What is the meaning of phase voltage vs line voltage, what is line voltage and phase voltage?

Hello:— 1. The phase of the three-phase power supply,a、b、cBetween the three lines of fire.

mutualThe difference is 120 degrees of electric angle380vVoltage, refers to:

The voltage between the phase wires (live wires).

The voltage between any of their live wires and the neutral point is220v

Both areRoot number 3relationship.

2. Please see the attached drawing, you can understand it very clearlyPhase voltage (220V) vs. line voltage (380V).The relationship between them.

What is Line Voltage and Phase Voltage? Keep these five lines in mind.

Simply put, the line voltage is the voltage between the line and the neutral line. The phase voltage is the voltage between any two of the three phase wires.

China's civil electricity is supplied by three-phase four-wire system. The three phase lines are commonly known as the fire line, and the middle line of the other line is commonly known as the zero line.

The phase voltage is the voltage of the three live wires and the neutral wire, which is also the AC 220V used in our family;

The line voltage is the voltage between the three live wires, which is industrial electricity and AC 380V. For example, three-phase motors, three-phase electric freezers, and some high-power electrical appliances need to use this voltage.

Take three-phase sinusoidal alternating current as an example: It is applicable to both generators (power supply) and motors Line voltage refers to the voltage between the two-phase power lines; Phase voltage refers to the voltage experienced by each phase winding;

There are two ways to connect the winding: star connection and triangle connection;

So from the above definitions of line voltage and phase voltage, the following conclusions can be drawn:

Star connection: line voltage = phase voltage 3 times the root number (because the phase difference of sinusoidal three-phase alternating current is 120 degrees to each other);

Delta connection: phase voltage = line voltage.

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

2. The voltage between any phase wire and the neutral line in the three live wires is called phase voltage UA, UB, UC, and the voltage between the three phase wires and the neutral wire is 220 volts in China's low-voltage power supply system.

The voltage between the three phase wires is called the line voltage. In a symmetrical three-phase system, the magnitude of the line voltage is a multiple of the phase voltage. In China's low-voltage power supply system, the line voltage is 380 volts.

Line voltage refers to the voltage between the two lines of the multi-phase power supply system, taking the three-phase as an example, the voltage between the three-phase lead lines of A, B and C is also known as the line voltage.

Phase voltage refers to the voltage at both ends of each phase of a three-phase power supply or three-phase load.

The magnitude of the line voltage of the star connection is 3 times the root number of the phase voltage. The phase voltage of a delta power supply is equal to the line voltage.

For alternating current, the phase voltage is the voltage between either phase line (live wire) and the neutral line, which is 220V. Three-phase alternating current has three phase voltages: the voltage of the three is the same, the frequency is the same, and the phase difference between them is 120°.

The voltage between any two phase wires, known as the line voltage, is 380V. Three-phase alternating current has three phase voltages, so there are also three line voltages: the voltage and frequency of the three line voltages are the same, and the phase difference between them is 120°.

For the three-phase four-wire power grid, the voltage between any two of the three phase wires is called the line voltage, the voltage between the phase line and the neutral line of any one is called the phase voltage, the phase difference of the three-phase voltage is 120 degrees, the line voltage is the vector sum of the phase voltage of the two phases, and the relationship between the line voltage and the phase voltage is: line voltage = phase voltage of 3 times the root number. For mains, the phase voltage is 220 volts, and the line voltage is 3 times the root number of 220 volts, i.e. 380 volts.

Line voltage: The voltage between the phase wires and the phase wires, for example, the voltage between the three phases A, B, and C, the voltage between phase A and phase B, the voltage between phase A and phase C, and the voltage between phase B and phase C are the line voltage. That's what we say in our daily work"Phase-to-phase voltagePhase voltage

Refers to the voltage at both ends of each phase of a three-phase power supply or a three-phase load.

In general: the three-phase power supply is represented by yellow, green and red wires, the neutral wire is usually represented by the blue wire, and the ground wire is usually represented by the yellow and green two-color wires, which is the basic common sense of the wire and power supply.

Three-phase four-wire system.

In the power supply network, the voltage between the live wire and the neutral line of each phase is the phase voltage. For example, in a three-phase four-wire system with daily low-voltage power supply, the line voltage is 380V and the phase voltage is 220V.

The line voltage is equal to three times the phase voltage of the root number. 380v=√3×220v。For the load, when the load is triangular connection, the line voltage is equal to the phase voltage.

When the load is made a star connection, the line voltage is equal to three times the phase voltage of the root number.

