Abstract: A high voltage vertical break disconnect switch with a planetary gear reduction drive assembly including at least one stage operatively attached to a perpendicular rotatable insulator of the high voltage vertical break disconnect switch. The planetary gear reduction drive assembly includes a lower crankshaft part and a cooperating upper crankshaft part. The lower crankshaft part is solidly connected to the perpendicular rotatable insulator. The planetary gear reduction drive assembly includes an output that drives the upper crankshaft part. The upper crankshaft part drives a movable link assembly that causes a switch blade of the vertical break switch to open and close.

Abstract: A high voltage vertical break disconnect switch with a planetary gear reduction drive assembly including at least one stage operatively attached to a perpendicular rotatable insulator of the high voltage vertical break disconnect switch. The planetary gear reduction drive assembly includes a lower crankshaft part and a cooperating upper crankshaft part. The lower crankshaft part is solidly connected to the perpendicular rotatable insulator. The planetary gear reduction drive assembly includes an output that drives the upper crankshaft part. The upper crankshaft part drives a movable link assembly that causes a switch blade of the vertical break switch to open and close.

Abstract: A vacuum interrupter for a high voltage air break switch is disclosed. The interrupter has a plurality of load interrupter contacts enclosed in axially aligned vacuum bottles, each bottle containing a fixed contact and a second contact movable axially away from the fixed contact to open position and toward the fixed contact to closed position. The bottles are positioned in an tubular housing of dielectric material having a top end member and a bottom end member. The vacuum bottles are mechanically coupled to one another in a stack with the top bottle supported by the top end member. At least one air permeable hydrophobic vent member is operatively disposed in the top end member and/or bottom end member and/or tubular housing to prevent condensation in the housing. The stack of vacuum bottles are axially supported at the bottom by a cushion spring assembly keeping the bottles in compression to prevent tension loads on the braze joints of the bottles.

Abstract: A circuit breaker includes a plurality of pole assemblies, each having a movable contact and a stationary contact. A bellcrank assembly is associated with each pole assembly. Each bellcrank assembly includes a bellcrank lever including a cylindrical body and at least one radially extending arm. The radially extending arm is mechanically interrelated with the movable contact so that rotation of the bellcrank lever selectively causes the movable contact to engage or disengage the stationary contact. At least one of the bellcrank lever radially extending arms is relatively more flexible than the other bellcrank lever radially extending arms.

Abstract: A circuit breaker includes a plurality of pole assemblies, each having a movable contact and a stationary contact. A bellcrank assembly is associated with each pole assembly. Each bellcrank assembly includes a bellcrank lever including a cylindrical body and at least one radially extending arm. The radially extending arm is mechanically interrelated with the movable contact so that rotation of the bellcrank lever selectively causes the movable contact to engage or disengage the stationary contact. At least one of the bellcrank lever radially extending arms is relatively more flexible than the other bellcrank lever radially extending arms.

Abstract: Hydraulic valve having a valve body and housing, which has a first, second and third cutout. A hydraulic medium is fed via the first cutout. The hydraulic medium is fed to a pressure consumer via the second cutout and to a pressure sink via the third cutout. The valve body moves to and fro between two end positions. From a second end position, the hydraulic medium passes from the first to the second cutout. In a first end position, the hydraulic medium passes from the second to the third cutout. Owing to the valve body, a constant flow cross section for the hydraulic medium, released by the first cutout, arises during a switching operation from the first into the second end position in a fixed time span, resulting in a maximum flow cross section being achieved when the valve body is in the second end position.