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How To Protect The Submersible Pump?

Released on Sep. 11, 2018

Submersible pumps often cause motor windings to burn out due to water shortages in the pool. In response to this situation, today Horizontal Multistage Water Pump Supplier have sorted out several protection measures for submersible pumps: water shortage protection, motor leakage protection, oil chamber leakage protection, insulation resistance protection, winding overheat protection, and bearing overheat protection.

1. It is forbidden to turn on when the power supply voltage is abnormal.

Since the low-voltage power supply line is relatively long, the terminal voltage of the line is too low, which is a common occurrence. When the phase voltage is lower than 198 volts and the line voltage is lower than 342 volts, the motor speed of the submersible pump drops. When the rated speed is less than 70%, the centrifugal switch will be closed, causing the starting winding to be energized for a long time and even burned out. Windings and capacitors. Conversely, a voltage that is too high causes the motor to overheat and burn out the winding. Therefore, in the operation of the submersible pump, the operator must observe the power supply voltage value at any time. If it is lower than the rated voltage by 10% or less and higher than the rated voltage by more than 10%, the motor should be stopped, the cause should be found and the fault should be eliminated.

2, cable installation and insulation resistance requirements of submersible pumps

When installing the Submersible Water Pump, the cable should be overhead and the power cord should not be too long. Do not force the cable when the submersible pump is launched or raised, so as not to cause the power cord to break. Do not sink into the mud when the submersible pump is working, otherwise it will cause poor heat dissipation of the motor and burn the motor windings. When installed, the insulation resistance of the motor should not be less than 0.5 megohms.

3, avoid frequent switching

Do not switch the submersible pump frequently. This is because the recirculation occurs when the electric pump is stopped. If it is turned on immediately, the motor load will start, causing the starting current to be too high and the winding to be burned out. Due to the large current at start-up, frequent start-up will also burn the submersible pump motor windings.

4, prohibit the long-term overload work of the submersible pump

In order to avoid long-term overload operation of the submersible pump, do not pump water with a large amount of sand and observe whether the current value is on the nameplate. If the current is too large, stop the machine. In addition, the dehydration operation time of the electric pump should not be too long, so as to prevent the motor from overheating and burning.

Submersible Water Pump

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