Patent ID: 8678303
Filing Date: 2014-03-25
Classification: F04D,Y10T

Abstract:
1. A method for operating a grinder pump station for processing and pumping sewage and inhibiting the likelihood of operation of a grinder pump assembly under at least one of a run dry condition and a blocked condition, the method comprising: providing the grinder pump assembly comprising a motor operably connected to a cutting mechanism and to a pump; providing a tank having an inlet for receiving sewage and in which the grinder pump assembly is receivable; providing a wattmeter circuit operably connected to the grinder pump assembly; measuring real power using the wattmeter circuit without determining a power factor or a phase angle during operation of the grinder pump assembly to process sewage received in the tank and discharge the processed sewage from the tank; and automatically turning off the grinder pump assembly based on the real power measured by the wattmeter circuit without determining a power factor or a phase angle due to the at least one of a run dry condition and a blocked condition.