Invention Grant
- Patent Title: Ground fault circuit interrupter using frequency recognition and measurement
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Application No.: US16748229Application Date: 2020-01-21
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Publication No.: US11211781B2Publication Date: 2021-12-28
- Inventor: Thomas James Batko , Joseph Michael Meady
- Applicant: Hubbell Incorporated
- Applicant Address: US CT Shelton
- Assignee: Hubbell Incorporated
- Current Assignee: Hubbell Incorporated
- Current Assignee Address: US CT Shelton
- Agency: Michael Best & Friedrich LLP
- Main IPC: H02H3/00
- IPC: H02H3/00 ; H02H3/16 ; H02H3/33 ; H02H3/04 ; H02H3/46 ; H02H3/07

Abstract:
A wiring device including an interrupting device, a fault detection circuit, and a testing circuit. The interrupting device is electrically connecting one or more line terminals to one or more load terminals. The fault detection circuit is configured to detect a fault condition and generate a fault detection signal in response to detecting the fault condition. The fault detection signal being provided to the interrupting device to place the interrupting device in a tripped condition. The testing circuit is configured to determine a frequency of an input voltage at the one or more line terminals, filter the frequency of the input voltage, determine whether the filtered frequency is within a predetermined range, and when the filtered frequency is within the predetermined range, perform a test of the wiring device.
Public/Granted literature
- US20200161849A1 GROUND FAULT CIRCUIT INTERRUPTER USING FREQUENCY RECOGNITION AND MEASUREMENT Public/Granted day:2020-05-21
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