Choose a transformer based on load conditions:

1. When there are a large number of primary or secondary loads, it is recommended to install two or more transformers. When any of the transformers is disconnected, the capacity of the remaining transformers can meet the power consumption of the primary and secondary loads. The primary and secondary loads should be concentrated as much as possible and not too scattered.

2. A special transformer should be installed When the seasonal load capacity is large. For example: the load of air conditioning refrigerators and electric heating loads in large civil.

3. A special transformer should be installed When the concentrated load is large, such as large heating equipment, large X-ray machines, arc furnaces, etc.

4. A dedicated lighting transformer can be installed When the lighting load is large or the shared transformer for power, lighting seriously affects the lighting quality and bulb life.

Choose a transformer according to the usage environment:

1. Under normal medium conditions, oil-immersed or dry-type transformers can be selected according to the situation, such as independent or attached substations in industrial and mining enterprises, agriculture, independent substations in residential areas, etc. Available transformers include S8, S9, S10, SC (B) 9, SC (B) 10, etc.

2. In multi-story or high-rise main buildings, non-combustible or flame-retardant transformers should be used, such as SC (B) 9, SC (B) 10, SCZ (B) 9, SCZ (B) 10, etc.

3. In places where dust or corrosive gas seriously affects the safe operation of the transformer, closed or sealed transformers should be selected, such as BS 9, S9-, S10-, SH12-M, etc.

4. High and low-power distribution devices can be installed in the same room without flammable oil and non-oil-immersed distribution transformers. At this time, the transformer should have an IP2X protective shell for safety.