US 11,747,392 B2
Self-test auto monitor ground fault circuit interrupter (GFCI) with power denial
Thomas James Batko, Wallingford, CT (US); and Joseph Vincent DeBartolo, North Stonington, CT (US)
Assigned to Hubbell Incorporated, Shelton, CT (US)
Filed by Hubbell Incorporated, Shelton, CT (US)
Filed on May 26, 2021, as Appl. No. 17/331,083.
Application 17/331,083 is a continuation of application No. 16/573,301, filed on Sep. 17, 2019, granted, now 11,025,049.
Application 16/573,301 is a continuation of application No. 15/415,086, filed on Jan. 25, 2017, granted, now 10,418,799, issued on Sep. 17, 2019.
Application 15/415,086 is a continuation of application No. 14/203,610, filed on Mar. 11, 2014, granted, now 9,595,824, issued on Mar. 14, 2017.
Claims priority of provisional application 61/791,114, filed on Mar. 15, 2013.
Prior Publication US 2021/0278477 A1, Sep. 9, 2021
Int. Cl. G01R 31/28 (2006.01); H01H 83/04 (2006.01); G01R 31/50 (2020.01); H02H 3/33 (2006.01); H01H 71/04 (2006.01); H02H 3/04 (2006.01); G01R 31/52 (2020.01); H02H 3/16 (2006.01)
CPC G01R 31/2827 (2013.01) [G01R 31/50 (2020.01); G01R 31/52 (2020.01); H01H 71/04 (2013.01); H01H 83/04 (2013.01); H02H 3/044 (2013.01); H02H 3/162 (2013.01); H02H 3/335 (2013.01); H01H 2071/044 (2013.01); H01H 2300/052 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A circuit interrupting device comprising:
one or more line terminals for connecting to an external power supply;
one or more load terminals for connecting to an external load;
one or more contacts electrically connecting one or more line terminals to one or more load terminals; and
an auto-monitoring circuit configured to
monitor one or more signals to determine an operating state of said circuit interrupting device,
output a first signal having a first voltage level based on the operating state, wherein the first voltage level is greater than zero volts, and
output, after outputting the first signal, a second signal having a second voltage level based on the operating state, wherein the second voltage level is greater than the first voltage level.