connected in series, one is used as a reactor and the other outputs 220VACs; It is also possible to use a transformer and a voltage regulator to complete the output of 220VAC 4Directly purchase a three-phase voltage regulator, which can be adjusted to 220VAC; 5.Self-made autotransformer, the principle is the same as the voltage regulator, the difference is that the voltage regulator voltage is variable, but once it is adjusted, it is meaningless, the autotransformer is the output of a fixed voltage.

You can choose according to the materials available to you.

There must be a zero line on the construction site. There is no zero line is the problem of your construction team, the use of the ground line bar is high energy consumption, not to mention the efficiency is not large, the machine with two phase wires can not stand it, and the efficiency of the transformer is not very good. If you want to use it easily, you can borrow the zero line from other construction teams.

1 directly with 2 fire, is 380v 2 one is connected with the live wire, and the other is grounded 220v

If you really need a neutral wire, you can use a 10mm diameter wire to bury it deep in the wetland.

The power is not very large, you can use a 380 to 220 transformer.

The work is sure that the zero line does not have the zero line construction team problem, the line bar energy consumption is high and the efficiency is said, and the machine with two phases is subjected, and the transformer efficiency wants to use the simple construction team to borrow the zero line.

The full name of three-phase electricity is three-phase sinusoidal alternating current. The magnitude and direction of sinusoidal alternating current periodically change from moment to moment according to the sinusoidal curve, and the three phases are evenly arranged according to the time sequence, which is quite harmonious and very regular.

The figure above is a chronological waveform diagram of a three-phase electric. Positive above the horizontal axis (power is sent to the load), zero is the magnitude at the horizontal axis, and negative below the horizontal axis (return power). At a certain time, AC is powered by two phases and returned by B phase; At a certain time, phase A transmits power and returns from the other two phases; At some point, the AB two-phase power transmission is returned by the C phase; Or phase B is powered, phase A is powerless, phase C returns, and then A is sent in the opposite direction (return), while BC is sent out in both phases.

In a word, the three-phase circuit is not connected to the neutral line load, and the electricity can be used normally.

The voltage phase change on the three phase lines of three-phase alternating current is exactly 120 ° different from each other, simply put, at the same time, the voltage on the three phase lines is actually not the same, the voltage between the lines is always high and low, positive and negative, when connecting high voltage and low voltage, there will always be current passing through, so a certain current can always be formed between the three phase wires, so between the three-phase lines of three-phase alternating current, it is not necessary to connect the zero line to form a loop and generate current.

It may flow from one phase to two other phases, or it may flow from two other phases to one, constantly changing over time.

Three-phase electricity can be compared to three independent sets of coils, the ends of the three coils are connected together, if a wire leads out of the connection, this wire is a neutral wire (also known as a neutral wire).

The head of the three coils is the power supply of the three-phase electricity we use, and any coil and the neutral wire constitute the 220 volt power supply we use; If you don't use the neutral wires and only the other wires, then the three coils are looped to each other because their ends are already connected together.

<> can use the triangle connection on the right side of the above figure, the triangle connection has a condition, which requires the three groups of load power to be equal, and the electrical appliance can withstand 380V line voltage, such as a three-phase motor.

The three wires of three-phase electricity are related to each other, not three independent lines, they are loops between each other. Sometimes it is necessary to connect a ground wire on the transformer side, but mainly because the load of the three wires is different, keep the zero point and not drift, so as not to affect the other two wires.

No, there is a loop between each two phases, and there are two ways: star connection and angular connection.

There is a voltage difference of 380 volts between each two phases of three-phase electricity, so any two phases can form a 380 volt circuit.

A circuit can be formed between any two phases of the three-phase electricity.

Sinusoidal three-phase alternating current ABC with current from A to B (or C), from B to C (or A), and from C to A (or B). The direction of the current is alternating.

Hope it helps.

Only when the load is connected can a real circuit be formed.

How does the sedan form a circuit that is not connected to the zero line, I think you should have to take a look at this, he should have a certain specific line, and then form a circuit, which can be better connected.

There is no neutral line for three-phase electricity, and you can use Y-type connection, connect a transformer, connect a frequency converter, and connect a series resistance to 220V.

1. Y-type connection.

This connection method can be used when changing 380V to 220V and connecting a lot of single-phase equipment. Note: Single-phase loads must be divided into three equal groups by power and load type, and must be started at the same time.

Second, connect a transformer.

If the single-phase load cannot be divided into three groups equally, or cannot meet the requirements of starting and working at the same time, this method can be adopted, and a 380V transformer needs to be purchased to 220V. When buying a transformer, you must choose the appropriate capacity, and the capacity of 2kw single-phase equipment must be more than 2 transformers.

3. Connect a frequency converter.

The use of inverters can also be used to change from 380 volts to 220 volts, but the cost is relatively high.

Fourth, series resistance.

