H - Electricity – 01 – H
Patent
H - Electricity
01
H
348/39
H01H 47/32 (2006.01) H01H 9/54 (2006.01)
Patent
CA 1190310
A b s t r a c t A switching device for opening and closing electrical circuits, in which, parallel to each contact, located in the main circuit to be switched, of a magnet- controlled switchgear, an electronic switch and a contact, serving as an isolator, of a further magnet-controlled auxiliary switchgear are connected in series, and there is a control device which connects through the electronic switch before any change in switching state of the magnet- controlled switchgear located in the main circuit and which then blocks it again, the contacts of the auxiliary switchgear which are in series with the electronic switch being closed, there being a central control unit which has for each of the switching elements (1, 1', 2, 2', 3) a separate selection circuit (16, 16', 17, 18, 18'), and these selection circuits comprise test loops connected to sensors monitoring the switching state of the switch- ing elements (1, 1', 2, 3) and/or their selection and are linked to one another preferably in dependence on commands transmitted from the central control unit (9).
413319
Naimer Hubert L.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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