Three-phase switchgear

Details Three-phase switchgear Three-phase switchgear

H - Electricity

01

H

306/108

H01H 50/60 (2006.01) H01H 50/00 (2006.01) H01H 50/62 (2006.01) H01H 9/56 (2006.01)

Patent

CA 1179711

ABSTRACT A switchgear apparatus having three switching gaps with contacts arranged thereacross for connecting three-phase electrical power to a consumer. Apparatus is described whereby a selected one of the switching gaps closes earlier than the other switching gaps during a closing cycle of the switchgear, and opens later than the other switching gaps during an opening cycle of the switchgear. The contacts across the early closing and late opening gap experience only minimal contact burnoff, thereby permitting a substantially reduced volume of contact overlay material to be provided therefor. In addition, less expensive contact material may be utilized for this contact.

414619

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