Arc chute and circuit breaker equipped with one such arc chute

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.