铁合金炉或电弧炉的冶炼变压器开关的操作电源,常常来自另一台动力变压器,一旦动力变压器因故停电,高压供电系统不能迅速断电,易造成事故。如我厂铁合金炉的冶炼电源过去是由10KV供电的,其高压断路器的电动合、分闸控制电源,则是由另一台厂动力变压器供给。当动力变压器因故障 Ferroalloy furnace or electric arc furnace smelting transformer switching power supply, often from another power transformer, once the power transformer for some reason power failure, high-voltage power supply system can not quickly power outage, easy to cause an accident. Such as my factory ferroalloy furnace smelting power supply in the past by the 10KV power supply, the high-voltage circuit breakers of electric, sub-gate control power supply, it is from another plant power transformer supply. When the power transformer due to failure