Patent ID: 7541902
Filing Date: 2009-06-02
Classification: H01H

Abstract:
1. An arc chute for a circuit breaker comprising an arc extinguishing chamber formed by a stack of deionizing plates and an arc formation chamber bounded by a first and second flange situated on each side of a longitudinal mid-plane of said chamber, said arc chute being equipped with permanent magnets at least partially arranged behind the first flange, wherein the arc formation chamber comprises a first enhanced induction section and a diverting section between said enhanced induction section and the arc extinguishing chamber: the enhanced induction section comprising a first part of the permanent magnets generating a magnetic field in the longitudinal mid-plane of said section enabling the electric arc to be propelled, said first part of the permanent magnets comprising two magnetized fractions arranged behind each of the flanges, the diverting section comprising a second part of the permanent magnets generating a substantially weaker magnetic field in the longitudinal mid-plane of said section than that generated by the first part of the permanent magnets and enabling the electric arc to be diverted with respect to the longitudinal mid-plane.