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US 3,958,156 AGranted
Vacuum interrupter metal-clad switchgear vertically elevatable within compartment
AssigneeAllis-Chalmers Corporation
InventorJohn O. Tjebben
Life of this patent
Estimating the term…
Abstract
A drawout switchgear having an in-line vacuum circuit breaker carried on a truck which is insertable into a compartment of the switchgear; the truck carrying the breaker is inserted into the compartment and the truck and breaker as a unit is elevated into the connected position; in connected position each vacuum interrupter is enclosed in its own stationary porcelain housing which also contains the primary disconnects that feed vertically directly to the main horizontal bus and up through long porcelain insulators to outgoing compartments at the rear of circuit breaker compartment.
Claims23
Enclosed switchgear including an enclosure defining a three phase circuit breaker compartment having a longitudinal axis;
- a plurality of main bus conductors and a plurality of load bus conductors extending into said three phase circuit breaker compartment, said bus conductors being positioned vertically and arranged in a horizontal line;
- a three phase circuit breaker having a longitudinal axis, said circuit breaker being movable into and out of said circuit breaker compartment in a direction parallel to its longitudinal axis, said circuit breaker being provided with a plurality of vacuum interrupters arranged vertically in a single horizontal line parallel to the longitudinal axis of said circuit breaker, one for each associated bus conductor;
- means on each vacuum interrupter for establishing an electrical connection between said vacuum interrupter and an associated bus conductor;
- and,
- means operable to move said three phase circuit breaker vertically bodily within said circuit breaker compartment to effect engagement of said means on each of said vacuum interrupters with associated ones of said bus conductors to establish electrical engagement therebetween.
2 more elements
Enclosed switchgear including an enclosure defining a three phase circuit breaker compartment;
- a plurality of main bus conductors and a plurality of load bus conductors extending into said circuit breaker compartment, said bus conductors being arranged vertically in a line and entering said compartment from the top thereof;
- a three phase circuit breaker having a plurality of vacuum interrupters arranged vertically in a line, one for each associated bus conductor, said circuit breaker including a frame having wheel means for guideable movement of said circuit breaker;
- a ball screw and nut drive operably connected to elevate said circuit breaker bodily within said circuit breaker compartment to effect engagement of said vacuum interrupters with associated ones of said bus conductors to establish electrical engagement therebetween;
- an operator connected to effect opening and closing of said vacuum interrupters, said operator including trip-free linkage operable when actuated to effect the closing of said vacuum interrupters;
- said operator having stored energy means operable when released by the operation of said trip-free linkage in a vacuum interrupter closing operation;
- a vacuum interrupter opening interlock means comprising a bar member movably carried by said circuit breaker and normally biased into a position to interfere with the full entry of said circuit breaker into said circuit breaker compartment;
- a movable trip means operable when actuated to trip said trip-free linkage for opening said vacuum interrupters, said trip means being carried by said circuit in position to be actuated by the movement of said interlock bar to a noninterfering position;
- operable means carried by said circuit breaker to restore said trip means to its normal position when said interlock bar is biased to its normal position;
- an interlock rod carried by said circuit breaker for axial movement into and out of engagement with said interlock bar member;
- and,
- means operatively connected to said interlock rod to bias said rod into a position of engagement with said trip means when said interlock bar member has been moved to a noninterfering position to thereby insure that said movable trip means is actuated to trip said trip-free linkage and maintained in such position so that said vacuum interrupters are maintained opened as said ball screw and nut drive operates to elevate said circuit breaker into connected position.
8 more elements
Enclosed switchgear having a compartment adapted to receive a circuit breaker provided with a plurality of vacuum interrupters having open and closed positions, said circuit breaker also having a vacuum interrupter operator connected to effect the opening and closing of said vacuum interrupters;
- a set of ganged secondary auxiliary switches disposed within said compartment, said set of ganged secondary switches being constructed and arranged to be operated by a common actuator;
- and,
- mechanical means operably connected between said vacuum interrupter operator and said common actuator of said ganged secondary set of auxiliary switches for actuating said common actuator when said vacuum interrupter operator opens or closes said vacuum interrupters.
Enclosed switchgear including an enclosure defining a plurality of vertically tiered compartments;
- a first of said tiered compartments being adapted to receive a three-phase circuit breaker;
- a second of said tiered compartments above said circuit breaker compartment;
- a plurality of relatively long insulators supported by said second of said tiered compartments and extending in opposite directions therefrom;
- a plurality of main bus conductors, one for each phase entering into said second compartment through associated ones of said insulators and extending downwardly therefrom into said circuit breaker compartment;
- a third of said tiered compartments above said second compartment;
- a plurality of main load bus conductors, one for each phase extending through associated ones of said insulators from said third compartment through said second compartment into said circuit breaker compartment;
- at least one toroidal current transformer encompassing each of said insulators and supported by said second of said tiered compartments;
- a circuit breaker having a plurality of vacuum interrupters, one for each bus conductor, said vacuum interrupters being connectable with said bus conductors;
- and,
- operating means operable to elevate said circuit breaker within said circuit breaker compartment to connect said vacuum interrupters with associated ones of said bus conductors.
7 more elements
Dependencies are inferred from the claim text.