The small submersible pump is compact and light, which plays an important role in the field of irrigation and domestic water. In order to avoid accidents in the process of use, extend the service life, play its excellent performance, the use should pay attention to the following points:
To install leakage protection device. Submersible pump works in the water, easy to leakage caused by power loss or even cause an electric shock accident. If there is a leakage protector, as long as the submersible pump leakage exceeds a certain value (generally no more than 30 MA), leakage protector will cut off the power of the submersible pump, to avoid leakage of electricity waste, to ensure safety.
When the installation of submersible pumps, cables to overhead power line, not too long. Submersible pump or put forward when not to make the cable force, so as not to cause the power cord rupture. When the submersible pump works do not sink into the mud, otherwise it will lead to poor motor cooling motor windings burned. When installed, the insulation resistance of the motor shall not be less than 500 billion.
Try to avoid the power supply voltage when abnormal boot. The power supply voltage and rated voltage is 10%, the voltage is too high will cause motor overheating and burn winding, low voltage motor speed decreased, such as less than 70% of the rated speed, the centrifugal start switch closed, causing the startup winding electricity and heat and even burn winding and capacitor.
Do not switch motor frequently. This is because the pump will stop to have a return, if an immediate start, will start the motor load, resulting in excessive current and start winding burn.
Do not let the pump long-term overload, do not draw large sediment water, dewatering pump run time should not be too long, to avoid overheating and burning motor. Units in operation, the numerical operator must always observe the operating voltage and current is specified on the nameplate, the non-compliance should be the motor to stop running, find out the reasons and troubleshooting.
Motor rotation direction is correct. Should be clear about the direction of rotation of the motor, and now there are many types of submersible pumps are turning and reversing can be water, but the reverse when the water volume is small, the current is large, the inversion of a long time will damage the motor windings. Usually to check the motor, such as the discovery of cracks under the cover, rubber seal ring damage or failure, should be replaced or repaired in time to avoid the water into the submersible pump.