Why x former rating in kva

It means, 11kVA transformer rating means it can handle 11kVA. It is our turn to transform and utilize the 11kVA as 11kW we can do it by improving the power factor to 1 in case of pure resistive load which is not predictable and even very hard to get in case of inductive and capacitive loads where the power factor would have different values.

From the above example, it is clear that the rating of the transformer is same 11kVA but different output in power 11kW and 6. So these are the exact reasons for transformer rating in kVA instead of kWA. Good to know:. You may also read about:. I understand your logic Mukesh Khatri. However, its a technicality to distinguish between real, apparent and reactive power.

There are other instances where units are renamed to simplify rewriting the base units. In this case they rename the unit to distinguish between the types of power. Again I am little bit confuse about the unit of Transformer. Dear Mukesh Khatri. Then the unit becomes Watt…. Why not to write Watts? Watt is a unit of real power or actual power…i. Look…There are three kinds of Power. Active Power, Re-active Power and Apparent power. Should was not it in Watts.

Also this is not a technical answer [ as we have already given. So the unit of apparent power is volt-ampere. W and VA are the same, they are both power. VA unit is just used for apparent power to discriminate from the real power unit W , if we use the unit watt W, for both apparent and real power, how would somebody what power you are referring to?

The stator copper losses are 0. If i want to install a kva generator set, how can i choose the rating of the transformer t be installed? Can anybody help me please! Pls Answer this Q…. What is the current of an V, KVA stands for kilo-volt-ampere, which basically is the unit of electric power.

While calculating kVA of any piece of equipment the power factor is not taken into account. This means kVA is the unit of measurement for that equipment in which the output power is independent of power factor. On the other hand, KW KiloWatts is also the unit of electric power for that equipment in which power factor plays a role. Normally machines that produce a mechanical output is rated in kilowatts. For example the rating of electric motors.

Read More about power factor. Transformers are an energy transfer device that transfers power from the primary side to the secondary side without altering the energy level considering zero power loss.

Iron loss and copper loss occurring in the transformer are also independent of the power factor. Moreover, the output power factor of the transformer purely depends on the connected load. The transformer does not alter the power factor of its output power. Transformers are rated in kVA because the losses occurring in the transformers are independent of power factor.

KVA is the unit of apparent power. It is a combination of real power and reactive power. Large facilities and industrial processes require substantial amounts of power, and they need dependable transformers to convert the energy coming from the power plant into a form they can use for their equipment and building utilities.

Transformers convert energy from the source to the power required by the load. To use their transformers effectively, businesses need to know how much power their particular transformers can give them.

The transformer typically consists of two windings, a primary and secondary winding. Input power flows through the primary winding. The secondary winding then converts the power and sends it to the load through its input leads. When a piece of electrical equipment malfunctions, the transformer is often the culprit.

If not, you run the risk of frying your valuable equipment. How do you choose a transformer size? Fortunately, sizing your transformer is relatively simple. It involves using a straightforward formula to generate your kVA requirements from the current and voltage of your electrical load. VA stands for volt-amperes. A transformer with a VA rating, for instance, can handle volts at one ampere amp of current. The kVA unit represents kilovolt-amperes, or 1, volt-amperes.

A transformer with a 1. The electrical load that connects to the secondary winding requires a particular input voltage, or load voltage. We could say that an example load voltage V must be volts. You can look at the electrical schematic to determine this number as well.

In the example above, you would multiply by 50 to get 7, and then divide that number by 1, to get 7. The last step is to convert the figure in kilowatts to kilovolt-amperes. You can also work backward and use the known kVA of a transformer to calculate the amperage you can use. If your transformer is rated at 1. Your transformer will allow you to run it with up to 60 amperes of current. If the idea of performing calculations when you need to figure out kVA seems daunting or unappealing, you can always turn to charts.

Many manufacturers supply charts to make determining the correct kVA easier. Request a Transformer Quote.