大型变压器冷却控制箱双回路电源的改进

Improvement on Double-Circuit Supply of High Power Transformers' Cooler Control Cabinets

大型变压器冷却控制箱具有双回路电源自动投入功能，以保证变压器安全运行，而 因控制箱所配置的电器件不当，可能存在双回路电源不能投入的故障隐患。分析隐患所带来 的不良后果并提出改进方法，同时介绍了广州电力设备厂所设计的相关线路。

High power transformers' cooler control cabinets have a function that makes double-cricuit supply come into use automatically to ensure the safety of working transformers. It is possible that potential failure makes double-circuit supply fail to work, because the control cabinets are equipped with unsuitable electrical embodiments. In this paper, the bad effect of the potential failure is analyzed and the improving method is put forward, the relative circuit designed by Guangzhou Electric Power Equipment Plant is introduced as well.