Title:
SYSTEM AND METHOD FOR POLYPHASE GROUND-FAULT CIRCUIT-INTERRUPTERS
Document Type and Number:
WIPO Patent Application WO/2011/041356
Kind Code:
A3
Abstract:
A ground-fault circuit-interrupter (GFCI) system is provided that provides reliable and timely tripping of faulted circuits while minimizing so-called "nuisance" tripping. The GFCI includes a voltage unbalance detection device coupled to the main bus circuit for detecting a voltage unbalance during a fault condition. A computer processor in communication with the voltage unbalance detection device is programmed to determine when an actual fault condition exists based on a state of the voltage unbalance and certain predetermined among the fault signal generated by a GFCI unit in the main bus circuit and the fault signals generated by GFCI units in individual feeder circuits.
Inventors:
HAMER PAUL S (US)
Application Number:
PCT/US2010/050641
Publication Date:
July 21, 2011
Filing Date:
September 29, 2010
Export Citation:
Assignee:
CHEVRON USA INC (US)
HAMER PAUL S (US)
HAMER PAUL S (US)
International Classes:
H02H3/34; G01R31/08; H02H7/26
Foreign References:
| US20070081281A1 | 2007-04-12 | |||
| US7180300B2 | 2007-02-20 | |||
| US5402071A | 1995-03-28 | |||
| US7117105B2 | 2006-10-03 |
Attorney, Agent or Firm:
HANZE, Carlos, L. et al. (Law DepartmentPost Office Box 600, San Ramon CA, US)
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