1, before starting the submersible sewage pump, need to install a good special water leakage leakage protection switch or specifications in line with the overload protection switch to facilitate the use of submersible sewage pump in the event of a failure, can be reliable and effective protection and does not cause damage to the submersible motor stator winding, and even the entire motor.
2, submersible pumps need to adopt maintenance grounding to ensure personal safety when using. If there is no maintenance grounding, once the shell leakage, it will constitute a submersible pump outlet at the water and pumping water charged, endangering the safety of people and animals, while wasting a lot of power. If the submersible pump metal casing and grounding body that meets national standards (grounding resistance is not greater than 4Ω) grounding connection, when the submersible pump casing leakage, the current through the submersible pump metal casing, maintenance grounding line, grounding body, earth, transformer grounding line and the power supply constitutes a closed loop, when the leakage current is too large, especially when the front of the touching shells, the submersible pump will be able to make the action of the maintenance device, blocking leakage of submersible pumps The power supply of the submersible pump.

3, the power supply voltage and the rated voltage can not be 10% difference, the voltage is too high will cause the motor to overheat and burn the windings, the voltage is too low will make the motor speed drop, if it is less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in the start of the windings for a long time energized and heated or even burned the windings and capacitors. Do not switch on and off the motor frequently, because the electric pump will produce a return current when it stops, and if it is turned on immediately, it will cause the motor load to start, resulting in excessive starting current and burn the winding.

4, in order to prevent the submersible pump long time overload operation, don't use the low head pump for high head operation, don't pump the water with large sand content (heavy mud), and always investigate whether the current value is within the rules. If the current is found to be too large, it should be stopped to check. In addition, the submersible pump to water as a cooling source, therefore, the submersible pump dehydration should not run too long.

5, submersible pumps in the application if sunk in the mud, will lead to poor heat dissipation and burn the motor winding. Therefore, the submersible pump must not be used in the silt environment. In order to prevent the submersible pump from sinking into the mud, need to remove the submersible pump before the water in the operating environment in the silt, in order to prevent the waste blocking the inlet gate, resulting in the motor heating, water out of the poor.

6, in the use of submersible sewage pump, should check whether the motor inside or seal oil chamber is full of oil, such as not in accordance with the provisions of the full, should be supplemented to the required oil level.