1. The installation of leakage protection device
Leakage protection is also called the life of the device, it's role from the "life" of the three words can be understood. Because submersible pump works under water, easy to leakage caused by power loss or even lead to electric shock accident. If equipped with leakage protector, as long as the submersible pump leakage values over the action current of leakage protector value (generally not more than 30 MA), earth leakage protection device will cut off the submersible pump power to prevent waste of electricity leakage, to ensure safety.
2. Abnormal power supply voltage
Low voltage power supply lines in rural areas is relatively long, the end of the line is too low voltage. When the phase voltage below 198 volts, line voltage lower than 342 volts, submersible pump motor speed to drop, when up to 70% less than the rated speed, launch a centrifugal switch closed, causing start winding long-term electricity and heat and even burn winding and capacitor. On the contrary, caused by high voltage motor overheating and burn winding. Therefore, submersible pump in operation operator will be necessary at any time to observe the value of supply voltage, if less than 10% of rated voltage below, higher than the 10% of rated voltage above, should the motor stop working, find out the reasons and troubleshooting.
3. To prevent frequent switch
Do not frequently switch submersible pump, this is because the pump switch to stop the return will produce, if an immediate start, will make the motor start load, leading to the start current and winding burn. Because the start when the current large, frequent start will burn submersible pump motor windings.
4. Do not let the long-term overload of work submersible pump
In order to prevent the submersible pump long-term overload of work, do not draw large sediment water and always observe the current whether in the nameplate on the provisions of the numerical value, if it is found that the current is too large, should stop check. In addition, the electric pump running time should not be too long, so as to avoid overheating and burning motor.
5. The rotation direction of the motor to be correct
Should make clear the direction of rotation of the motor, and now there are many types of submersible pumps are turning and turning all available water, but when the water is small, the current large, its turn a long time will damage the motor windings.
6. Insulation resistance , submersible pump cable installation and
When the installation of submersible pumps, cables to overhead power line, not too long. Submersible pump water or put forward not to make the cable force, so as not to cause power line fault. When the submersible pump works do not sink into the mud, otherwise it will lead to poor motor cooling motor windings burned. When installation, the insulation resistance of the motor should not be less than 500 billion ohm.
7. Often check and correction problem in time
Usually to often view the motor, such as the discovery of cracks under the cover, rubber seal ring damage or failure, etc., should be replaced or amended in a timely manner to prevent water penetration into the submersible pump.
