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村里一家单相水泵不能抽水,找我前去修理。 水泵用插头连接,插头插上时,水泵一点声音也没有。用万用表量电压正常,考虑是水泵本身问题。再用万用表量绕组正常,绝缘也很好,故原因不在水泵。接着又把插座拆开,用表量电压220V正常,再插上水泵用表量电压,没有指示,故此认为线路中故障。切断电源,顺着插座线中寻找,此线路是从地下室照明线路上引出的电源,潮湿的墙壁上,接头处又没有包好,发现
A single-phase pump in the village can not pump water, find me to go to repair. Pump connected with the plug, the plug is plugged in, the pump did not sound a little. With a normal multimeter voltage, consider the pump itself. Multimeter winding and then normal, insulation is also very good, so the reason is not in the pump. Then again the outlet open, the normal amount of table voltage 220V, then plug the meter with the amount of voltage, there is no indication, so that the line fault. Cut off the power, looking down along the outlet line, this line is from the basement lighting circuit leads to the power supply, damp wall, the connector is not wrapped, found