Title:
INSTANTANEOUS ARC FAULT LIGHT DETECTOR WITH RESISTANCE TO FALSE TRIPPING
Document Type and Number:
WIPO Patent Application WO2001024337
Kind Code:
A3
Abstract:
The present invention discloses an improved arc fault detection circuit comprising a light detector for generating a light detector signal, a differentiator circuit for receiving a light detector signal and creating a differentiated light detector signal, and a comparator circuit for comparing the differentiated light detector signal and a reference signal and generating a comparator output signal for indicating when the differentiated light detector signal exceeds the reference signal.
Inventors:
PHILLIPS TIMOTHY B
Application Number:
PCT/US2000/022502
Publication Date:
September 26, 2002
Filing Date:
August 16, 2000
Export Citation:
Assignee:
SQUARE D CO (US)
International Classes:
G01R31/12; H02H1/00; G01R31/327; (IPC1-7): H02H1/00; G01R31/12
Foreign References:
| DE3141374A1 | 1983-04-28 | |||
| CH676174A5 | 1990-12-14 | |||
| US4709291A | 1987-11-24 |
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