Vacuum switching device for a circuit having a main current path and an auxiliary current path

A vacuum switching device, comprising:

• a housing body formed with an electrically insulating material;
• a stationary electrical contact, which is spatially fixed relative to said housing body and within said housing body;
• a movable electrical contact, which is movably arranged relative to said housing body and within said housing body, wherein, when said movable electrical contact is moved toward said stationary electrical contact, an electrical contact is established between said stationary and movable electrical contacts and, when said movable electrical contact is moved away from said stationary electrical contact, the electrical contact is interrupted;
• and
• a sliding bearing connected to said housing body and supporting said movable electrical contact for a sliding movement toward and away from said stationary electrical contact;
• said sliding bearing having an electrically conductive material and being configured to at least partially electrically shield said housing body;
• and
• said sliding bearing having a spring support configured to support a spring element disposed to press said movable electrical contact in a direction toward said stationary electrical contact;
• said movable electrical contact having a contact section, an axial shaft section connected thereto, and a shaft spring support;
• said spring element being seated coaxially on said shaft section and being pretensioned between said spring support of said sliding bearing and said shaft spring support of said movable electrical contact;
• said sliding bearing having a tubular sliding section that is seated so as to slide coaxially on said shaft section of said movable electrical contact, and a shielding section that extends radially externally from said sliding section and at least partially electrically shields said flange of said housing body;
• and
• said shielding section of said sliding bearing being formed with at least one slot extending in a spiral shape.