Patent ID: 7972117
Filing Date: 2011-07-05
Classification: F04B

Abstract:
1. A pump control system for a submersible pump used to remove water in an enclosed space, comprising: a pump controller, said pump controller is electrically connected to the submersible pump and capable of activating and deactivating the submersible pump, wherein the pump controller comprises a primary circuit and a secondary sensing circuit, said pump controller is adapted to activate the submersible pump when water has reached a first level in the enclosed space and to deactivate the submersible pump when water has reached a second level that is below the first level, wherein said pump controller incorporates one or more sensing devices that are capable of detecting the presence of a non-conductive fluid in water, wherein said one or more sensing devices comprise one or more capacitance based sensors or one or more conductivity based sensors; and an auxiliary control device, said auxiliary control device is adapted to automatically override the pump controller and deactivate the submersible pump, by de-energizing the pump controller, if the submersible pump remains activated when water reaches a third level in the enclosed space, wherein said third level is below the second level, said auxiliary control device is adapted to automatically re-energize the pump controller by closing the secondary sensing circuit in the pump controller when water rises to the second level after the pump controller has been deactivated by the auxiliary control device.