Safety protection method of FY Immersible Pump products



FY Immersible Pump products are important equipment for deep well water pumping. When in use, the whole unit dives into the water to work, extracting groundwater to the surface, which is used for domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship load regulation, and can also be used for fountain landscapes. Hot water submersible pumps are used for hot spring bathing, and can also be used to extract groundwater from deep wells, and can also be used in water extraction projects such as rivers, reservoirs, and canals. It is mainly used for farmland irrigation and water for people and animals in high mountain areas. It can also be used for central air-conditioning cooling, heat pump units, cold pump units, cities, factories, railways, mines, and construction site drainage. The general flow can reach 5~650m3/h, and the lift can reach 10-550 meters. Submersible pumps often burn out motor windings due to lack of water in the pool. In response to this situation, we have sorted out several protection measures for FY Immersible Pump products today: water shortage protection, motor water leakage protection, oil room water leakage protection, insulation resistance protection, winding overheating protection, bearing overheating protection, etc.

FY Immersible Pump

Safety protection method of FY Immersible Pump products

1. It is forbidden to start the machine with abnormal power supply voltage
Because the low-voltage power supply line is relatively long, it is common for the voltage at the end of the line to be too low. When the phase voltage is lower than 198 volts and the line voltage is lower than 342 volts, the motor speed of FY Immersible Pump products will drop. When it does not reach 70% of the rated speed, the start centrifugal switch will be closed, which will cause the start winding to be energized for a long time and even heat up. Burn out windings and capacitors. On the contrary, the high voltage causes the motor to overheat and burn out the windings. Therefore, during the operation of the submersible pump, the operator must observe the power supply voltage value at any time. If it is less than 10% of the rated voltage and more than 10% of the rated voltage, the motor should be stopped to find out the cause and eliminate the fault.

2. Confirm the correct rotation direction of the motor
The rotation direction of the motor should be clarified. Now there are many types of high-lift FY Immersible Pump products that can discharge water during forward rotation and reverse rotation, but the water output is small and the current is large during reverse rotation. The long reverse rotation time will damage the motor windings. .

3. Cable installation and insulation resistance requirements of submersible pumps
When installing FY Immersible Pump products, the cables should be overhead and the power cables should not be too long. Do not apply force to the cable when the submersible pump is launched or lifted, so as not to cause the power cord to break. Do not sink into the mud when the submersible pump is working, otherwise it will cause poor heat dissipation of the motor and burn the motor windings. During installation, the insulation resistance of the motor should not be lower than 0.5 megohms.

4. Avoid frequent switching
Do not switch FY Immersible Pump products on and off frequently. This is because backflow will occur when the pump stops. If it is turned on immediately, the motor load will start, resulting in excessive starting current and burning out the windings. Due to the large current at startup, frequent startup will also burn out the submersible pump motor windings.