1) When there are a large number of primary or secondary loads, it is advisable to install two or more transformers. When any one transformer is disconnected, the capacity of the remaining transformers should be sufficient to meet the power needs of the primary and secondary loads. Primary and secondary loads should be concentrated as much as possible and not too dispersed.
2) When the seasonal load capacity is large, it is advisable to install a dedicated transformer. Examples include air conditioning refrigeration loads and heating electric heating loads in large civil buildings.
3) When the concentrated load is large, it is advisable to install a dedicated transformer. Examples include large heating equipment, large X-ray machines, and electric arc furnaces.
4) When the lighting load is large or when sharing a transformer for power and lighting seriously affects lighting quality and bulb life, a dedicated lighting transformer can be installed. Generally, power and lighting share a transformer.
