GROUNDING SWITCH FOR SEALED SWITCHGEAR Russian patent published in 2015 - IPC H02B13/75 H01H33/88 

FIELD: electricity.

SUBSTANCE: invention is intended for fast connection and disconnection of current-conducting elements in sealed switchgear (SSG) to the grounding circuit. The grounding switch for sealed switchgear contains a metal container filled with electroinsulating gas with a current lead inside the container and a fixed contact with a metal screen mounted at the current lead, a hollow movable contact with a piston is installed coaxially to the screen and its piston may move in a cylindrical container thus forming over-piston and below-piston cavities. The movable contact has openings at the piston base, which are coupled to the over-piston cavity within the whole pathway of the movable contact. The blower body is equipped with a screen and a fixed cylindrical insert mounted at the screen protruding over its surface. The fixed contact has a metal opposite electrode of arc-resistant material placed in the contact centre and the movable contact has a metal nozzle placed in its but end part that is covered by the opposite electrode in switched on position.

EFFECT: reducing arcing time and reducing wear of the contact system.

2 dwg