US 11,694,860 B2
Arc chamber for a DC circuit breaker
Rudolf Gati, Mellingen (CH); Matthias Bator, Klettgau (DE); Osvaldo Prestini, Nembro (IT); Pierluigi Cisana, Paladina BG (IT); and Thorsten Strassel, Mülligen (CH)
Assigned to ABB SCHWEIZ AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Dec. 3, 2021, as Appl. No. 17/542,338.
Application 17/542,338 is a continuation of application No. 16/600,680, filed on Oct. 14, 2019, granted, now 11,195,673.
Application 16/600,680 is a continuation of application No. PCT/EP2018/059534, filed on Apr. 13, 2018.
Claims priority of application No. 17166488 (EP), filed on Apr. 13, 2017.
Prior Publication US 2022/0093348 A1, Mar. 24, 2022
Int. Cl. H01H 9/36 (2006.01); H01H 9/34 (2006.01)
CPC H01H 9/346 (2013.01) [H01H 9/341 (2013.01); H01H 9/36 (2013.01); H01H 2009/367 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A DC circuit breaker comprising:
an arc chamber,
wherein the arc chamber comprises:
an entry side adapted to receive an electric arc which was generated outside of the arc chamber and which propagates in a forward direction;
a plurality of stacked splitter plates; and
at least two inhibitor barriers arranged on the entry side to inhibit a reverse propagation of the electric arc out of the arc chamber in a reverse direction;
wherein the at least two inhibitor barriers are arranged, in a top view of the arc chamber, in opposite corner parts on the entry side of the arc chamber, and
wherein the at least two inhibitor barriers at the corner parts on the entry side of the arc chamber are configured such that a flow of gas cannot pass in the reverse direction beyond an entry area of the arc chamber in a region where the at least two inhibitor barriers are provided,
an inlet of an exhaust channel in a region of each of the at least two inhibitor barriers,
wherein the exhaust channel extends to a gas outlet formed on a side of the arc chamber different from the entry side.