Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1992-03-12
1994-06-07
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324533, 324544, 379 26, G01R 3111
Patent
active
053193113
ABSTRACT:
Two or more rising pulse waves having different rates of voltage increase are applied to a measuring end of a cable and reflected waves from a fault point on the cable are detected to measure a turnaround propagation time between the measuring end and the fault point. Additionally, ratios of the rates of voltage increase of one pulse wave and the other pulse waves are calculated. A discharge delay time at the fault point is calculated from time differences of the measured turnaround propagation time and the ratios of the voltage increasing speeds and the discharge delay time is subtracted from the measured turnaround propagation time to calculate a real turnaround propagation time.
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patent: 5083086 (1992-01-01), Steiner
Komoda et al, "Development of a Current Detection Type Cable Fault Locator", IEEE Trans. on Power Delivery, pp. 541-545, Apr. 1991.
Arakane Masayoshi
Fujiwara Yasutaka
Kano Tatenori
Kawashima Takao
Shinagawa Jun-ichi
Chuba Electric Power Company, Inc.
Showa Electric Wire and Cable Co., Ltd.
Tobin Christopher
Wieder Kenneth A.
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