Circuit breaking device

Details Circuit breaking device Circuit breaking device

H - Electricity

01

H

H01H 73/02 (2006.01) H01H 33/59 (2006.01) H01H 83/02 (2006.01) H01H 83/20 (2006.01) H01H 33/14 (2006.01)

Patent

CA 2182821

An objective of this invention is to provide a DC circuit breaking device having functions for transmitting direct currents to an electric power system and interrupting direct currents to the electric power system under abnormal conditions such as grounding and short- circuits, the DC circuit breaking device which can minimize the capacity of a condenser for the commuting circuit while rapidly changing the arc voltage to cause arc currents to be quickly extended and vibrated in order to interrupt direct currents in a short arc time. This DC circuit breaking device comprises a main DC circuit breaker (1) for interrupting the transmission of direct currents to an electric power system; a DC circuit breaker (6) that is connected in series to the main DC circuit breaker (1) and which is smaller than the main DC circuit breaker (1); a commutation circuit that is connected in parallel to the DC circuit breaker (1) and the small DC circuit breaker (6) which are connected together in series and which comprises a reactor (3A) and a condenser (4A); and a surge absorber (5) for the condenser.

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