How to know the power factor of a transformer? For example, what is the actual capacity of a 500KVA

It is the ratio of the input power of the transformer to the nominal capacity, see the calculation method in the annex for details.

The power factor of a transformer is related to its magnetizing current, and the higher the magnetizing current content in the primary input current, the lower the power factor. The magnetizing current should be minimized. (There are also special requirements for magnetizing current in special cases).

You don't need to check this, the attached figure is the calculation method of the power factor of the transformer.

For a 500kVA transformer, its actual capacity is 500kVA, that is, the output power.

If the nominal value is 500kw, then his actual output power should be multiplied by its power factor.

Reactive power does not consume energy, it is just possession, and the ugly point is "that is, to occupy the pit and not, hehe".

The easiest way you can test u2i2 uii1 is the secondary power and the primary power.

Approximately equal, ignoring the transformer's own loss, the transformer's own loss is counted as active power.

If you know the loss, then you can use (secondary power + transformer loss) primary side power.

The 500kw transformer should have a distribution room, and a distribution cabinet. There is a power factor meter and a power meter on the distribution cabinet.

The calculation is as follows:You can look at the active and reactive energy meters, and calculate the power factor of the current month by the active energy meter in kilowatt-hours and the reactive energy meter kvar.

Calculate the power factor of the current month's electricity consumption, some enterprises factory power distribution system is not equipped with power factor meter, power meter, no reactive power compensation equipment, just equipped with voltmeter, ammeter, active energy meter, reactive power meter, so it is more difficult to calculate the power factor.

Introduction:

Power refers to the amount of work done by an object per unit of time, i.e., power is a physical quantity that describes how fast or slow work is done. The amount of work is constant, and the shorter the time, the greater the power value. The formula for finding power is power = work time.

Power indicates the physical quantity of how fast or slow the work is done. The work done per unit of time is called power and is denoted by p. Therefore, the power is equal to the scalar product of the force and the velocity of the point where the object is stressed.

The power factor of a transformer is determined by the power factor of the load. According to the power factor of each load, the active and reactive power of each load are calculated separately, and then all the active and reactive power are added respectively, and then the apparent power is obtained, and the ratio of active power to apparent is the total power factor, that is, the transformer power factor.

If the capacity of the power transformer is denoted by s and the output active power is denoted by p, then the power factor cosa p s.

When the power factor side source is 1, 1kva=1kw.

KVA is the capacity in a transformer.

KVA is the apparent power, and its magnitude is related to the power factor.

The active power P, the reactive power Q, and the apparent power S have the following relationships.

p=s cos (cos is the power factor).

q=s×sinφ

s square = q square + p squared.

Dear, I am glad to answer for you: is the power of the transformer the capacity of the transformer? Answer: The capacity of the transformer is expressed in the apparent power unit kva (kilovolt amperes), which indicates the output capacity of the transformer.

The unit of capacity of a transformer is Va or KVA, etc., while the unit of power is W or kW, etc., of course, the power here refers to the active power. The capacity of the transformer is composed of two parts, namely active power and reactive power, so when someone provides the power of the transformer in kW, it is necessary to judge whether the power represented here is the capacity of the transformer or just the active power of the transformer, if it is active power, the capacity of the transformer needs to be obtained according to the coefficient. Do you understand this?