Commutation type DC breaker

Details Commutation type DC breaker Commutation type DC breaker

1993-02-12

1995-09-19

Deboer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 4, 361 9, H01H 930

Patent

active

054521700

ABSTRACT:
A commutation type DC breaker having a commutation circuit electrically connected in parallel to a main contact. The main contact is connected between a DC power supply and a load. The commutation circuit is a series circuit of a commutation capacitor, a reactor and a commutation switch, with an energy absorption device electrically connected in parallel to the main contact. A switch or a breaker for preventing the flow of commutation current from the commutation circuit to the load in a non-load opening mode is connected between an electrical connection point (P), of the main contact and the commutation circuit, and the load and is opened substantially simultaneously with the opening of the main contact, or before the closure of the commutation switch. In this manner, the safety on the load in the non-load opening mode is enhanced.

REFERENCES:
patent: 3529210 (1970-09-01), Ito et al.
patent: 4740858 (1988-04-01), Yamaguchi et al.
patent: 5214557 (1993-05-01), Hasegawa et al.
A. Erik/M. Schmelzle, "Grundlagen der Schaltgeratetechnik", 1974, pp. 13-21.

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