Small submersible pump compact and lightweight, farmland irrigation and farm life water can not be separated. In order to avoid accident during use, extend the service life, to play its excellent performance, the use should pay attention to the following seven points:

1, install leakage protector

Leakage protection, also known as lifeguard, its role from the "lifebinder" these three words can be understood. Because the submersible pump works underwater, it is easy to cause electric leakage due to leakage and even cause electric shock accident. If leakage protector is installed, the leakage protector will cut off the power of the submersible pump as long as the leakage value of the submersible pump exceeds the operating current value of the earth leakage protector (usually not more than 30 milliamps), so as to avoid electric leakage and waste of electric energy to ensure safety.

2, the power voltage is abnormal Mo boot

Rural areas due to the low voltage power supply line is longer, the end of the line voltage is too low. When the phase voltage is lower than 198 volts, the line voltage is lower than 342 volts, the submersible pump motor speed drops, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in a long time winding start energized or even burn out Windings and capacitors. In contrast, overvoltages cause the motor to overheat and burn the windings. Therefore, the submersible pump operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage below 10% above the rated voltage, the motor should be stopped to find out the cause and troubleshooting.

3, to avoid frequent switching

Do not switch submersible pumps frequently, this is because the pump will stop when the flow back, if immediately start, the motor load will start, causing the starting current is too large and burn the winding. As the start-up current, frequent start-up will also burn the submersible pump motor windings.

4, let submersible pump long-term overload work

To avoid long-term overload of submersible pump work, do not pumping large amounts of water and observe the current value is on the nameplate if the value specified, if the current is too large, should be shut down for inspection. In addition, the pump running time dehydration should not be too long, so as not to overheat the motor and burned.

5, the direction of motor rotation to be correct

There are many types of submersible pump forward and reverse when the water can be, but the reverse is small, 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 submersible pump, the cable should be overhead, the power cord should not be too long. Submersible pump into the water or made when not to force the cable, so as not to cause the power cord rupture. Submersible pumps do not sink into the mud during work, otherwise it will lead to poor motor cooling and burn motor windings. When installed, the insulation resistance of the motor should not be less than 0.5 megohms.

7, Qinqin see found timely repair problems

Normally, always check the motor. If there is a crack in the lower cover or damage or failure of the rubber seal ring, it should be promptly replaced or repaired to prevent water from entering the submersible pump.

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