1.Phase voltage: The voltage at both ends of each phase of a multiphase power supply or multiphase load.

2.Line voltage: It is the voltage between two lines of a multiphase power supply system.

3.For example, in a three-phase circuit, the voltage between the three-phase lead wires A, B, and C is also known as the line voltage, and the voltage between A and the neutral line N is the phase voltage.

4.The relationship is as follows: the magnitude of the line voltage of the star connection is 3 times the root number of the phase voltage. The phase voltage of the delta connected power supply is equal to the line voltage.

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. (An example of voltage is shown in the figure below).

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. For a star power supply (or star load), taking a positive sequence symmetry group as an example, there are:

uab=uan-ubn=√3uan

ubc=ubn-ucn=√3ubn

uca=ucn-uan=√3ucn

The magnitude of the line voltage of the star connection is 3 times the phase voltage.

Three-phase alternating current has three phase voltages: the voltage of the three is the same, the frequency is the same, and the phase difference between them is 120°. The voltage between any two phase wires, called the line voltage, is 380V.

Three-phase alternating current has three phase voltages, so there are three line voltages: the voltage and frequency of the three line voltages are the same, relative to alternating current, the phase voltage is the voltage between any phase line (live wire) and the neutral line, that is, 220V. Three-phase alternating current has three phase voltages:

The voltage and frequency of the three are the same, and the phase difference between them is 120°.

1.Phase voltage: The voltage at both ends of each phase of a multiphase power supply or a multiphase depletion load.

2.Line voltage: It is the voltage between two lines of a multiphase power supply system.

3.Taking the three-phase as an example, the voltage between the outgoing wires of A, B, and C is also known as the line voltage, and the voltage between A and the neutral line n is the phase voltage.

4.The relationship is:

The magnitude of the line voltage of the star connection is 3 times the root number of the phase voltage.

The voltage in the phase liquid of the delta connected power supply is equal to the line voltage.

The relationship between phase voltage and line voltage.

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 line voltage.

The voltage between any phase wire and the neutral wire in the three live wires is called the phase voltage UA, UB, UC. In the low-voltage power supply system, the voltage between each of the three phase wires and the neutral wire is 220 volts.

The voltage between the three phase wires is called the line voltage. In a symmetrical three-phase system, the magnitude of the line voltage is a multiple of the phase voltage. In a low-voltage power supply system, the line voltage is 380 volts.

In the three-phase generator star connection, the ends of the three windings are connected together to form a common end - neutral - neutral wire. 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.

1. Line voltage.

Line voltage) is the voltage between the two lines of the multi-phase power supply system, taking the three-phase as an example, the three-phase lead lines of A, B, and C are the voltages between each other, and they are also known as line voltages. The magnitude of the line voltage of the star connection is the phase voltage.

3 times the root number. Triangle.

The phase voltage of the power supply is equal to the line voltage. Brother Tachibana Zheng.

2. Any phase wire in the three live wires.

The voltage between the neutral line is called the phase voltage UA, UB, UC, and in China's low-voltage power supply system, the voltage between the three phase wires and the neutral line is 220 volts.

The voltage between the three phase wires is called the line voltage. In a symmetrical three-phase system, the magnitude of the line voltage is a multiple of the phase voltage. In China's low-voltage power supply system, the line voltage is 380 volts.

1. In the three-phase four-wire circuit, the voltage of the phase line and the center line is the phase voltage.

2. The voltage between any two phase lines is the line voltage; The line voltage is 3 times that of the phase voltage.

3. The current flowing through each phase load is the phase current; The current flowing through the phase is a line current.

4. The phase voltage is the voltage of each phase of three-phase alternating current relative to the ground, and the line voltage is the voltage between every two phases of three-phase alternating current; For example, the civil low-voltage electricity is generally 380V, the line voltage between each two phases is 380V, and the phase voltage is 380 220V, and the residents generally use 220V single-phase electricity, and the low-voltage power electricity used by enterprises and institutions is generally 380V three-phase electricity.

Expand knowledge: 1. The capacity of the three-phase transformer SE=3 * the capacity of each phase = 3 * phase voltage * phase current.

2. Three-phase transformer three-phase: when the star is connected, the phase voltage = 1 3 line voltage, phase current = line current.

3. When the triangle is connected, the phase voltage = line voltage, and the phase current = 1 3 line current.

4. Therefore, no matter which connection method, the capacity of the three-phase transformer SE = 3 * line voltage * line current.

5. So with Li, there is the above formula you said. Usually the rated voltage and rated current of the transformer we call refer to the line voltage and line current.

732 is the divisor of 3.