PERMANENT MAGNET ARC EXTINGUISHING DEVICE FOR LOAD INTERRUPTERS

摘要

In a permanent magnet quenching device (6) for quenching arcs in the contact system of load interrupters, a permanent magnet (7) which is provided with magnetic yoke means (11, 12) is supported on a ring element (9) which is galvanically connected to a fixed contact (1) of the load interrupter via retaining clips (8) and forms an arc movement path (10) for the arc foot of an arc produced when disconnecting the contact system. Apart from the arc movement path (10), all free outer surfaces of the permanent magnet quenching device (6) are covered, without gaps, with an integral insulating material sheath (14) which fixes the individual components in their predefined position in a form-fitting manner and insulates the arc movement path from the other metal components of the quenching device.