7 simple tips to take good care of your dive sump pump!

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　　1. Determine the correct rotation direction of the motor. It is necessary to know the rotation direction of the motor. Nowadays, there are many types of submersible sewage pumps that can discharge water either when rotating in the forward direction or in the reverse direction; however, when rotating in the reverse direction, the water flow rate is lower and the current is higher, and prolonged operation in this mode can damage the motor windings. 　　2. Prevent abnormal startup due to abnormal power supply voltage. Since the low-voltage supply lines are relatively long, it is common for the voltage at the end of these lines to be too low. When the phase voltage is below 198 volts and the line voltage is below 342 volts, the speed of the submersible sewage pump motor decreases. When it falls below 70% of the rated speed, the start centrifugal switch closes, causing the motor windings to remain energized for an extended period, which leads to overheating and even damage to the windings and capacitors. On the contrary, excessive voltage causes the motor to overheat and burn out its windings. Therefore, when operating a submersible sewage pump, the operator must constantly monitor the voltage level of the power supply; if it is 10% below or above the rated voltage, the motor should be stopped, and the cause identified in order to resolve the fault. 　　3. Insulation resistance requirements for cable installations and submersible sewage pumps: When installing submersible sewage pumps, the cables should be kept elevated, and the power cables should not be too long. When lowering or lifting the submersible sewage pump, be careful not to put stress on the cable to prevent the power cord from cracking. When operating a submersible pump, do not let it sink into the mud, as this can lead to poor heat dissipation in the motor and result in damage to its windings. During installation, the insulation resistance of the motor should not be less than 0.5 megohms. 　　4. Installation of the leakage protector The leakage protector is also known as a life-saving device, and its function can be understood from the very name \"life-saving device\". Since submersible sewage pumps operate underwater, even a minor electrical leak can lead to power loss and even electric shock accidents. If a leakage protector is installed, as long as the leakage current of the submersible sewage pump exceeds the operating current threshold of the leakage protector (which is usually no more than 30 milliamps), the leakage protector will cut off the power supply to the submersible pump, ensuring safety and preventing leakage as well as energy waste. 　　5. Prevent frequent switching – Do not turn the submersible pump on and off repeatedly, as backflow occurs when the pump stops running. If it is started immediately, it will put strain on the motor, resulting in excessive starting current that can damage the windings. Because the current is very high when starting, frequent starting can also burn out the motor windings of the submersible sewage pump. 　　6. Do not allow submersible sewage pumps to operate under overload for extended periods. To prevent submersible pumps from working under overload for long times, avoid pumping water with a high sediment content, and regularly check whether the current level is within the values specified on the nameplate. If an abnormally high current is detected, stop the pump and conduct an inspection. Otherwise, the operation time of the electric pump for dehydration should not be too long, to prevent the motor from overheating and burning out. 　　7. Pay attention to regular maintenance. Regularly inspect the motor; if cracks are found on the lower cover, or if the rubber sealing rings are damaged or no longer functional, they should be replaced or repaired promptly to prevent water from entering the submersible pump. 　　Paying attention to the use of the submersible sewage pump maintenance device and focusing on regular maintenance can significantly extend the service life of the submersible sewage pump.