The phase line voltage is 450V, how much is the single phase?

The phase voltage of the three-phase electricity is 380V, and the voltage of the A-phase line of the three-phase electricity is 380V, and the voltage of the B-phase line is 380V, as long as the voltage of the load is also 380V, there is no problem;

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.

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.

Line voltage is the voltage between two lines of a multi-phase power supply system, taking three-phase as an example, the voltage between the three-phase lead lines of A, B and C is also known as the interphase voltage. The magnitude of the line voltage of the star connection is 3 times the phase voltage. The phase voltage of a delta power supply is equal to the line voltage.

In the three-phase generator star connection, the ends of the three windings are connected together to form a common end - neutral - neutral line. The transmission line connected to the three winding starts forms a phase wire, also called a live wire. The voltage between the (live wire) and the neutral wire is called the phase voltage u1.

The voltage between any two live wires is 380V. The phase voltage refers to the voltage between any phase (live wire) and the neutral wire, which is 220V, that is, the voltage between a live wire and the neutral line.

Three-phase voltage 220V is one, three-phase 380V is another, and there are other voltages; In addition, the frequencies are also available in 50Hz and 60Hz. At present, China's three-phase voltage standard is 380V, and the frequency between each phase is the same, and the frequency is 50Hz. Due to the use of star connection for residential electricity access, if China says three-phase 380V, it refers to the line voltage, and the phase voltage is 220V; If we say three-phase 220V, it refers to the linear voltage, and its phase voltage is 127V.

The law of calculation. The relationship between the line voltage and the phase voltage of the three-phase power supply is (taking the power supply side as an example):

1) For the triangle wiring, the line voltage is equal to the corresponding phase voltage;

2) For star wiring, the relationship between the line voltage and the phase voltage is UAB=UAN-UBN, UBC=UBN-UCN and UCA=UCN-UAN

If the phase voltage of the three-phase power supply is a positive sequence (negative sequence) symmetry group, then the three-phase line voltage is also a positive sequence (negative sequence) symmetry group. This pair of delta power (or delta load) is self-evident.

The phase voltage is 220 volts, and the line voltage is 380 volts.

When the phase voltage (between the live wire and the neutral wire) is 220V, the line voltage (between the two live wires) is 220V* which is approximately equal to 380V. The phase voltage is the voltage between any phase (live wire) and the neutral wire, which is 220V, that is, the voltage between a live wire and the neutral line. Although the voltage between any phase of the three-phase voltage (live wire) and the neutral line is 220 V, the phase difference between any two phases is 120 degrees.

Line voltage use is contraindicated.

When using phase voltage power supply, if there is a lack of neutral line, the grounding wire of the equipment can be used as the neutral line, but the grounding must be good (in general, in addition to the three-phase four-wire power supply, the equipment is equipped with a grounding wire). Regardless of whether it is an N line or a PE line, repeated grounding is used on the user side to improve reliability.

The load of the meter can be met by selecting inductance coils with different ratios. If the meter distribution inductor coil with a specification of 3x1 (2)A is used, and the conversion ratio of the inductor coil is 1:50, the maximum rated current that can be carried by each phase is 100A.

Question 1: What is the voltage of each line of three-phase four-wire electricity? Hello, The voltage between the three-phase four-wire phase wire and the phase wire is called the line voltage of 380V.

The voltage of each relative neutral line is called the phase voltage, and the voltage is 220V.

Hope mine is helpful to you

At the same time, I hope you can be in time

Question 2: What is the voltage of the three-phase four-wire system? Hard!

In the three-phase four-wire of the 10kV substation and distribution system, the voltage between the live wire on the low-voltage side (output) and the live wire is about 370 410V, and the voltage between the live wire and the neutral line is about 210 230V. In the three-phase four-wire of the 380V 220V substation and distribution system, there are about 210 230V between the live wire and the live wire on the low-voltage side (transmission), and about 110 130V between the live wire and the neutral line.

Question 3: What is the voltage of each live wire of three phase and four wires? The voltage of each live wire to the neutral wire is 220V, and the live wire to the live wire is 380V

Question 4: What is the line voltage? What is the phase voltage? The line voltage is 220V and the phase voltage is 380V

Question 5: How many volts is the most suitable for the three-phase four-wire line voltage The three-phase four-wire line voltage of 380 volts is the most suitable, which is the specified value.

Question 6: Why is the three-phase four-wire 380V? The so-called three-phase four-wire system refers to three phase wires plus a neutral wire, the line voltage is 380 volts, and the phase voltage is 220 volts, to put it bluntly, the voltage of two live wires is 380 volts, and the voltage of one live wire plus one neutral wire is 220 volts.

Question 7: What is the line voltage of China's three-phase four-wire current V The three-phase four-wire voltage is 220 380V. 380V between phases and 220V between phases and neutrals.

Question 8: Does three-phase electricity 380V refer to its phase voltage or line voltage? Three-phase electricity 380V refers to its line voltage 1, three-phase electricity 380V refers to the line voltage.

Line voltage refers to the voltage between the phase wires and the phase wires, whereas phase voltage refers to the voltage between the phase wires and the neutral wires. 2. For the triangular wiring power supply system, because the three-phase coils are connected end to end, the voltage (line voltage) at the head of the coil and the head of the other phase coil is also the voltage (phase voltage) at the end of the coil itself. 3、?

For star-wired power supply systems, the line voltage is a multiple of the phase voltage.

Question 9: What is the power of the three-phase four-wire phase voltage 380V current is 20A? Power p = 3 * phase voltage u * phase current i * power delay = line voltage * line current.

Line current = phase current.

Y-type connection: line voltage = 3 * phase voltage, line current = phase current.

Type connection: line voltage = phase voltage, line current = 3 * phase current.

If the triangle connection is the power supply: it could be 380V or 220.

If the load is connected in a triangle, the line voltage is determined by the power supply, regardless of the connection method of the load, which is 380V.

380V refers to the wire voltage, which is the voltage between the two phases (live wire).

The phase voltage is the voltage of each phase.

The line voltage and the phase voltage are the first three relationships of the phase signs. The line voltage of 380V is 220V.

From the formula of three-phase motor: p=

So the power p = kilowatts, cos is. The voltage is 380V.

When the three-phase alternator supplies power to the outside, the ends of the three groups of coils X, Y, and Z are connected together, and a line is drawn from the connection point, which is called the neutral line, also called the neutral wire. Then draw a wire from the other end of the coil winding, A, B, and C. In this way, a three-phase four-wire system is formed, and this connection method is called the star connection method.

The line voltage is 380V and the phase voltage is 220V.

The relationship between the line voltage and the phase voltage is: line voltage = phase voltage 3 times the root number. For mains, the phase voltage is 220V, and the line voltage is 3 times the root number of 220V, that is, 380V.

Line voltage = (root number 3) phase voltage For the three-phase four-wire power grid, the voltage between any two of the three phase wires is called the line voltage, and the voltage between the phase line and the neutral line of any one is called the phase voltage, and the phase difference of the three-phase voltage is 120 degrees, and the line voltage is the vector sum of the phase voltages of the two phases.

The voltage of any two phases in the three phases of A, B and C is 380V, that is, the combined voltage of the two electricity is 380V;

Any one of the three phases of A, B, C, plus the neutral line is 220V, which is often referred to as single-phase electricity, lighting electricity.

The phase voltage is the phase line to the neutral line voltage, 220. The line voltage is two phase voltages, 380V