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兖州矿业(集团)公司济宁二号煤矿对井下掘进工作面局部通风机采用双风机、双电源供电方式不能自动切换主局部通风机进行研究,找到了解决方法。①备用风机电源接在掘进工作面馈电开关负荷侧。这种接线方式下,备用通风机电源停电次数高。其原因是:掘进工作面环境温度高、湿度大,易使电源电缆或机电设备绝缘值降低,会发生漏电、过负荷等故障,引起总馈电开关跳闸,造成局部通风机备
Yanzhou Mining (Group) Company Jining No. 2 coal mine face underground working face ventilation fan using dual fans, dual power supply mode can not automatically switch the main local fan to find the solution. ① standby fan power connected to the heading face of the feed switch load side. This connection mode, the standby fan power supply high number of blackouts. The reason is: tunneling face high ambient temperature, humidity, easy to make the power cable or mechanical and electrical equipment insulation value decreases, leakage, overload and other failures occur, causing the total feed switch tripping, resulting in local ventilation equipment