针对煤矿井下掘进工作面供电系统无选择性漏电保护的问题,根据实际需要,提出了基于附加直流电 源和零序电流方向检测的选择性漏电保护方案。在原有保护的基础上,设计了零序电压检测电路和中断信号 发生器,配合我厂生产的分支馈电开关,可有效地完成掘进工

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煤矿掘进工作面供电系统选择性漏电保护的实现_(1).pdf

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