VACUUM SWITCHING UNIT Russian patent published in 2009 - IPC H01H33/662 

FIELD: machine building.

SUBSTANCE: vacuum switching unit contains insulating casing, arc-suppressing electrodes and screen system at least from five screens, part of which are isolated and two of near-flange are under electrode potential. Central and isolated screens are implemented in the form of solid of revolution, generatrix of which allows echelon form, additionally each of ends of screen of minor diametre is enveloped by end of major diametre of adjoining screen, and annular channels between adjoining screens in areas of reciprocal overlapping and annular slots between casing and screen fulfil conditions: L≥M; 4≤P/S≤15; where L - length of annular channel; M - width of annular channel; P - depth of annular slot; S - width of slot at the middle of slot depth.

EFFECT: increasing of electric strength of inner insulation of chamber and its keeping up to total output of electrical resource.

2 dwg