Fountain pump use precautions

Fountain pump is actually a well submersible pump, is designed for agricultural irrigation and drainage, sprinkler irrigation, industrial and civil construction of the drainage system developed for ponds, fish ponds, water towers, deep wells and high water delivery.
When using the fountain submersible pump, there are a few points that require special attention:
1, equipment grounding:
In order to ensure the safety of the fountain when used, the state of the mandatory requirements of the submersible pump is to take protective grounding, or once the pump shell leakage, water pump near the water and the reservoir surface will be charged, seriously endanger the safety of humans and animals , Will also cause the waste of electricity.
If the fountain pump metal shell and meet the national standard grounding (grounding resistance is not greater than 4Ω) ground connection, leakage, the current through the pump shell, ground, grounding, ground, transformer working ground wire and power to form a closed Circuit, once the leakage current is too large, is to make the pump protection device work - fuse blow or air switch trip, automatically disconnect the fountain pump power.
2, install the leakage protector:
Once the leakage crisis occurs, as long as the leakage value exceeds the operating current value of the leakage protector, usually not more than 30mA, the leakage protector will work, disconnect the switch, so that the fountain to stop running.
3, the power supply voltage is abnormal when the boot:
As a submersible pump, the voltage is too high, too low will make the pump temperature rise, shorten the life of the pump, or even burn, and now in many places there is a long-term low-voltage power supply line or line terminal voltage is too high, the terminal voltage is too low The problem. Therefore, when the fountain is running, the operator should always pay attention to the power supply voltage value, when the power supply voltage is higher than the rated voltage of 10% or less than the rated voltage of 10%, and the current exceeds the rated current of 20%, should immediately stop, to avoid abnormal voltage Boot.
4, the motor in the opposite direction of rotation:
Although some fountain submersible pumps can reverse the double water, but because of the reverse flow of small current, so reverse the time is too long will damage the motor.
5, to avoid long-term overload work