故障现象保护开头经常跳闸，熔丝烧断，或电泵内的热保护器周期动作，致使电泵不出水，或者一会儿出水一会儿不出水，十几分钟一次，周而复始。电泵工作电流远大于铭牌上规定的电流值。原因分析（1）三相熔丝烧断、起动开头或二相闸开头接触不良，各接线头有松脱，线路有故障， Fault protection at the beginning of the beginning of the trip, the fuse blown, or pump thermal cyclers within the cycle of action, resulting in pump no water, or while out of the water for a while without water, ten minutes, again and again. Electric pump working current is much larger than the nameplate on the current value. Reason analysis (1) three-phase fuse blown at the beginning of the start or two-phase brake at the beginning of poor contact, the terminals have loose, the line is faulty,