Solid-state DC circuit breaker

Details Solid-state DC circuit breaker Solid-state DC circuit breaker

2005-10-04

2005-10-04

Leja, Ronald (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S091800

Reexamination Certificate

active

06952335

ABSTRACT:
A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection requirements. The high-speed, solid-state DC circuit breaker uses an emitter turn-off (ETO) thyristor as the switch. The ETO thyristor has an anode, a cathode and first, second and third gate electrodes. The anode is connectable to a source of DC current, and the cathode is connectable to a load. A solid-state trip circuit is connected to the first, second and third gate electrodes for controlling interrpution of DC current to the load by turning off said ETO thyristor.

REFERENCES:
patent: 4581543 (1986-04-01), Herberg
patent: 5262691 (1993-11-01), Bailey et al.
patent: 6163200 (2000-12-01), Iijima
patent: 6426666 (2002-07-01), Li et al.
patent: 6710639 (2004-03-01), Huang et al.
Xu et al., The Emiter turn-Off thyristor-Based DC Circuit Breaker Jan. 27, 2002 IEEE pp. 288-293 vol. 1.

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