Process for controlling an overcurrent tripping device of a high

Details Process for controlling an overcurrent tripping device of a high Process for controlling an overcurrent tripping device of a high

1994-09-01

1997-01-21

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 87, H02H 300

Patent

active

055964729

ABSTRACT:
A process for controlling an overcurrent tripping device of a high-speed d.c. circuit breaker. The input voltage can reach a signal evaluation device for current rise rate via two different paths. The tripping of the high-speed d.c. circuit-breaker is no longer fundamentally delayed by the unavoidable delay experienced by signals applied to a filtering device. A path for the input voltage, existing in parallel to the filter path can be designed such that when the current rises very steeply, the unfiltered (and thus also undelayed) signal reaches the signal evaluation device (i.e., the signal bypasses the filter and is applied to the signal evaluation device) whereas, when the current rises more slowly, the filtered signal is evaluated.

REFERENCES:
patent: 3914667 (1975-10-01), Waldron
patent: 4259706 (1981-03-01), Zocholl
"Neues Streckenschutz-Konzept gegen Speiseleitungsstorungen bei Gleichstrom-Verkehrsnetzen," Brown Boveri Mitt, No. 9/10-83, pp. 372-378 (1983).

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