Arrangement for gas circuit breaker with reactor and capacitor c

Details Arrangement for gas circuit breaker with reactor and capacitor c Arrangement for gas circuit breaker with reactor and capacitor c

1996-04-18

1997-09-16

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 2, 361113, 361115, H02H 300, H01H 930

Patent

active

056686919

ABSTRACT:
A small-sized arrangement for a DC circuit breaker with a reactor and a capacitor connected in series is provided which includes a DC circuit breaker, a parallel impedance means with a suitably determined inductance and a suitable capacitance less in value than the inductance, and an energy-absorbing element. The parallel impedance means has a parallel reactor of a carefully selected inductance and a parallel capacitor of a smaller capacitance value. Determining the inductance and capacitance values of the parallel reactors and parallel capacitors employed in the parallel impedance means to satisfy a certain condition defined by specific formulas can cause the DC circuit breaker to take full advantage of the inherent performance thereof while allowing the interruption time to remain minimized, thereby achieving enhanced interruption performance. Since the capacitance of the parallel capacitor is rendered relatively smaller, the device can be small in size and low in cost.

REFERENCES:
patent: 4578730 (1986-03-01), Tokuyama
patent: 5402297 (1995-03-01), Ouchi et al.
Y. Yoshida et al., "A Study of DC-Current Interruption for GCB with Parallel Capacitor and Reactor", Proceedings of the Fifth Annual Conference of Power & Energy Society, IEE of Japan, (Session II, Short Papers), Jul. 27-29, 1994, pp. 824-826.

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