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Use the following seven points when using a small submersible pump
Edit:Lianyungang Mi Lu Luo Pump Industry Co., Ltd   UpDate:2016-07-13

1, the installation of leakage protector leakage protection device is also called the security device, its role from the "security device" these three words can understand. Because the submersible pump works underwater, it is easy to leak electricity caused by electric energy loss or even lead to electric shock. If the leakage protector is installed, as long as the submersible pump leakage value exceeds the operating current value of the leakage protector (generally not more than 30 mA), the leakage protection device will cut off the submersible pump power, to avoid leakage of electricity, to ensure safety.
2, the power supply voltage abnormal Mo open rural areas due to low-voltage power supply lines are relatively long, the line is too low voltage is often the thing. When the phase voltage is lower than 198 volts, the line voltage is lower than 342 volts, the submersible pump motor speed decreases, when the rated speed of 70%, start the centrifugal switch will be closed, resulting in a long time to start the winding power and even burn Windings and capacitors. Conversely, the voltage is too high to cause the motor to overheat and burn the windings. Therefore, the submersible pump in the operation, the operator must observe the power supply voltage at any time, if less than 10% of the rated voltage, higher than the rated voltage of 10% or more, the motor should be stopped to find out the cause and troubleshooting.
3, to avoid frequent switching Do not frequently switch the submersible pump, this is because the pump will stop when the return flow, if the boot immediately, will start the motor load, resulting in starting the current is too large and burn the winding. Due to the start of a large current, frequent start will burn the submersible pump motor windings.
4, let the submersible pump long-term overload work to avoid submersible pump long-term overload work, do not smoke a large amount of water and observe the current value at any time on the nameplate on the value, if found that the current is too large, an examination. In addition, the pump dehydration operation time should not be too long, so as not to overheat the motor and burned.
5, the direction of rotation of the motor should be correct to find out the direction of rotation of the motor, there are many types of submersible pump forward and reverse can be when the water, but reverse the amount of water, the current is large, the reversal of a long time Will damage the motor windings.
6, cable installation and submersible pump insulation resistance requirements When installing the submersible pump, the cable to overhead, the power cord should not be too long. Submersible pump water or put forward when the cable force, so as not to cause the power line break. Submersible pump work do not sink into the mud, otherwise it will lead to poor motor cooling and burn the motor winding. When installed, the insulation resistance of the motor should not be less than 0.5 megohms.
7, diligent to see the problem found in time to repair the usual check the motor, such as found under the cover with cracks, rubber seal ring damage or failure, etc., should be replaced or repair, to avoid water into the submersible pump [China Pump Trading Network Editor]

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