The use of submersible pump can't do

Taking protective grounding is the requirements of national mandatory standard. Only take protective earthing, to ensure the personal safety of use. If there is no protective earthing, once the shell leakage, creates submersible water pump outlet water and pumping water charged, endanger human and animal safety, waste a lot of energy at the same time. If the submersible water pump metal shell and is in line with national standards of grounding body ( Grounding resistance is not greater than 4 Ω) Grounding connection, when the submersible pump shell leakage through the metal shell, pump protection grounding line, body, the work of the earth, transformer ground wire and power supply form a closed loop, when leakage through the large, especially when wire touch the shell, you can make the protection of the submersible pump device ( Fuse fuse or breaker tripping) , to cut off the leakage of the submersible pump power. Submersible water pump work in the water, easy leakage power loss or even cause accident getting an electric shock. If equipped with leakage protector, as long as the submersible pump leakage value than leakage protector action current value ( It is generally not more than 30 mA) Leakage protector will cut the power of the submersible pump. Voltage is too high and too low will make submersible pump temperature rise too high, shorten service life even burned submersible pump. Rural because low voltage power lines is long, end of the line voltage is too low, between high voltage is often the case. Therefore, in the process of the use of submersible pump, the operator must observe the power supply voltage, if lower than the rated voltage is less than 10%, more than 10% higher than the rated voltage, or current is greater than 20% of the rated current pump, should immediately stop, and to avoid abnormal voltage boot.
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