Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1990-10-24
1991-10-22
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324523, 324532, G01R 3108
Patent
active
050599119
ABSTRACT:
Apparatus and method for detecting a location of a break in a conductor of cable, the cable having a multiple number of conductors. The conductors that are not under investigation are connected to ground potential. The conductor that is under investigation is connected to a timer, a resistor, and a DC voltage source that in turn is connected to ground potential. Charging current flows into the conductor under investigation. The time that it takes for the current to decrease to (1/e) of the current's initial value is measured by the timer. Alternately, the conductor that is under investigation is connected to a resistor and a DC voltage source that in turn is connected to ground potential. This conductor is also connected to a voltage level timer that is connected to ground potential. The charging voltage of the conductor increases. The time that it takes for the charging voltage to increase to (1-1/e) of the voltage value of the DC voltage source, is measured by the timer. The length of a measured time is indicative of the distance of a break from the DC voltage source.
REFERENCES:
patent: 3777217 (1973-12-01), Groce et al.
patent: 4160947 (1979-07-01), Tanno et al.
patent: 4839598 (1989-06-01), Calvert et al.
Brown Glenn W.
Tarlano John P.
The United States of America as represented by the Secretary of
Wieder Kenneth A.
Wohlfarth Robert M.
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