Drawout switchgear

Claim 2

Drawout switchgear comprising a stationary assembly and a movable assembly, said stationary assembly comprising stationary main terminal means, said movable assembly comprising movable main terminal means, track means supporting said movable assembly on said stationary assembly for movement between a first position wherein said movable main terminal means is connected to said stationary main terminal means and a second position wherein said movable main terminal means is disconnected from said stationary main terminal means, a levering structure on said stationary and movable assemblies, said levering structure being manually operable to move said movable assembly on said track means between said first and second positions, interlock means comprising an interlock member movably supported on said movable assembly, said interlock member being automatically movable to an interlocking position when said movable assembly is moved to said first position to lock said movable assembly in said first position, said interlock member being manually movable to a non-interlocking position, an interlock defeating member on said stationary assembly for cooperation with said interlock member, said interlock defeating member being manually movable to an interlock defeating position, with said movable assembly in said first position and said interlock member in said interlocking position said interlock member being manually movable to the non-interlocking position and while said interlock member is held in the non-interlocking position said interlock defeating member being manually movable to the interlock defeating position to engage said interlock member and maintain said interlock member in the non-interlocking position upon release of said interlock member whereby said interlock member will be maintained in the non-interlocking position without being manually held in the non-interlocking position as an operator manually operates said levering structure to move said movable assembly on said track means from said first position to said second position.

Claim 3

Drawout switchgear according to claim 1, said stationary assembly comprising a plate member having a slot therein, said interlock member on said movable assembly comprising a lock part and spring biasing means biasing said interlock member toward the interlocking position, when said movable assembly reaches said first position said spring biasing means biasing said interlock member to bias said lock part into locking engagement in said slot.

Claim 4

Drawout switchgear according to claim 2, pivot support means pivotally supporting said interlock member intermediate the ends of said interlock member, said lock part being disposed on a first side of said pivot support means, and said interlock member being manually engageable on the second side of said pivot support means opposite said first side and being manually movable about said pivoT support means to the non-interlocking position.

Claim 5

Drawout switchgear according to claim 3, and said interlock defeating member being pivotally mounted on said stationary assembly and manually pivotally movable to a position in interengagement with said interlock member to maintain said interlock member in the non-interlocking position to enable movement of said movable assembly from said first position by operation of said manually operable levering structure.

Claim 6

Drawout switchgear according to claim 4, said levering structure comprising a pair of levers supported in a spaced relationship on said stationary assembly and connected for simultaneous movement about a fixed pivot, said levering structure comprising a crank arm connected to move said pair of levers, and said movable assembly comprising a pair of projecting parts engageable by said pair of levers such that said pair of levers operating against said projecting parts will drive said movable assembly between said first and second positions upon operation of said crank arm.

Claim 7

Drawout switchgear according to claim 4, said levering structure comprising a pair of levers supported on said stationary assembly in a spaced relationship and connected for simultaneous pivotal movement, said levering structure comprising a pair of projecting parts on said movable assembly cooperable with said pair of levers, and said levering structure comprising a screw type operator on said stationary assembly rotatable to pivot said pair of levers to thereby drive said projecting parts to lever said movable assembly between said first and second positions.

Claim 8

Drawout switchgear according to claim 1, said movable assembly comprising a circuit breaker, said circuit breaker comprising a pair of contacts and trip means operable to a tripped position to effect automatic opening of said contacts and to maintain said contacts in the open position while said trip means is in the tripped position, and trip actuating means operatively connecting said interlock member with said trip means such that said trip means will be in the tripped position when said interlock member is in said non-interlocking position.

Claim 9

Drawout switchgear comprising a stationary assembly and a movable assembly, said stationary assembly comprising stationary main terminal means, said movable assembly comprising movable main terminal means, track means supporting said movable assembly on said stationary assembly for movement between a first position wherein said movable main terminal means is connected to said stationary main terminal means and a second position wherein said movable main terminal means is dis-connected from said stationary main terminal means, a levering structure on said stationary and movable assemblies manually operable to move said movable assembly on said track means between said first and said second positions, interlock means comprising an interlock member movably supported on said movable assembly and automatically movable to an interlocking position when said movable assembly is moved to the connected position to lock said movable assembly in said connected position, said interlock member being manually movable to a non-interlocking position to permit movement of said movable assembly from said first position to said second position, said switchgear comprising a circuit breaker, said circuit breaker comprising a pair of contacts and an operating mechanism operable to open and close said contacts, said circuit breaker comprising a trip member movable to a tripping position to effect automatic opening of said contacts, trip actuating means on said movable assembly, said trip actuating means comprising an elongated member operatively connected to said interlock member and supported for generally rectilinear movement, said trip actuating means comprising an intermediate member, pivot support means pivotally supporting said intermediate member intermediate the ends of said intermediate member, means operatively connecting said intermediate meMber to said elongated rectilinearly movable member on one side of said pivot support means, said trip actuating means comprising actuating means connected to said intermediate member on the other side of said pivot support means, and upon movement of said interlock member to said non-interlocking position said elongated member moving rectilinearly to drive said intermediate member about said pivot support means to thereby drive said actuating means to a tripped position during which movement said actuating means operates said trip member to said tripping position.

