Why do deep well pumps stop running immediately?

1) The current exceeds the rated value at rated voltage;

2) Under the rated head, the flow rate decreases greatly compared with the normal condition;

3) The insulation resistance is less than 0.5 megohm;

4) When the dynamic water level drops to the pump suction inlet;

5) When the electrical equipment and circuit are not in accordance with the regulations;

6) When the electric pump has sudden sound or large vibration;

7) When the protection switch frequency trips.