Seven details to extend the service life of submersible pump

The shenyang submersible pump protector on the market is many, there are leakage submersible pump protector, overheating submersible pump protector. Its protection projects include leakage protection of submersible pump oil chamber, motor leakage protection, wire box flooding protection, insulation resistance protection, winding overheating protection, bearing overheating protection, etc. But in order to extend the service life of submersible pump, avoid the occurrence of safety accidents, we still need to pay attention to the following seven details.

1, cable installation and submersible pump insulation resistance requirements

When installing submersible pump, the cable should be overhead and the power cord should not be too long. Submersible pump launching or put forward when do not make the cable stress, so as not to cause power line fracture. Submersible pump work do not sink into the mud, otherwise it will lead to motor heat dissipation poor and burn out the motor winding. The insulation resistance of the motor shall not be less than 0.5 megohm during installation.

2. Avoid frequent switching

Do not frequently switch submersible pump, this is because the electric pump stop will produce backflow, if immediately started, will make the motor load start, resulting in the starting current is too large and burn out the winding. As the starting current is very large, frequent starting will also burn out the submersible pump motor winding.

3, do not let the submersible pump long-term overload work

In order to avoid long-term overload of submersible electric pump, do not pump water with large amount of sand and observe whether the current value is in the value specified on the nameplate at any time. If the current is too large, stop the machine for inspection. In addition, the electric pump dehydration operation time should not be too long, so as not to make the motor overheating and burned.

4. Confirm the correct rotation direction of the motor

The direction of rotation of the motor should be clear, there are many types of submersible pump forward and reverse water can be discharged, but when the reverse water output is small, the current is large, the reversal time will damage the motor winding.

5. Pay attention to daily maintenance

At ordinary times to often check the motor, such as the discovery of cracks in the lower cover, rubber sealing ring damage or failure, should be replaced or repaired in time, to avoid water infiltration submersible pump.

The application of submersible pump protector and paying attention to some daily protection can better extend the service life of submersible pump.

6. Do not start the power supply with abnormal voltage

As the low voltage power supply line is long, the end voltage of the line is often too low. When the phase voltage is lower than 198 volts and the line voltage is lower than 342 volts, the motor speed of shenyang submersible pump drops. When the rated speed is less than 70%, the starting centrifugal switch will close, causing the starting power to generate heat and even destroy the winding and capacitor. On the contrary, too high voltage causes the motor to overheat and burn out the windings. Therefore, the submersible pump in the operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, more than 10% of the rated voltage, should make the motor stop running, find out the reason and troubleshooting.

7. Installation of leakage protector

Leakage protection is also called life - saver, its role from the "life - saver" these three words can be understood. Because the submersible pump works underwater, it is easy to leak electricity, cause power loss and even cause electric shock accident. If installed with a leakage protector, as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally no more than 30 ma), the leakage protector will cut off the power of the submersible pump, ensuring safety, while avoiding leakage and waste of electricity.