How do you explain the KVA of the power system? 10

KVA refers to the unit of apparent power and is pronounced "kilovolt-ampere". The apparent power is expressed in s.

The active power p (watts) is equal to s (volt-ampere) multiplied by cos and the reactive power q (lacking) is equal to s multiplied by cos.

In electrotechnology, the product of the voltage and current rms value of the end button of a single port network is called apparent power, which is denoted as s=ui. Obviously, the apparent power is equal to the average power only when the single-port network is completely mixed with resistors, otherwise, the apparent power is always greater than the average power (i.e., active power), that is, the apparent power is not the actual power consumed by the single-port network. To make a difference, apparent power is not measured in watts (W), but in volt-ampere (VA) or kilovolt-amperes (kVA).

KVA (kilovolt amperes) is a unit of apparent power.

Apparent power is the product of voltage and current in a circuit with resistance and reactance.

The guaranteed value of the output capacity of the transformer in the rated state is expressed in kilovolt-ampere (kVA) (volt-ampere VA and megavolt-ampere MVA are not commonly used), because the transformer has a high operating efficiency, usually the rated capacity design value of the primary and secondary windings is equal.

The guaranteed value of the output capacity of the KVA transformer in the rated state is expressed in kilovolt-ampere (KVA) (volt-ampere VA and megavolt-ampere MVA are not commonly used), due to the high operating efficiency of the transformer, the rated capacity design value of the primary and secondary windings is usually equal.

KVA = kilovolt-ampere kilovolt-ampere.

KVA (kilovolt amperes) is the unit of total power, K refers to the number 1000, V isVolts, a yesAmps。Generally, it refers to the capacity of the equipment (transformer) and is used as a measurement standard for power.

The guaranteed value of the output capacity of the transformer in the rated state is expressed in kilovolt-ampere (KVA) (volt-ampere VA and megavolt-ampere MVA are not commonly used), because the transformer has a high operating efficiency, usually the rated capacity of the primary and secondary windings is equal to the value of orange rock.

Uses of kVA:

The capacity specified on the nameplate of the transformer is the rated capacity, which means that the tap changer is located in the main tap, and it is the rated no-load voltage and rated current.

The product of the corresponding phase coefficients. For three-phase transformers, the rated capacity is equal to = 3 rated phase voltage and phase current, and the rated capacity of jujube limbs is generally expressed in kva or mva. The actual output capacity is the voltage (inductive load) when there is a load.

, the voltage at load is less than the rated no-load voltage).

Summary. Hello Dear Hello is a pleasure to serve you according to your questions. 1. KVA is a unit of electricity, which represents the capacity of electricity, that is, the rated capacity of electrical appliances.

2. KVA is called kilovolt-ampere, which is a unit of measurement for electric capacity, which is equal to 1000 volt-ampere. 3. In the power system, KVA is usually used to indicate the rated capacity of generators, transformers, motors and other electrical appliances, and is used to indicate the maximum electric energy load they can carry.

Hello Dear Hello is a pleasure to serve you according to your questions. 1. KVA is a unit of electricity, which represents the capacity of electricity, that is, the rated capacity of electrical appliances. 2. KVA is called kilovolt-ampere, which is a unit of measurement for electric capacity, which is equal to 1000 volt-ampere.

3. In the power system, KVA is often used to indicate the rated capacity of electrical appliances such as generators, transformers, and electric mobile phones, and is used to indicate the maximum electrical load that it can carry.

Qinqin KVA and KW (kilowatt Hengyou) are both units of power capacity, but KW represents the actual power of the electrical appliance, while KVA indicates the apparent power of the electrical appliance.

KVA and KW are different in concept, function and conversion method, and the specific differences are as follows.

First, the two concepts are different.

1. KW refers to kilowatts, which is a unit of power, and in the early days, it was a unit of power for electricity.

2. KVA stands for kilovolt-ampere. It refers to a unit of capacity of electrical equipment (such as transformers, motors, etc.). In an AC circuit, voltage (kV) * current (A) = capacity (kVA). The capacity of the transformer is expressed in kilovolt-ampere.

Second, the two have different roles.

1. kw is the early power unit of electricity, and there is a tendency to extend to the power unit in the entire field of physics. Electrically, kilowatt-hours are exactly equal to degrees.

2. KVA is the apparent power, which refers to the capacity of the equipment (generally the transformer); The capacity specified on the nameplate of the transformer is the rated capacity, which means that the tap-changer is located in the main tap, which is the product of the rated no-load voltage, the rated current and the corresponding phase coefficient.

3. The conversion method of the two is different.

kW = 1,000 watts = 1000 joules (joule) seconds (second); 1 kW = 1,000 Newton·meter seconds (n·m s); 1 kilowatt = kilocalorie seconds (kcal s); 1 kW = horsepower.

2. The transformer capacity is calculated as follows: (a), which can be calculated directly by multiplying the current on the low voltage side (a). (That is, the KVA capacity of the transformer is directly multiplied by the no hole or the rated current value of the transformer is obtained).

1. KVA is kilovolt ampere: kilovolt ampere (KVA), generally refers to the unit of rated capacity of power equipment (such as transformer, motor, etc.) in the power system, where the rated capacity indicates the guaranteed value of the output power under the rated working conditions, for the transformer is the early regret power, and for the motor refers to the active power.

The units are volt-ampere (VA), kilovolt-ampere (KVA), and megavolt-ampere (MVA), and the decimal relationship between the three is 1MVA=10 KVA, and 1KVA=10 VA.

2. KA is kiloampere: kiloampere, which is the unit of current in the circuit.

The units are amperes (a), kiloamperes (ka), and trillion amperes (ma), and the base relationship of the three is 1ma=10 ka, and 1ka=10 a.

The guaranteed value of the output capacity of the transformer in the rated state, expressed in kilovolt amperes (kVA).

1. KVA = kilovolt-ampere kVA.

2. Due to the high operating efficiency of the transformer, the rated capacity design value of the primary and secondary windings is usually equal.

3. KVA is the capacity in the transformer, KVA is the apparent power, and its size is related to the power factor! The active power p, the reactive power q, and the apparent power s have the following relationship: p=s cos (cos is the power factor) q=s sin, s squared = q square + p squared.

4. Kilowatt-hour is what is usually called "degree", which is the unit of electric work, symbol: kw·h, and the calculation formula is power multiplied by time. Suppose the power of a power-hungry device is 2500 watts, that is, its power consumption in one hour is kilowatt-hours, which is one hour of electricity.

5. The utilization of electrical energy is the main symbol of the second industrial revolution, since then human society has entered the electric age, electric energy is a physical quantity that indicates how much work is done by electric current, electrical energy refers to the ability of electricity to do work in various forms (so it is sometimes called electric work). It is divided into direct current energy, alternating current energy, high-frequency electric energy, etc. All of these electrical energies can be converted to each other.

KVA = kilovolt-ampere kilovolt-ampere The guaranteed value of the output capacity of the transformer in the rated state, expressed in kilovolt-ampere (kVA) (volt-ampere VA and megavolt-ampere MVA are not commonly used), due to the high operating efficiency of the transformer, the rated capacity design value of the primary and secondary windings is usually equal. It is the capacity in the transformer kva for the apparent power, and its size is related to the power factor! The active power p, the reactive power q, and the apparent power s have the following relationship p=s cos ( is the power factor) q=s sin s square = q square + p square For example:

The power factor cos = the active power is p=1kw then tg =, so the square of the apparent power s = the square of p + the square of p*tg i.e. s = when the power factor is 1, 1kva = 1kw

KVA is the apparent power of the transformer;

Apparent power has power and no power.