If the single-phase equipment is not very powerful, then a resistor can be stringed, or 380V can be turned into 220V. Then, when changing 380 volts to 220 volts, can it be achieved by grounding as a neutral line, that is, making a grounding device, and then pulling a wire from the ground as a neutral line.

Of course, this method is also possible, but it is extremely harmful, not only there is a risk of electric shock, but also because the current passes through the grounding device for a long time, the grounding body is corroded by electrochemicalization, resulting in the grounding resistance becoming larger, the ground wire can not play a protective role, and the neutral point of the neutral line drifts, so it is not recommended to use.

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.

In daily life, single-phase power supply, also known as lighting electricity, is mostly used. When lighting electricity is used, one of the three phases is used to supply power to the consumer, such as household appliances, and the other wire is the fourth wire in the three-phase four-wire, that is, the neutral line, which leads from the neutral point of the three-phase electricity.

There are 2 kinds of power sources that we commonly use, one is 220 volts for household single-phase electricity and the other is 380 volts for industrial electricity. However, many three-phase batteries do not provide a neutral line. It is certainly very simple to use a transformer, and it is actually possible to obtain a 220-volt power supply for temporary electricity without the help of other equipment.

Summary. The voltage of any two phases of a three-phase electricity is 380V, and the voltage of a live wire and neutral wire is 220V. If you need to use a voltage of 220V, and there is no neutral line, you need to use a transformer that changes from 380V to 220V.

If you need three-phase electricity, you can connect the three-phase at will, and if you find that the motor is reversed, you only need to replace any two phases.

How to connect the three-phase electricity without a neutral line.

Glad you asked, are looking for relevant information, be patient.

The voltage of any two phases of a three-phase electricity is 380V, and the voltage of a live wire and neutral wire is 220V. If you need to use a voltage of 220V, and there is no neutral line, you need to use a transformer that changes from 380V to 220V. Or connect a live wire and the neutral wire is grounded (this method is for reference only, because when there is a leakage protector, the neutral wire is grounded, and the empty opening will cut off the power supply).

If you need three-phase electricity, you can connect the three-phase at will, and if you find that the motor is reversed, you only need to replace any two phases.

Do the math how much it will cost you to renovate your home

Three-phase electricity is three-phase alternating current, is composed of three currents, the size and frequency of these three currents are the same, and the initial phase will be 120 ° different from each other, it is a very common form of transmission in the industrial fiber industry, which is widely used, three-phase electricity has three wires, four wires, five wires, each kind of wire is different, for example, three-phase three-wire are live wires, there is no zero line, so what to do if there is no zero line for three-phase electricity? Let's take a look at it with the experts of Qeeka Home.

1. What should I do if there is no zero line for three-phase electricity.

Three-phase electricity has no zero line need to use star connection to wiring, after the connection of each electrical terminal voltage is 220V, in order to use normally, but pay attention to the problem of center point suspension, generally three-phase electrical appliances are in normal operation, the potential of the center point is 0, once an electrical appliance is burned, the center point potential will be offset, not 0 potential is very dangerous.

Second, the key points of household electricity safety.

1. Cut off the power supply of electrical appliances in time.

Home TV and other electrical appliances in the use of Jane Ou must be turned off in time, not only to turn off the electrical switch, but to unplug the power plug, if it is inconvenient to plug in and unplug the electrical appliances, you can install a socket with a switch, only need to turn off the socket switch is equivalent to disconnecting the power supply, can avoid electrical appliances have been in a state of power and heating, but also to avoid being struck by lightning in lightning weather to cause damage to electrical appliances, and even lead to disasters.

2. Avoid children touching the socket.

In the home space, basically each functional area will have a socket, especially in the living room area, its electrical products are many and concentrated, naturally need to configure more electrical products, if there are children at home, you should pay more attention to the location and design of the socket, the socket position can not be relatively low, if it is relatively low, there must be a protective cover design.

Summary: The above is about the three-phase electricity without zero line what to do, as well as the introduction of household electricity safety precautions, I hope the content shared can give you some reference, if you want to know more about relevant knowledge, you can **** Qijia Home to consult.

Enter the area and get the decoration for free**].

Let's look at the single-phase generator first, which is a coil that leads out two 220 volt wires to connect the load, and there is no zero or fire.

If a certain wire is grounded, it is called a neutral wire, and a wire that is not grounded is called a live wire.

If 3 single-phase generators supply power to the outside world, 6 wires are required to make separate circuits.

In order to save transmission costs, one end of three single-phase generators can be connected together as a common circuit, and if this utility line is grounded, it is called [common neutral line]. The other 3 live wires can be combined with the utility circuit to supply external power.

If the 3 groups of coils are placed in a generator at an angle, it is called a 3-phase generator, and one end of the 3 sets of coils is connected together as a common circuit in order to save costs.

Therefore, as the question [how to change a zero line of three-phase electricity], the power transformer of three fires and one zero, just like a three-phase generator, connects one end of the three groups of coils together, and then grounds at the same time, which is the zero line of the transformer.