Is the unit of transformer size KVA or KW?

We need to know the price of a transformer. The most important thing is to know its size and voltage parameters first.

The size unit of transformer is usually KVA (kilovolt ampere), but it is often expressed in KW (kilowatt).

So what's the difference between KVA and KW, and which one is more accurate for the transformer unit?

Kilo volt ampere (kVA) refers to a unit of capacity of electrical equipment (such as transformer, motor, etc.). In an AC circuit, voltage (kV) * current (A)=capacity (KVA). The capacity of the transformer is expressed in kilovolt amperes.

Rated capacity refers to the customary value of apparent power under main tapping. The capacity specified on the transformer nameplate is the rated capacity, which means that the tap changer is located at the main tap, and it is the product of rated no-load voltage, rated current and corresponding phase coefficient. For three-phase transformers, the rated capacity is equal to=3 × Rated phase voltage × Phase current and rated capacity are generally expressed in kVA or MVA. The actual output capacity is the product of the voltage with load (the voltage under load is less than the rated no-load voltage under inductive load), the rated current and the corresponding coefficient.

KW (kilowatt) is a unit of power. Kilowatt was mainly used in electricity in the early days, but now it has a trend to be extended to the power unit in the whole physics field. In electricity, kilowatt hour and degree are completely equal, but they are called differently. One thousand watt hours=1000 watts * 3600 seconds=3600 kilojoules=3600000 joules.

Kilowatt is usually used to express the power of generators, engines, motors, tools, machines, electric heaters, etc. It is also a commonly used unit to express the electromagnetic power of radio and television transmission towers.

The rated capacity of the transformer represents the guaranteed value of the output power of the transformer under the rated working conditions. It is the apparent power of the transformer, that is, the capacity of the transformer to output the maximum electrical power. The actual output power of the transformer cannot be confused with the capacity.

We know that transformers should be marked in KVA capacity units. Do you know how much KW a 100 KVA transformer corresponds to? How should we convert them? Please keep an eye on Shanghai Leilang, and we will answer your questions in the next article.

If you have a transformer procurement plan and do not know how to choose the right transformer, please contact us at any time. We will provide you with efficient and energy-saving power supply solutions combining professional electrical knowledge and rich production experience!