In the general unblocked sewage sewage submersible sewage pump power has been increased with the increase of flow, simply speaking, the power curve is a curve with the increase of flow, which will provide a problem for the application of the pump: When operating at the working point of the design scheme, the power of the pump is lower than the rated power of the motor, then the application of the pump is reliable, but when the pump head is reduced, the flow will increase and the power will increase. When the flow exceeds the flow of the design scheme and reaches a certain value, the input power of the pump is likely to exceed the rated power of the motor, resulting in motor overload and damage. When the motor is overloaded, it is necessary to maintain the system software position to stop the rotation of the pump, or the maintenance system software failure to damage the motor.

The lift of the submersible sewage pump is less than the lift application of the design scheme working condition, which is often encountered in the specific situation is that when the pump model is selected, the lift of the submersible sewage pump is selected too high, and the specific application of the pump is to reduce the lift application. Another situation is that the working condition of the pump in the application is not clear, that is, the flow of the pump must often be adjusted, and there is also a situation where the pump must often change the position of the application. These three situations are likely to overload the pump and harm the application stability of the pump. It can be said that for pumps that do not have full head characteristics, their application scope will be limited at a greater level.

The full-head feature is that the efficiency of the power curve increases with the increase of flow rate is very slow, and more idealized is that when the flow rate increases to a certain value, the power is not only not easy to rise again, but will have a certain reduction, in other words, the power curve is a curve with a camel's peak, if so, We only need to select the motor rated power slightly beyond the camel peak point of the power value, then in the whole area of 0 flow to larger flow, you no matter which working condition point, the power of the sewage submersible sewage pump can not exceed the motor power and then pump overload, for the pump with such characteristics, whether it is model selection or application, It will be very convenient and reliable. In addition, the motor power should not be too large, which can save rich facility costs. Our email address: Hobanm01@gmail.com.