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7528332 |
High speed actuating device and circuit breaker
A device for rapidly moving mechanically actuated devices, such as switches and valves with the capability of sub-millisecond response times being achievable with moving masses exceeding one...
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7334319 |
Method for opening the contact gap of a vacuum interrupter
The aim of the invention is to improve the breaking ability of vacuum interrupter in the medium- and high-voltage range. Said aim is achieved whereby the contact pieces which may be displaced...
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7310221 |
Switching installation provided with an electrically insulating barrier
A switching installation ( 5 ) having a circuit breaker ( 12 ), which is connected to a cable connection ( 33 ), and optionally a disconnector ( 14 ) for making or breaking a conductive connection...
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6903295 |
Fluid pressure operating apparatus for circuit breaker
A fluid pressure operating apparatus, comprising: a fluid pressure cylinder for opening and/or closing a contact; control valves for use of open operation and/or closed-circuit, for bringing the...
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6875941 |
Hydraulic operating apparatus for switch
Disclosed is a hydraulic operating apparatus for switch with which it is possible to constantly obtain a stable interrupting performance at the time of high-speed successive operations. Closing and...
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6815629 |
Hydraulic pressure actuating apparatus for circuit breaker
In a hydraulic pressure actuating apparatus for a circuit breaker, contacts of the circuit breaker have a moving contact and a stationary contact for turning on/off current. A shaft, at an end...
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6407908 |
Gas-insulated circuit breaker and gas-insulated switch-gear having the same
In order to provide a good gas-insulated circuit breaker which is compact and easy in assembling and preparation, a gas-insulated circuit breaker 100 is constructed with a grounded enclosure 104...
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5804787 |
Gas circuit breaker and liquid pressure-driving system to be used therefor
For the purpose of providing a gas circuit breaker with a structure of hydraulic pressure operation system capable of detecting the occurrence of an incomplete closed state of the valves therein to...
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5796174 |
Device for controlling breaker in construction vehicles
A device for controlling a breaker in construction vehicles is disclosed. The device includes a control circuit provided with a power supply, a first solenoid valve used for controlling the...
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5760358 |
Hydraulic device for operating a drive piston for a moving component
A hydraulic device for a moving contact piece of a high-voltage power circuit breaker includes a reservoir and a low-pressure tank for hydraulic fluid. A changeover valve has a slide for...
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5750950 |
Hydraulic drive device for circuit breaker and circuit breaker using the same
Occurrence of erroneous operation in which circuit closing operation unexpectedly happens after circuit opening operation even though an abnormality such that a circuit closing system is left in a...
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5534858 |
Poletop switch automation system
A switch automation system which activates poletop power line switches in response to signals received from a remote location. An actuator piston and cylinder assembly is mounted to a power pole in...
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5502290 |
Switch mechanism
A switching mechanism for use e.g. in a circuit breaker of an underground electric substation has a movable rod which causes opening and closing of an electrical contact and a hydraulic operating...
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5296662 |
Electric switching device
An electric switching device according to the invention comprises two fixed contacts and one movable contact, referred to jointly as the main contact system. The main contact system is located in...
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5281781 |
Apparatus for switching a high-current power source
Apparatus for switching a high-current power supply, for example for transportable melting systems in melting and remelting plants, with a stationary apparatus part and a movable apparatus part, a...
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5206470 |
Operating device for gas circuit breaker
An operating device for a gas circuit breaker includes an operating piston reciprocably movable between a first position and a second position, with the operating piston dividing an internal space...
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5187339 |
Gas insulated high-voltage circuit breaker with pneumatic operating mechanism
A high-voltage circuit breaker includes a first compartment with SF6 under pressure having stationary and movable contacts therein, and a second sealed compartment housing having an operating...
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4849650 |
Hydraulic drive for a high-voltage switchgear
A high-voltage switchgear having a fixed and a moving contact member includes a hydraulic drive for operation of the moving contact member having a piston and cylinder configuration with a piston...
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4807514 |
Differential hydraulic jack with damping system for the control of electric circuit-breakers
A differential hydraulic jack with a damping system for the control of electric circuit-breakers is provided with a floating ring which produces a damping action at the end of travel and is also...
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4788391 |
Hydraulic or pneumatic drive for actuating the movable switch contact of a medium and/or high-voltage power switch
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...
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4785712 |
Hydraulic operating apparatus for electric circuit breaker
A hydraulic operating apparatus in which a differential piston is used as a drive unit, and in which the differential piston is driven by applying a high pressure fluid on a large piston face side...
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4730092 |
Hydraulic driving device for an electric pressurized-gas switch
In a hydraulic driving device for an electric pressurized-gas switch, the piston-cylinder systems are responsive to pressure from a hydropneumatic pressure accumulator. The driving device is...
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4716812 |
Hydraulic drive
A hydraulic drive includes a pressure housing having a blind axial recess formed therein with a wall and a bottom, an accumulator piston with first and second opposite ends disposed in the recess,...
