Arc chute and circuit breaker equipped with one such arc chute
AssigneeSchneider Electric Industries SAS
InventorEric Domejean
Life of this patent
Estimating the term…
Abstract
An arc chute including an arc extinguishing chamber formed by a stack of deionizing plates, an arc formation chamber defined by first and second side walls or cheeks, and a system for removing gases generated when an electric arc forms in the chute, that include a removal duct behind the second cheek and connected to an exchange space. The arc extinguishing chamber includes permanent magnets, at least a part of the magnets being behind the first cheek, and the gas removal system includes an opening formed partially in the second cheek and exiting outside the arc chute. A circuit breaker may include such an arc chute.
Claims9
An arc chute for a circuit breaker comprising:
- an arc extinguishing chamber formed by a stack of deionizing plates separated from one another by an exchange space;
- an arc formation chamber defined by first and second cheeks which are substantially symmetrical vis-á-vis a longitudinal axis of the chute;
- and
- means for removing gases generated when an electric arc forms in the chute, comprising a removal duct behind the second cheek and connected to at least one exchange space,
- wherein the arc extinguishing chamber comprises permanent magnets, at least a part of said magnets being located behind the first cheek, and the means for removing gases comprise an opening in the second cheek and exiting outside the arc chute;
- and
- the arc formation chamber comprises:
- an enhanced induction section wherein an electric arc can be propelled towards the arc extinguishing chamber by a magnetic field generated by a first part of the permanent magnets;
- and
- a diverting section in which an electric arc may be diverted with respect to a longitudinal axis of the arc formation chamber towards the first cheek by a magnetic field generated by a second part of the permanent magnets, the whole of the second part of the permanent magnets being located on only one side of the longitudinal axis of the arc formation chamber and only behind the first cheek, and the second part comprising only one magnetized fraction.
Dependencies are inferred from the claim text.