Switching device

摘要

A switching device includes a contact system having a movable contact to be moved along a movement direction, a stationary contact and an improved arc quenching device with a configuration for generating a magnetic field formed in a plane perpendicular to the movement direction and an electrode configuration having a first electrode conductively connected to the movable contact and a second electrode conductively connected to the stationary contact. The first electrode and the second electrode are disposed in such a way that an electric field can be generated between the first electrode and the second electrode perpendicularly to the direction of movement and perpendicularly to the magnetic field.

主权项

1. A switching device, comprising:
a contact system having a movable contact being movable along a movement direction and a stationary contact; an arc quenching device having a configuration for generating a magnetic field in a plane perpendicular to said movement direction and an electrode configuration having a first electrode being conductively connected to said movable contact and a second electrode being conductively connected to said stationary contact; said first electrode and said second electrode being disposed for forming an electric field between said first electrode and said second electrode perpendicular to said movement direction and perpendicular to said magnetic field; said contacts of said contact system being separated in an event of a short-circuit current and forming an arc having electrically conductive charged plasma particles; the magnetic field generating the electric field and causing a movement of the plasma particles of the arc toward said electrodes; and the movement of the plasma particles in the magnetic field creating an electric field generating a countercurrent formed counter to an externally applied voltage and counteracting an arc voltage and causing or supporting arc quenching.