CURRENT SENSING SWITCH FOR USE WITH PUMPS

摘要

A current sensing switch for use with a pump that is physically separate from the pump and contains a current sensor for measuring the electrical current flowing to the pump as a method of determining whether the pump is operating in low fluid, dry conditions, or with an impeller that has ceased to rotate. When the current drops below or raises above a predetermined value for a predetermined amount of time, the switch electrically disconnects power to the pump and reconnects it periodically to cheek whether the state of the pump has changed.

主权项

1. A switch for a pump comprising:
a housing having a plurality of prongs extending therefrom and a plug socket; a circuit board having a relay capable of electrically connecting and disconnecting said prongs to said plug socket; said circuit board further comprising a programmable controller, a current sensor, a data center, a power switch, and a current setting switch; wherein activating said power switch energizes said circuit board and causes said relay to electrically connect said prongs to said plug socket; wherein said current sensor transmits to said data center a measurement of an electric current flowing to said pump through said plug socket; wherein said current setting switch transmits to said data center a current setting value; and wherein said controller compares said measurement from said current sensor to said current setting value such that if said measurement is less than said current setting value for a predetermined amount of time, then said controller causes said relay to electrically disconnect said prongs from said plug socket.