Transformer Capacity Calculation and Rated Current Calculation (2)

1. The rated capacity of the transformer should be the maximum apparent power of the transformer that can ensure the normal operation of the transformer under the specified operating conditions.

2. This apparent power is the output power of the transformer, and it is also the apparent power that the transformer can carry with the maximum load.

3. When the transformer is in rated operation, the output apparent power of the transformer is equal to the rated capacity.

4. When the transformer is in rated operation, the input apparent power of the transformer is greater than the rated capacity.

5. Due to the high efficiency of the transformer, it is generally believed that the input apparent power of the transformer is equal to the rated capacity when the transformer is in rated operation, and the calculations and results are basically accurate.

6. Therefore, when using the transformer, it is safe to observe that the current, voltage, power factor, and apparent power output by the transformer are equal to or less than the rated capacity (when the conditions of use are met).

7. Some people think that the transformer has losses and must operate below 90% of the rated capacity is wrong.

8. When designing and selecting the capacity of the transformer, it is correct to multiply the safety factor according to the calculated load.

It can be seen that the calculation of the transformer capacity is not difficult. It is mainly to pay attention to some problems in the calculation of transformer capacity.