Moving contact for localized gas flow arc spinner type interrupter

摘要

A moving contact structure for an arc spinner type of interrupter is provided with a flow channel which communicates with the arcing region and permits the flow of arc plasma away from the arcing region during interruption. The flow channel in one embodiment of the invention is defined by openings near the end of a hollow elongated movable contact part. In a second embodiment of the invention, a restricted volume is provided behind the arcing contact and this volume is expanded during the interruption process to produce a negative pressure during the interruption process which will promote the flow of arc plasma away from the arc space and into the region behind the arcing contact.