Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1978-02-16
1980-06-03
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
H02H 316
Patent
active
042064902
ABSTRACT:
The invention relates to a security apparatus for detecting a fault such as a short circuit or ground fault in an electrical apparatus. Two similar but oppositely poled detection-and-safety circuits are coupled in parallel such that when one of said detectors energizes, the other does not. The invention also includes safety circuits having back-to-back Zener diodes so that spurious signals below a pre-selected level do not disturb the normal operations of the electrical apparatus being protected.
REFERENCES:
patent: 4099215 (1978-07-01), Parrier et al.
Parrier Andre
Parrier Henri
Parrier Jean
Moose Jr. Harry E.
VanOphem Remy J.
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