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AssigneeABB Technology AG
InventorsOlaf Hunger, Max Claessens, Martin Holstein, Johan Abrahamsson, Martin Kriegel
Estimating the term…
The heavy-duty circuit breaker can be filled with a quenching gas and contains a first moveable arcing contact piece and a second moveable arcing contact piece as well as a drive for driving the first arcing contact piece and an auxiliary drive for driving the second arcing contact piece. An arc may burn between the arcing contact pieces. The heavy-duty circuit breaker has a heating chamber for temporarily storing quenching gas heated by the arc and an insulating nozzle, which has a throat for guiding a quenching gas flow, which throat is connected to the heating chamber by means of a channel. The throat can be blocked at least partially by one of the two arcing contact pieces, which is referred to as the blocking contact piece. The auxiliary drive is designed such that, during an opening operation, a movement direction reversal of the second arcing contact piece from a movement in opposite directions to a movement in the same direction of the two arcing contact pieces takes place, if the throat is no longer at least partially blocked by the blocking contact piece. Advantageously, the gear is a gear which is driven by the drive.
A heavy-duty circuit breaker, which can be filled with a quenching gas, having a first moveable arcing contact piece and a second moveable arcing contact piece, having a drive for driving the first arcing contact piece and an auxiliary drive for driving the second arcing contact piece, having an arc which may burn between the arcing contact pieces, having a heating chamber for temporarily storing quenching gas heated by the arc, and having an insulating nozzle, which has a throat for guiding a quenching gas flow, which throat is connected to the heating chamber by means of a channel and can be blocked at least partially by one of the two arcing contact pieces, which is referred to as the blocking contact piece, the auxiliary drive being designed such that, during an opening operation, a movement direction reversal of the second arcing contact piece from a movement in opposite directions to a movement in the same direction of the two arcing contact pieces takes place, wherein the auxiliary drive is designed such that, during an opening operation, the movement direction reversal of the second arcing contact piece takes place if the throat is no longer at least partially blocked by the blocking contact piece.
A method for opening a heavy-duty circuit breaker having a first moveable arcing contact piece and having a second moveable arcing contact piece, the two arcing contact pieces being moved in opposite directions relative to one another and being separated from one another, and a throat of an insulating nozzle being at least partially blocked by one of the two arcing contact pieces, which is referred to as the blocking contact piece, and the movement direction of the second arcing contact piece being reversed, wherein the movement direction of the second arcing contact piece is reversed, if the throat is no longer at least partially blocked by the blocking contact piece.
Dependencies are inferred from the claim text.