NEWS

Recently, a wind turbine with a "jack-up" hybrid tower design was launched in a wind power project in Henan Province of the State Power Investment. The hub of the unit is 170 meters high and can support a 3.6MW wind turbine with a rotor diameter of 155 meters, marking a new high in the height of China's onshore wind turbine!

1. Before enabling the submersible sewage pump, it is necessary to install a special leakage protection switch or an overload protection switch that matches the specifications, so that when the submersible sewage pump fails in use, it can be reliably and effectively protected and will not damage the submersible motor. Stator windings, even the entire motor.
2, submersible pumps need to adopt maintenance grounding, in order to ensure the use of personal safety. If there is no maintenance grounding, once the shell leakage, it will constitute the water at the outlet of the submersible pump and the water surface of the pumping, endangering the safety of humans and animals, while wasting a lot of electricity. If the metal shell of the submersible pump is connected with the grounding body (grounding resistance is not more than 4Ω) conforming to the national standard, when the submersible pump shell leaks, the current flows through the metal shell of the submersible pump, maintenance grounding wire, grounding body, earth, transformer operation grounding wire and power supply to form a closed loop. When the leakage flows through the submersible pump, especially when the front touches the shell, the maintenance device of the submersible pump can be operated to block.

3. The difference between the power supply voltage and the rated voltage cannot be 10%. If the voltage is too high, the motor will overheat and burn out the winding. If the voltage is too low, the motor speed will drop. If 70% of the rated speed is not reached, the centrifugal switch will be turned on, resulting in heating and even burning out the winding and capacitor during the time of starting the winding group. Do not switch the motor frequently, because the electric pump will produce backflow when it stops. If it is turned on immediately, it will start the motor load, resulting in excessive starting current and burning out the winding.

4. In order to prevent the submersible pump from overloading for a long time, do not use the low-lift pump for high-lift operation, do not pump water with large sediment concentration (heavy mud), and investigate whether the current value is within the scope of the rules at any time. If it is found that the current is too large, it should be stopped to check. In addition, the submersible pump to water as a cooling source, therefore, the submersible pump dehydration operation time should not be too long.

5. If the submersible pump sinks into the mud during use, it will cause poor heat dissipation and burn out the motor windings. Therefore, the submersible pump must not be used in the silt environment. In order to prevent the submersible pump from sinking into the silt, it is necessary to remove the silt in the working environment before the submersible pump is launched, so as to prevent the waste from blocking the water inlet gate, causing the motor to heat up and the water outlet is not smooth.

6. Before using the submersible sewage pump, check whether the motor or the sealed oil chamber is full of oil. If it is not filled in accordance with the regulations, it should be filled to the specified oil level.