For the selection of transformer capacity, we should follow the following principles: the capacity of the transformer cannot be too large or too small. If the capacity of the voltage regulator is selected too large, it will cause the transformer to be in a no-load state for a long time, which will increase reactive power loss and cause waste of the transformer itself.

In addition, considering the cost of purchasing transformers, choosing transformers with excessive capacity is also a waste that outweighs the benefits. If the selected transformer capacity is too small, it is easy to cause serious consequences such as transformer burnout. Therefore, how to correctly select transformer capacity is an important link in energy conservation and loss reduction in the power grid.

So how should we choose the capacity of a transformer?

The selection of transformers should follow the principle of “small capacity, dense distribution points”. The transformer should be located at the center of the load, and the power supply radius should be around 0.5 kilometers. For power supply and lighting, the selection of transformers for the manufacturing industry should consider the simultaneous power of the electrical equipment. Transformers can be installed at around 1.5 times the load.