Deep well submersible pump in the use of frequency converter precautions:

As the load of the submersible pump is relatively heavy compared to ordinary pumps, the rated current of the supporting motor is relatively large. Therefore, the choice of frequency converter should be based on the rated current of the motor compared to the rated current of the frequency converter to choose, not just power matching.

Pay attention to the installation and use of the environment, for installation in the pumping station and other relatively humid site to do a good job of inverter protection. Such as, strengthen the PCB circuit board insulation protection paint processing, screw sheet metal parts of the protective treatment, and placed in the control box to use.

Submersible pumps are generally about 100 meters deep, the distance between the inverter and the pump is far. Therefore, in the use of the process to consider thickening the cable diameter to reduce line losses, optional output reactor to reduce line leakage current, appropriate increase in frequency converter selection to make up for the power attenuation. Especially non-clear water pump containing impurities should be increased selection, not in the water no-load current is very large.

Regular inspection and maintenance of equipment, for the pumping unit to check the appearance of aging, sealing without leakage, insulation measurements, etc.. Frequency converter should also be regularly viewed, cleaned up to ensure that can work well. For the requirements shall not have intermittent use of the occasion to do a good job of backup emergency control circuit, in order to prevent the frequency converter condition caused by the shutdown.

Good grounding is the basis of stable and reliable operation of the inverter, in the field does not have a reliable grounding can be considered inverter not grounded. It is strictly prohibited to zero ground public, the zero line as the ground to the ground terminal of the inverter. It is also not allowed to connect the ground of the motor and the ground of the inverter together.