In the sewage treatment, the use of sewage submersible pumps is very frequent, pay attention to the use of submersible sewage pump maintenance and pay attention to some common maintenance, can very well extend the life of submersible sewage pump. So how to maintain the pump? Xiaobian now tell you to use the process to pay attention to things. Sewage submersible pump 1. To determine the correct direction of rotation of the motor should be to find out the direction of rotation of the motor, and now there are many types of submersible sewage pump forward and rotary when the water can be, but when the rotation is small, large current, Long will damage the motor winding. 2. To prevent the power supply voltage abnormal boot Because the low-voltage power supply line is longer, the end of the line voltage is too low is common. When the phase voltage is lower than 198 volts and the line voltage is lower than 342 volts, the submersible sewage pump motor speed is reduced. When it reaches 70% of the extra speed, the centrifugal switch will be closed and the starting winding will be energized for a long time to generate heat and even burn Bad winding and capacitor. Conversely, overvoltage causes the motor to overheat and burn the windings. Therefore, the submersible sewage pump in operation, the operator is necessary to investigate the value of the power supply at any time, if less than 10% of the additional voltage below 10% above the extra voltage, the motor should stop working to find the cause and troubleshooting. 3. Cable device and submersible sewage pump insulation resistance requirements Device submersible sewage pump, the cable to be overhead, the power cord not too long. Do not submersible sewage pump water or put the force to prevent the power cord to crack. Submersible pump operation do not sink into the mud, otherwise it will cause poor motor cooling and motor windings burn. Installation, the motor insulation resistance should not be less than 0.5 megohms. 4. Leakage maintenance device leakage maintenance device, also known as lifeguard, its effect from the 'lifeguard' these three words can understand. Because the submersible sewage pump operation in the water, a simple electrical leakage caused by the formation of electricity loss and even lead to accidents. If equipped with leakage protector, as long as the submersible sewage pump leakage current value exceeds the leakage current protection device (usually not more than 30 milliamps), the leakage protection will intercept submersible pump power, to ensure safety, together to prevent leakage, damage Electricity. 5. To prevent frequent switching Do not switch the submersible pump frequently, this is because the pump will stop when the reflux occurs, if immediately turn on, the motor load will start, causing the starting current is too large and burn the winding. Because the current is very large, frequent start-up will also burn the submersible sewage pump motor windings. 6. Do not submersible sewage pump long time overload operation To prevent the submersible pump overload work for a long time, do not pumping large amounts of water and check the current value is not on the nameplate rules on the value, if it is found that the current is too large , Should stop to see. In addition, pump dehydration operation should not be too long to prevent the motor overheating and burned. 7. Pay attention to the normal maintenance Often to always check the motor, found under the crack, rubber seal ring damage or failure, etc., should be promptly replaced or modified to prevent water from entering the submersible pump. Further Reading: pump valve pipe fittings Exhibition Water Expo Xiamen exhibition of marine equipment Internet + Forum Yiwu Fair 2016 exhibition mold top ten brands of the Internet information industry (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / WeChat: 2355962924) http://beng.liuti.cn/ (Service Hotline: 400-6030-811)