What is the unit of kva?

It is a unit of capacity of electrical equipment (such as transformers, motors, etc.). In an AC circuit, voltage (kilovolts) * current (amperes) = capacity (kilovolt-amperes). The capacity of the transformer is expressed in kilovolt-amperes.

The rated capacity refers to the customary value of the apparent power under the main tap. The capacity specified on the transformer nameplate is the rated capacity, which means the tap changer is located at the main tap and is the product of the rated no-load voltage, rated current and the corresponding phase coefficient.

For three-phase transformers, the rated capacity is equal to =3×rated phase voltage×phase current, and the rated capacity is generally expressed in KVA or MVA. The actual output capacity is the product of the voltage with load (in the case of inductive load, the voltage with load is less than the rated no-load voltage), the rated current and the corresponding coefficient.

Extended information

A new round of rural power grid upgrade and renovation projects to "charge" a better life:

1. The distribution station area has a new look and the transmission lines are safe Reliable, the power slogans are eye-catching and standardized, and the newly replaced meters are neatly designed. A new round of rural power grid upgrade and reconstruction projects is bringing a new atmosphere to the countryside.

2. "With the voltage stabilized and the power sufficient, we dare to buy electrical appliances and truly live a new electrified life." Recalling the past life of using electricity, Secretary of the Party Branch of Zhao Village, Bishui Town Yang Junying was deeply moved. Nowadays, what you see are supermarkets, shops, dry cleaners, tall street lamps and neat and orderly poles and stations. Sufficient electricity makes villagers' lives more comfortable.

3. Implementing a new round of rural power grid reconstruction project, the average distribution transformer capacity per household increased from 1.3 kVA to 4.7 kVA, and the low-voltage line loss rate dropped to 6.1%. The average low-voltage power supply radius is shortened to 280 meters, all are insulated, the power supply reliability rate reaches 99.8, and the voltage qualification rate reaches 97, which greatly improves the power supply capacity and reliability.

Baidu Encyclopedia-KVA

People's Daily Online - "Charging" for a better life