Correct Use Of Electric Sewage Pump

Electric Sewage Pump has been paid more and more attention by people, and their scope of use has become wider and wider. From the original pure water transportation to the present, it can transport various construction site drainage, industrial wastewater, domestic sewage, liquid feed, etc. Wait. It plays a very important role in the industry, municipal engineering, hospitals, restaurants, construction, water conservancy construction, and other industries. Let's take a look at how to use it correctly:

1. It is forbidden to start the machine with an abnormal power supply voltage
Because the low-voltage power supply line is relatively long, it is common for the voltage at the end of the line to be too low. When the phase voltage is lower than 198 volts and the line voltage is lower than 342 volts, the motor speed of the sewage pump will drop. When it does not reach 70% of the rated speed, the start centrifugal switch will be closed, causing the start winding to be energized for a long time and heat up or even burn out. windings and capacitors. On the contrary, the high voltage causes the motor to overheat and burn out the windings. Therefore, during the operation of the sewage pump, the operator must observe the power supply voltage value at any time. If it is lower than 10% of the rated voltage and higher than 10% of the rated voltage, the motor should be stopped to find out the cause and eliminate the fault.

2. Confirm the correct rotation direction of the motor
The rotation direction of the motor should be clarified. Now there are many types of sewage pumps that can discharge water during forwarding rotation and reverse rotation, but the water output is small and the current is large during reverse rotation. The long reverse rotation time will damage the motor windings.

3. Installation of leakage protector
The leakage protector is also called a life saver, and its function can be understood from the three words "life saver". Because the sewage pump works underwater, it is easy to leak electricity, resulting in power loss and even electric shock accidents. If a leakage protector is installed, as long as the leakage value of the sewage pump exceeds the operating current value of the leakage protector, the leakage protector will cut off the power supply of the sewage pump to ensure safety and avoid leakage and waste of electricity.

4. Cable installation and insulation resistance requirements of submersible pumps
When installing the sewage pump, the cable should be overhead, and the power cable should not be too long. Do not apply force to the cable when the sewage pump is launched or lifted, so as not to cause the power cord to break. Do not sink into the mud when the sewage pump is working, otherwise, it will cause poor heat dissipation of the motor and burn out the motor windings. During installation, the insulation resistance of the motor should not be lower than 0.5 megohms.

5. Avoid frequent switching
Do not switch the sewage pump on and off frequently, because the backflow will occur when the electric pump stops. If it is turned on immediately, the motor load will start, resulting in excessive starting current and burning out the windings. Due to the large current at startup, the frequent startup will also burn out the motor windings of the sewage pump.

6. Do not allow the sewage pump to work overload for a long time
In order to avoid the long-term overloading of the sewage pump, do not pump water with high sand content and observe whether the current value is in the value specified on the nameplate at any time. If it is found that the current is too large, it should be stopped for inspection. In addition, the dehydration time of the water pump should not be too long, so as not to overheat the motor and burn it.

7. Pay attention to daily maintenance
The motor should be checked frequently. If the lower cover is found to be cracked, the rubber sealing ring is damaged or invalid, etc., it should be replaced or repaired in time to prevent water from infiltrating the sewage pump. In the daily operation of the submersible sewage pump, as long as we can operate the equipment in the correct way and pay attention to the maintenance of the equipment in the later period, the problem of prolonging the service life of the submersible sewage pump will be easily solved.