US 5,493,090 AGranted

Two-step operating mechanism for combined interrupter disconnect switch

AssigneeABB Power T&D Company Inc.

InventorsMarkus Vestner, Tomas Otterberg

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Abstract

An operating mechanism for a combined interrupter and disconnect switch comprises an operating crank and an interrupter support housing which are separately rotatable about a common pivotal axis. The interrupter switch is part of a disconnect switch arm and is secured to the support housing. The interrupter contacts are operated by a linearly movable rod which has an end connected to a lever extending from the operating crank and is movable thereby. A crank arm connected to said operating crank is connected to and moved by a linearly movable operating shaft. A spring-biased latch lever is pivotally mounted to the interrupter support housing and releasably engages the free end of the crank arm lever so that the housing rotates with the crank for a first portion of the rotation of the crank and closes the disconnect switch. When the disconnect switch closes, the latch releases and the crank rotates relative to the housing to operate the linearly movable rod which operates the interrupter switch.

Claims10

Dependent claims

An operating mechanism for operating a combined disconnector and interrupter wherein the interrupter is a component of the rotating contact arm of the disconnector and wherein the interrupter contains interrupter contacts operated by a linearly movable operating rod;

said operating mechanism comprising, in combination:
an operating crank having a pivotal support axle, a crank arm and a crank lever;
said crank lever having a free end, pivotally connected to said linearly movable operating rod;
a stationary support member pivotally receiving said pivotal support axle;
a rotatable support member pivotally mounted on said stationary support member and coaxial with said pivotal support axle;
one end of said interrupter being fixed to said rotatable support member;
a latch lever pivotally mounted to said rotatable support member and having a latch surface and tension spring means for rotating said latch surface into latching engagement with said free end of said crank lever;
a crank lever stop fixed to said rotatable support member for engaging said crank lever after said crank arm has rotated through a first portion of its motion while moving said linearly movable operating rod to an open position;
a rotatable support member stop fixed to said stationary support member for engaging said rotatable support member after said crank arm has engaged said crank lever stop and has subsequently rotated through a second portion of its motion;
said latch lever being cammed to release said crank lever after said rotatable support member is rotated to a position at which said disconnector closes.

7 more elements

Dependencies are inferred from the claim text.