A release mechanism for opening a valve of a fire extinguishing installation by means of a linearly movable release element, such as a release plunger or release pin upon releasing a pre-stressed helical spring. At one end of the helical spring there is arranged a movable ball pressure plate. Between this ball pressure plate and a further fixedly arranged ball plate there are arranged balls or spherical elements. A loading pin provided at the movable ball pressure plate retains the helical spring under torsional stress and the movable ball pressure plate in such an angular position that the balls of both ball pressure plates can be retained at a starting distance. Upon electromagnetic release of the loading pin and return rotation of the helical spring the movable ball pressure plate rotates such that the spring can be axially relaxed or load-relieved and the release plunger or the like presses upon the release element of the valve and opens the latter. Concentrically arranged with respect to the helical spring is a further release element which can be manually actuated by a manually operated-release or actuator member, such as a release knob, independent of the electromagnetic release operation. The operating state of the release mechanism can be monitored visually and by microswitches.

Release mechanism for a valve of a fire extinguishing installation

Operating mechanism for actuating an operating rod (13) of a circuit-breaker including at least one interrupter chamber filled with a pressurized dielectric gas, said operating mechanism using a tripping spring (21) held charged when the circuit-breaker is closed by a selectively operable tripping abutment (23). The operating mechanism has a resetting member formed by a member (34) moving through a wall of a sealed and closed enclosure (32) communicating with the pressurized interrupter chamber.

Operating mechanism for high-voltage circuit-breakers

A hydraulic or pneumatic drive for actuation of a movable switch contact of a medium and/or high-voltage power switch, especially an SF6-gas-insulated high-voltage power switch, includes a drive piston coupled to the movable switch contact. Fluid is delivered under pressure to the drive piston from a fluid reservoir configuration in order to perform one switching cycle having a given number of required switching operations. The fluid reservoir configuration has the given number of mutually separate independently acting storage chambers each having an energy content sufficient for a required switching operation.

Hydraulic or pneumatic drive for actuating the movable switch contact of a medium and/or high-voltage power switch

The invention relates to a control device for a circuit breaker. The circuit breaker is controlled mechanically by an engagement spring (8), by a disengagement spring (2), and by a hydraulic transmission for transmitting a portion of the energy in the engagement spring to the disengagement spring. The device has circular symmetry about a longitudinal axis.

Control device for controlling a circuit breaker

Ein hydraulischer oder pneumatischer Antrieb zur 
Betatigung des beweglichen Schaltkontaktes (16) ei­
nes Mittel- und/oder Hochspannungs-Leistungsschal­
ters (11) besitzt eine Fluidspeicheranordnung, aus 
der unter Druck stehendes Fluid einem mit dem beweg­
lichen Schaltkontakt gekuppelten Antriebskolben (14) 
zwecks Durchfuhrung eines Schaltzyklus mit minde­
stens zwei Schalthandlungen zugefuhrt wird. Bei be­
kannten Antrieben ist die Fluispeicheranordnung so 
ausgebildet, das eine Fullmenge fur mehrere Schalt­
handlungen verwendet werden kann. Dies bedingt eine 
Uberdimensionierung. Zur Erzielung einer Verkleinerung der Fluidspeicher­
einrichtung besitzt diese der Anzahl der erforderli­
chen Schalthandlungen (z.B. Aus-, Ein-, Aus-Schalt­
zyklus) entsprechende, jeweils fur sich wirkende, 
voneinander getrennte Speicherraume (50), deren En­
ergieinhalt so bemessen ist, das er fur die jeweils 
erforderliche Schalthandlung ausreicht. Der Antrieb findet insbesondere Anwendung bei SF₆-­
gasisolierten Hochspannungsleistungsschaltern.

Hydraulischer oder pneumatischer Antrieb zur Betätigung des beweglichen Schaltkontaktes eines Mittel- und/oder Hochspannungs-Leistungsschalters

Springloaded drive mechanism for an electrical switch-gear has a switch-on spring which when operated will also compress the tripping spring. When this spring is loaded it will operate independently of the state of the switch-on spring. The switch-on and switch-off springs are each actuated by a piston in an hydraulic cylinder. The chambers of the cylinders are interconnected by a linkage system with a control valve. The control valve has a three way connection with an actuator rod linking it to the motion of the piston via a hydraulic suction-pressure pump. The pump is controlled by linkages from the switch on spring.

Spring loaded drive for switchgear with independent tripping system - has piston operated switch-on and switch-off springs

Mechanische verklinkungseinrichtung fuer federkraftspeicher

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Spring loaded drive for switchgear with independent tripping system - has piston operated switch-on and switch-off springs

Mechanische verklinkungseinrichtung fuer federkraftspeicher