The sewage pump is widely applicable to urban environmental protection, building and other aspects. If the sewage pump can not start normally, it is estimated that anyone will plug in. What causes it will cause the sewage pump to fail to start normally? There are nine reasons for the Huaian dosing metering pump manufacturer.

First, the power supply voltage of the sewage pump is too low. Because the power supply voltage is too low to cause the sewage pump to start, the sewage pump usually requires the power supply voltage of 380V, and the power supply voltage should be adjusted to more than 342V. In case of emergency for disaster and drainage, the sewage pump must be used. When the supply voltage is lower than 342V, temporary emergency measures can be taken: appropriately adjust the setting current of the drain pump protection switch, so that the protection switch will not be tripped due to overload frequently. But when used, we should control the current of the stator winding of the sewage pump no more than 11 times of the rated current, and control the operation time, so that the sewage pump will not be overloaded and overloaded for a long time, which will cause the temperature rise of the stator winding to be too high and overheat damage.

Two, sewage pump sewage pump or power off phase power use, such as cable faults, fuses, control protection switch contact and protection device, resulting in submersible pump stops, should carefully check the fuse, the power supply line control protection switch and protection device is faulty, check whether the power off or power, or because of the fuse, control protection switch and protection device or poor contact caused by phase failure or power failure. Repair or disconnect due to a fuse, a control switch and a protective device; if the power supply is interrupted, the power supply should be restored.

Three, the impeller of the sewage pump is stuck. Because the sewage pump impeller is blocked by water and grass and sundries and so on, when the submersible pump stops, the pump should be removed, the water and grass should be cleared, and the sundries and so on, so that the submersible pump can run normally.

Four, the sewage pump cable is too small, too long, the voltage drop caused by excessive sewage pump power supply voltage is too low, the motor can not start. The way to deal with the problem is to increase the cable section properly when the drain pump is far away from the power supply, the cable is longer and the voltage drop is too large: if the length of the cable is doubled, the cable section should also be doubled.

Five, the contact between the plug and switch of the sewage pump, the contact between the plug and switch of the bad sewage pump and so on, and the bad contact can cause the submersible pump to start repair or replace the bad contact connector.

Six. The cause of the action of the heat protector should be checked first when the action of the heat protector is stopped in the use of the heat protector pump in the discharge pump. Such as sewage pump failure, should immediately find and troubleshooting; such as motor overload is caused, should find out the reasons of overload and eliminate them: such as whether it is caused by the low supply voltage of the motor current is too large; or because the impeller is debris around, turning poor; whether the bearing is damaged, causing the stator of the motor and the rotor rub and the ambient temperature is too high. The operation of the heat protector indicates that the temperature of the submersible pump has exceeded the rated temperature, and the temperature of the stator winding should be reduced. After the automatic reset of the heat protector, the submersible pump can run again.

Seven. The damage elimination method of the heat protector of the sewage pump is the first to check the cause of the damage of the heat protector. If the thermal protector of the damage is caused by the fault of the sewage pump, should immediately find and troubleshoot sewage pump; if the thermal protector is damaged due to thermal protector quality caused by or due to thermal protector used for a long time cause, should the thermal protector replace the same model, the same specifications.

Eight, sewage pump sewage pump stator winding damage caused by stator winding damage, stops, should first check the reason, the motor stator winding damage diving troubleshooting, prevent further damage to the submersible electric motor stator winding; then the stator winding of submersible motor for disassembling repair, in accordance with the requirements to replace the stator winding damage.

Nine, single-phase submersible motor centrifugal switch is bad or damaged removal method is to first check whether the fault causes of the centrifugal switch is damaged and the sewage pump sewage pump, if a fault exists, should immediately find and troubleshoot sewage pump, and then repair or replace the centrifugal switch.