1, install the leakage protector Leakage protector also called life preserver, its role from the "life preserver" these three words can be understood. Because the submersible pump works underwater, it is easy to cause electric leakage due to leakage and even cause electric shock accident. If leakage protector is installed, the leakage protector will cut off the power of the submersible pump as long as the leakage value of the submersible pump exceeds the operating current value of the earth leakage protector (usually not more than 30 milliamps), so as to avoid electric leakage and waste of electric energy to ensure safety. 2, the power supply voltage abnormalities do not turn off rural areas due to low voltage power supply line is longer, the voltage is too low at the end of the line is common. When the phase voltage is lower than 198 volts, the line voltage is lower than 342 volts, the submersible pump motor speed drops, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in a long time winding start energized or even burn out Windings and capacitors. In contrast, overvoltages cause the motor to overheat and burn the windings. Therefore, the submersible pump operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage below 10% above the rated voltage, the motor should be stopped to find out the cause and troubleshooting. 3, to avoid frequent switching Do not switch the submersible pump frequently, this is because the pump will stop when the return flow, if immediately boot, the motor load will start, leading to the starting current is too large and burn the winding. As the start-up current, frequent start-up will also burn the submersible pump motor windings. 4, do not allow submersible pump long-term overload work To avoid submersible pump long-term overload work, do not pumping large amounts of water and keep the current value is observed on the nameplate if the value is found, if the current is too large should be shut down an examination. In addition, the pump running time dehydration should not be too long, so as not to overheat the motor and burned. 5, the direction of rotation of the motor should be correct to find out the direction of rotation of the motor, there are many types of submersible pumps can forward and reverse the water, but the reversal of the small amount of water, the current is large, the reversal of a long time Damage to motor windings. 6, cable installation and submersible pump insulation resistance requirements When installing submersible pump, the cable should be overhead, the power cord should not be too long. Submersible pump into the water or made when not to force the cable, so as not to cause the power cord rupture. Submersible pumps do not sink into the mud during work, otherwise it will lead to poor motor cooling and burn motor windings. When installed, the insulation resistance of the motor should not be less than 0.5 megohms. 7. Qinqin ground see problems found in a timely manner to repair the motor often check, if found under the crack, the rubber seal ring damage or failure, etc., should be promptly replaced or repaired to avoid water infiltration submersible pumps. Submersible pumps in domestic water, mine rescue, industrial cooling, farm irrigation, sea water lifting, shipping transfer, can also be used for fountain landscape, hot water submersible pumps for hot spring bathing, but also for extracting groundwater from deep wells can also be used Rivers, reservoirs, drains and other water projects. Mainly used for farmland irrigation and water for human and livestock in high mountains, but also for central air conditioning cooling, heat pump units, cold pump units, cities, factories, railways, mines, drainage sites. General flow (10m3 ~ 650m3) per hour, head can reach 1,500 meters. Included in: Submersible pump compact and lightweight, in rural areas play an important role in production and living, should pay attention to the following points in use. First, the purchase of submersible pumps should pay attention to its model, flow and lift. If the specifications used inappropriately, will not be able to get enough water, can not play unit efficiency. In addition, we should also clarify the direction of rotation of the motor, some types of submersible pump forward and reverse can be water, but reverse the small amount of water, the current is large, the reverse will damage the motor windings. To prevent submersible pump leakage in the water when working under the accident caused by electric shock, leakage protection switch should be installed. Second, install the submersible pump, the cable should be overhead, the power cord should not be too long. Do not force the cable when the unit is launching, which may cause the power cord to break. Submersible pumps do not sink into the mud, otherwise it will lead to bad heat and burn the motor windings. Third, try to avoid the boot at low voltage. When the voltage is too low, the motor speed will drop. If it is less than 70% of the rated speed, the centrifugal switch will be closed and the starting winding will be closed Power for a long time to heat or even burn the windings and capacitors. Do not switch the motor on and off frequently. This is because the pump will run back when it stops. If it is turned on immediately, the motor will start to load, causing the starting current to be too large to burn the winding. Fourth, do not allow the submersible pump long-term overload operation, do not pumping large amounts of water, submersible pump dehydration should not be too long to avoid overheating and burned. During the operation of the unit, the operator must keep an eye on whether the working voltage and current are within the values ​​specified on the nameplate. If not, the motor should be stopped to find out the cause and eliminate the fault. Fifth, usually more than check the motor, found under the crack, rubber seal ring damage or failure, etc., should be promptly replaced or repaired to prevent water penetration into the machine.
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