Under what circumstances should the deep well pump shut down

The deep well pump should immediately stop operation in one of the following situations:
First, the rated voltage when the current exceeds the rated value;
Second, the rated head, the flow lower than normal under normal circumstances;
Third, the insulation resistance of less than 0.5 megohm;
4, move the water level down to the pump suction inlet;
5, when the electrical equipment and circuit irregularities;
Sixth, the pump has a sudden sound or greater vibration;
7, protection switching frequency trip.