1. Before the work of the technical test: line inspection submersible pump value of the discharge of electrical lines should be complete, and the connection is correct and reliable. There must be an over current protection device. If the knife switch, you must use a qualified fuse, shall not be arbitrarily bold or replaced by other metal wire. The cable to connect accurately, prevent the power line fault in the zero line of motor. The electric motor is connected with lead wire and cable must be reliable, otherwise they will have a bad fever, resulting in a short circuit or open circuit.
The ground wire motor must be in conformity with the technical standards of ground wire.
Cable into the water for 22 hours after the dip, with 500V or 1000V to check the insulation of the motor windings to the ground insulation, resistance should not be less than 5 mb.
The test of some submersible pumps are reversing all the water, but the reverse rotation of the small amount of water, and the current increase in the motor windings. Therefore, the unit should first before launching into the motor can be filled with pure water (officially launched for operation of wet submersible pump, and the pump body to water lubricated bearings, and then connect the power, instantaneous start motor, observe the motor rotating column message to I help you off to the facilities, there is no exception to the right to confirm.
Pump set in the correct position of the water pump in the water should be kept upright, not inclined. Fixed should be reliable, especially not buried in the soil, in order to prevent burning electric pump. Dive depth should be maintained at 1~2 meters below the water, not less than 3 meters from the bottom of the bottom, in order to pump clean water.
2. Start the motor the correct use of runtime should first close the gate, to be operating normally and then slowly opened, adjusted to the required flow, and observe the pressure gauge and a current meter is correct, food group should be no vibration and noise. If any of the above abnormalities, should be ruled out after the failure of the work.
Should always observe the instrument, when the voltage is less than 340V, the current is greater than 20% of the motor rated current, should be immediately shut down for maintenance.
Periodic inspection of insulation. Run periodically check the thermal state of the motor on the ground insulation resistance, such as the resistance value of less than 500 billion ohm, should be immediately shut down for maintenance. This insulation inspection should be carried out once a week to ensure safety.
Requirements for well water and well. Water sediment concentration should be less than 0.2%, otherwise it will damage the pump seal. Well diameter and well depth should be adapted to the type of pump group.
Pump group should not be frequently open and stop. When the pump unit to start again, must be in the pipeline in the water after the pharyngeal flow can be started, generally require about 5 minutes. Otherwise, the load will cause the current to increase too much damage to the motor.
To prevent leakage of wounding. The pump group is running, in order to avoid the occurrence of leakage wounding, in addition must be equipped with leakage protection device, is also prohibited personnel contact in the water outlet of the water near the water.