Claim 10

Drawout switchgear comprising a stationary assembly and a movable assembly, said stationary assembly comprising stationary main terminal means, said movable assembly comprising movable main terminal means, track means supporting said movable assembly on said stationary assembly for movement between a first position wherein said movable main terminal means is connected to said stationary main terminal means and a second position wherein said movable main terminal means is dis-connected from said stationary main terminal means, a levering structure on said stationary and movable assemblies manually operable to move said movable assembly on said track means between said first and said second positions, interlock means comprising an interlock member movably supported on said movable assembly and automatically movable to an interlocking position when said movable assembly is moved to the connected position to lock said movable assembly in said connected position, said interlock member being manually movable to a non-interlocking position to permit movement of said movable assembly from said first position to said second position, said switchgear comprising a circuit breaker, said circuit breaker comprising a pair of contacts and an operating mechanism operable to open and close said contacts, said circuit breaker comprising a trip member movable to a tripping position to effect automatic opening of said contacts, trip actuating means on said movable assembly, said trip actuating means comprising an elongated member operatively connected to said interlock member and supported for generally rectilinear movement, said trip actuating means comprising an intermediate member, pivot support means pivotally supporting said intermediate member intermediate the ends of said intermediate member, means operatively connecting said intermediate meMber to said elongated rectilinearly movable member on one side of said pivot support means, said trip actuating means comprising actuating means connected to said intermediate member on the other side of said pivot support means, and upon movement of said interlock member to said non-interlocking position said elongated member moving rectilinearly to drive said intermediate member about said pivot support means to thereby drive said actuating means to a tripped position during which movement said actuating means operates said trip member to said tripping position.

Claim 11

Drawout switchgear according to claim 8, said interlock member being pivotally supported intermediate the ends thereof on said movable assembly, and lost-motion connecting means connecting said interlock member to said elongated member of said trip actuating means.

Claim 12

Drawout switchgear comprising a stationary assembly and a movable assembly, secondary contact means comprising a stationary secondary contact structure on said stationary assembly and a movable secondary contact structure on said movable assembly, said stationary secondary contact structure comprising a pair of generally flat stationary insulating boards and support means supporting said stationary insulating boards in a spaced relationship, a plurality of pairs of stationary contacts supported on the opposite sides of said stationary insulating boards, said movable secondary contact structure comprising a pair of generally flat movable insulating boards and support means supporting said movable insulating boards in a spaced relationship, a plurality of pairs of movable contacts supported on opposite sides of said movable insulating boards, said support means comprising a plurality of separate generally U-shaped insulating supports between said movable insulating boards in a spaced relationship, upon movement of said movable secondary contact structure from a disconnected position to a test position each of said pairs of movable contacts engaging the outer sides of a separate pair of said stationary contacts and said U-shaped insulating supports moving between adjacent stationary contacts to guide said movable contacts into aligned engagement with said stationary contacts.

Claim 13

Drawout switchgear comprising a stationary assembly and a movable assembly, secondary contact means comprising a stationary secondary contact structure on said stationary assembly and a movable secondary contact structure on said movable assembly, said stationary secondary contact structure comprising a pair of generally flat stationary insulating boards and support means supporting said stationary insulating boards in a spaced relationship, a plurality of pairs of stationary contacts supported on the opposite sides of said stationary insulating boards, said movable secondary contact structure comprising a pair of generally flat movable insulating boards and support means supporting said movable insulating boards in a spaced relationship, a plurality of pairs of movable contacts supported on opposite sides of said movable insulating boards, said support means comprising a plurality of separate generally U-shaped insulating supports between said movable insulating boards in a spaced relationship, upon movement of said movable secondary contact structure from a disconnected position to a test position each of said pairs of movable contacts engaging the outer sides of a separate pair of said stationary contacts and said U-shaped insulating supports moving between adjacent stationary contacts to guide said movable contacts into aligned engagement with said stationary contacts.