D.C. Circuit breaker

Details D.C. Circuit breaker D.C. Circuit breaker

1978-05-15

1980-08-05

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 4, 361 8, H02H 722

Patent

active

042165130

ABSTRACT:
A capacitor and an inductance are connected in parallel with an interruptor disposed in a d-c circuit before the interruptor is mechanically opened. An oscillating current i.sub.o occurs in a circuit composed of the interruptor, the capacitor having a predetermined capacitance and the inductance having a predetermined amount of inductance when the interruptor is mechanically opened. The amplitude of the oscillating current i.sub.o is gradually increased and is superposed on a d-c current I. The interruptor breaks itself when the sum of the d-c current I and the oscillating current i.sub.o across the interruptor reaches zero.

REFERENCES:
patent: 2530939 (1950-11-01), Browne, Jr.
patent: 2849659 (1958-08-01), Kesselring
patent: 2977488 (1961-03-01), Walz et al.
patent: 3522472 (1970-08-01), Breitholtz
patent: 4027123 (1977-05-01), Ihara
"H.V.D.C. Circuit Breakers Using Oscillating Current Techniques", by Yamada et al., Direct Current, Aug. 1966, pp. 87-107.
"Switchgear for H.V.D.C. Lines", by Kukekor et al., Direct Current, Jun. 1959.

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