润色厂用变压器的容量必须满足厂用电负荷从电源获得足够的功率。因此对厂用工作变压器的容量应按厂用电高压计算负荷的110与厂用电低压计算负荷之和进行选择；而厂用低压工作变压器的容量应留有10左右的裕度。厂用高压备用启动变压器应与最大一台厂用高压工作变压器的容量相同；厂用低压备用变压器的容量应与最大一台厂用低压工作变压器容量相同

The capacity of the transformer used in the factory must meet the power demand of the factory's electrical load from the power source. Therefore, the capacity of the working transformer for the factory should be selected based on the sum of 110% of the load calculated by the factory's high-voltage and low-voltage electricity, and the capacity of the low-voltage working transformer for the factory should have a margin of about 10%. The capacity of the high-voltage standby/startup transformer for the factory should be the same as the capacity of the largest high-voltage working transformer, and the capacity of the low-voltage standby transformer for the factory should be the same as the capacity of the largest low-voltage working transformer