Electricity: measuring and testing – Electromechanical switching device – Circuit breaker
Reexamination Certificate
2007-04-03
2007-04-03
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Electromechanical switching device
Circuit breaker
Reexamination Certificate
active
11383194
ABSTRACT:
A portable circuit interrupter shutoff testing device and method, including a high current switch controlled by a timing circuit that allows current to flow through the switch and a small series resistance (in order to trip the instantaneous-trip function of the interrupter, as opposed to the overload-trip) for a short time period relative to the sine wave of the electrical power. A button activates the timing circuit which in turn activates the switch and current flows limited by the internal resistor of the device. By limiting the on time of the device to one or a few half cycles, the user can test if the circuit interrupter responds as quickly as specified by the manufacturer. A method includes receiving a stimulation indication, and selectively connecting an electrical load to wires connected to the circuit interrupter, wherein the electrical load is sufficient to trigger the instantaneous-trip function of the circuit-interrupter.
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Dole Timothy
Hirshfeld Andrew H.
Lemaire Charles A.
Lemaire Patent Law Firm, P.L.L.C.
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