1. Try to select low loss, high efficiency energy-saving transformer

2. Select the transformer with reasonable capacity according to the load

3. The average load factor of transformer shall be greater than 70%

4. When the average load factor is often less than 30%, small capacity transformers should be replaced as appropriate

5. Improve the load power factor to improve the transformer’s ability to transmit active power

6. Reasonably allocate the load to minimize the number of transformers in operation