Causes and solutions of submersible sewage pump without water

First, the submersible sewage pump power supply voltage is too low

Submersible sewage pump power supply voltage is too low because the power supply voltage is too low, resulting in the submersible sewage pump can not start, the submersible sewage pump is usually required to 380V power supply voltage, should be adjusted to more than 342V. When the submersible sewage pump is used in the emergency situation of flood prevention and drainage, and the power supply voltage is lower than 342V.

Solution: Properly increase the setting current of the protection switch of the submersible sewage pump, so that the protection switch will not trip frequently due to overload during the use of the submersible sewage pump. However, when used, the current of the stator winding of the submersible sewage pump should be controlled not more than 11 times of its rated current, and the use time should be controlled, so that the submersible sewage pump will not be damaged by overheating due to excessive temperature rise of the stator winding.

Second, the submersible sewage pump power supply is out of phase or power

During the use of submersible sewage pump, such as cable core breakage, fuse breakage, poor contact of control and protection switch, and action of protection device, the submersible pump stops running

Solution: Carefully check whether the fuse, control protection switch and protection device in the power supply line are faulty, check whether the power is out of phase or power, or because of the fuse, control protection switch and protection device operation or contact is bad. Repair power outages or disconnections caused by fuses, control protection switches and protection devices; If the power supply is interrupted, restore the power supply.

Three, diving sewage pump impeller stuck

The submersible sewage pump impeller is stuck because the sewage pump impeller is stuck by water grass, debris, etc. The submersible pump stops. Solution: Should disassemble the pump, remove water grass, debris, etc., so that the submersible pump can operate normally.

4. The submersible sewage pump cable is too thin and too long, resulting in too low voltage

The cable of submersible sewage pump is too thin, too long, and the voltage drop is too large, resulting in the supply voltage of sewage pump is too low, and the motor cannot start. Solution: When the submersible sewage pump is used far from the power supply, the cable is long, and the voltage drop is too large, the cable section should be appropriately thickened: if the cable length is increased, the cable section should also be increased accordingly.

Five, the use of poor contact connector caused by submersible pump can not start

Submersible sewage pump plug, switch and other connectors poor contact of submersible sewage pump plug, switch and other connectors poor contact causes the submersible pump can not start. Solution: Repair or replace the connector with poor contact.