Leakage current detection and interruption circuit with...

Details Leakage current detection and interruption circuit with... Leakage current detection and interruption circuit with...

2009-08-11

2011-11-22

Patel, Dharti (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S043000, C361S044000, C361S045000, C361S046000, C361S047000, C361S048000, C361S049000

Reexamination Certificate

active

08064174

ABSTRACT:
A circuit is disclosed for disconnecting a power source upon the detection of a leakage current comprising a power cable having an insulated first and a second wire. The power cable has a conductive shield surrounding the first and second wires with a drain wire electrically contacting the conductive shield. A disconnect switch is interposed between the power source and the power cable. A primary circuit controls the disconnect switch. A secondary circuit is connected to the drain wire for sensing a leakage current between the conductive shield and one of the first and second wires. An optical switch interconnects the primary circuit and the secondary circuit for opening the disconnect switch upon the secondary circuit sensing a leakage current.

REFERENCES:
patent: 3590325 (1971-06-01), McMillen
patent: 3619688 (1971-11-01), McQueen et al.
patent: 3657603 (1972-04-01), Adams
patent: 3719859 (1973-03-01), Frantz et al.
patent: 3784846 (1974-01-01), Krick et al.
patent: 3814991 (1974-06-01), Hewitt
patent: 3950675 (1976-04-01), Weber et al.
patent: 3996496 (1976-12-01), Volk, Jr.
patent: 4038061 (1977-07-01), Anderson et al.
patent: 4122413 (1978-10-01), Chen
patent: 4131927 (1978-12-01), Tsuchiya et al.
patent: 4205358 (1980-05-01), Washington
patent: 4281358 (1981-07-01), Plouffe et al.
patent: 4352998 (1982-10-01), Baker et al.
patent: 4415943 (1983-11-01), Wortman
patent: 4424544 (1984-01-01), Chang et al.
patent: 4502287 (1985-03-01), Hare et al.
patent: 4543527 (1985-09-01), Schuchmann et al.
patent: 4554463 (1985-11-01), Norbeck et al.
patent: 4580186 (1986-04-01), Parker et al.
patent: 4584623 (1986-04-01), Bello et al.
patent: 4717841 (1988-01-01), Dumortier et al.
patent: 4858056 (1989-08-01), Russell
patent: 4931894 (1990-06-01), Legatti
patent: 4947278 (1990-08-01), Nichols, III
patent: 4979070 (1990-12-01), Bodkin
patent: 5037999 (1991-08-01), VanDeusen
patent: 5065104 (1991-11-01), Kusko et al.
patent: 5107076 (1992-04-01), Bullock et al.
patent: 5132491 (1992-07-01), Mulrooney et al.
patent: 5142428 (1992-08-01), Takeda
patent: 5208426 (1993-05-01), Kennedy et al.
patent: 5212350 (1993-05-01), Gebs
patent: 5216202 (1993-06-01), Yoshida et al.
patent: 5229730 (1993-07-01), Legatti et al.
patent: 5237480 (1993-08-01), Dara
patent: 5254188 (1993-10-01), Blew
patent: 5262691 (1993-11-01), Bailey et al.
patent: 5293001 (1994-03-01), Gebs
patent: 5329064 (1994-07-01), Tash et al.
patent: 5365394 (1994-11-01), Ibarguengoitia
patent: 5391836 (1995-02-01), Bortas et al.
patent: 5416268 (1995-05-01), Ellis
patent: 5418678 (1995-05-01), McDonald
patent: 5455469 (1995-10-01), Ward
patent: 5459336 (1995-10-01), Kato
patent: 5463521 (1995-10-01), Love
patent: 5528445 (1996-06-01), Cooke et al.
patent: 5600524 (1997-02-01), Neiger et al.
patent: 5661623 (1997-08-01), McDonald et al.
patent: 5774316 (1998-06-01), McGary et al.
patent: 5847913 (1998-12-01), Turner et al.
patent: 5889643 (1999-03-01), Elms
patent: 6002563 (1999-12-01), Esakoff et al.
patent: 6014297 (2000-01-01), Clarey et al.
patent: 6057996 (2000-05-01), Kim
patent: 6091591 (2000-07-01), Heinz et al.
patent: 6111732 (2000-08-01), Beland
patent: 6111733 (2000-08-01), Neiger et al.
patent: 6218647 (2001-04-01), Jones
patent: 6252365 (2001-06-01), Morris et al.
patent: 6262871 (2001-07-01), Nemir et al.
patent: 6265667 (2001-07-01), Stipes et al.
patent: 6292337 (2001-09-01), Legatti et al.
patent: 6381113 (2002-04-01), Legatti
patent: 6404265 (2002-06-01), Guido, Jr. et al.
patent: 6414829 (2002-07-01), Haun et al.
patent: 6504691 (2003-01-01), Matsui et al.
patent: 6525914 (2003-02-01), Legatti
patent: 6697238 (2004-02-01), Bonilla et al.
patent: 6807036 (2004-10-01), Baldwin
patent: 6829123 (2004-12-01), Legatti et al.
patent: 6850394 (2005-02-01), Kim
patent: 7136266 (2006-11-01), Gershen et al.
patent: 2002/0145838 (2002-10-01), Bonilla et al.
patent: 2003/0202310 (2003-10-01), Field et al.
patent: 2004/0037018 (2004-02-01), Kim
patent: 2004/0070895 (2004-04-01), Gershen et al.
patent: 2004/0070899 (2004-04-01), Gershen et al.
patent: 2004/0190686 (2004-09-01), Tidwell et al.
Belden Inc. Belden Electronics Division Catalog. Ref. MCAT-2003. Copyright Belden Inc. 2003.

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