Vacuum switching chamber having an annular insulator

摘要

A vacuum switching chamber is provided for power switches in the low-voltage range, and has compact design and a high switching capacity. A housing of the switching chamber includes plate-type current terminals, a cylindrical wall part that surrounds flat spiral petal contacts, an annular insulator and a bellows arranged concentrically thereto. The current terminal bolt of the movable spiral petal contact is seated on the associated plate-type current terminal.