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4692577 |
Switch for a high-voltage interrupting module
An energy-absorbing element is provided between an insulative piston and a movable contact of a switch for a high-voltage device. In arrangements where a fusible element is in electrical shunt with...
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4686337 |
Circuit interrupter having a chemical operator with double-acting drive means
A double-acting chemical operator drive assembly having a pair of pistons that are secured to the ends of a single piston rod and cooperate with a pair of power cylinders provide a positive drive...
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4669265 |
Oleopneumatic control system for electric circuit-breakers
The times of response of a circuit-breaker control system to breaker-closing orders are reduced by means of a unit comprising a pressure reducer and a low-capacity compensating hydraulic...
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4641000 |
Actuator for electrical circuit interrupter using nitrocellulose type solid propellant
An actuator for an electrical circuit interrupter has a power cylinder for operating the circuit interrupter from a high pressure gas flow provided by a gas generating power unit which is a shotgun...
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RE32321 |
Electric switch and improved device using same
A high speed switch usable at high voltage includes a pair of contacts movable apart along a fixed line. When the contacts are normally interconnected, at least one of them contributes to the...
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4623134 |
Hydraulic accumulator for providing pressurized fluid
A hydraulic accumulator for providing pressurized fluid for a hydraulic system, includes a cylinder, a piston movably disposed in the cylinder defining a space in the cylinder on one side of the...
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4617436 |
Actuator for an electrical circuit interrupter
An actuator for an electrical circuit interrupter utilizes a gas generating chemical charge which is carried in its own cylindrical operating chamber. These power units are stored in a magazine and...
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4581510 |
Drive for a high-tension circuit breaker
An electrical high-tension circuit breaker with main contacts and auxiliary contacts in parallel to the main contacts. Both sets of contacts are actuated by hydraulic drives which are fed from a...
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4580020 |
Dynamic seal for gas generator chamber
In an electric circuit interrupter actuator which utilizes gas generator chambers to activate a power cylinder to provide opening and closing of the interrupter, an improved dynamic seal is...
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4563556 |
Internal combustion circuit breaker
An internal combustion electrical circuit breaker comprising at least one: (a) insulating cylinder; (b) pair of electrical conductors penetrating the cylinder approximately perpendicular to its...
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4535208 |
Actuating device for a high-voltage switch
At least one actuating or cut-off spring is provided which is compressed in the cut-on or closed position of the switch and is coupled to an actuating linkage or rod leading to movable contacts of...
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4531031 |
Pneumatic operating mechanism for a circuit breaker
Power circuit breaker apparatus having a novel trip valve on the pneumatic operating mechanism for reducing air consumption of the pneumatic breaker operating mechanism. The novel trip valve...
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4510356 |
Liquid metal switch apparatus
A movable high amperage electrical switching buggy which is adapted for use in a corrosive atmosphere includes a wheeled chassis and spaced apart first and second electrical terminals housed on the...
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4494103 |
High-speed, multi-break electrical switch
An electrical switch includes an alternating series of first and second switch cells. Each first cell includes a first conductive member with a first bore and a first insulative member conformally...
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4461937 |
Fail-safe hydraulically operated circuit breaker accumulator arrangement
A contact operating mechanism is disclosed which employs a hydraulic motor means for moving contact members between closed and tripped positions, an accumulator for supplying hydraulic fluid under...
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4457383 |
High temperature selective fire perforating gun and switch therefor
A multiple shot selective fire perforating gun is provided for piercing oil field tubular goods, typically during the process of completing an oil or gas well. The perforating gun includes a...
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4451717 |
Circuit interrupter operating mechanism having a chemical operator with stationary combustion chambers
An electric circuit interrupter comprising a pair of separable contacts, an operating mechanism for opening and closing the contacts and a drive mechanism including a cylinder-piston assembly and a...
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4389554 |
Transformer protective switch
An electric switch includes a pair of separable contacts operable between open and closed positions with respect to each other. An operator shaft is utilized for moving one of the contacts, and the...
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4384182 |
Hydraulic actuator for an electric circuit breaker
This actuator comprises a fluid motor having a piston, a breaker-opening space at one side of the piston, and a breaker-closing space at its opposite side. An accumulator freely communicates with...
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4358648 |
Power circuit breaker with opening and closing mechanisms
A circuit breaker characterized by a pair of separable contacts, operating means for opening the contacts and comprising a cylinder and piston mechanism, closing means for closing the contacts and...
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4348565 |
Interchangeable chemically operated circuit breaker
A circuit interrupter includes a pair of separable contacts, an operating mechanism for causing separation of the contacts, and a drive mechanism for causing movement of the operating mechanism....
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4342978 |
Explosively-actuated switch and current limiting, high voltage fuse using same
A high speed high voltage electrical switch opens a current path in which the switch is included. The switch includes first and second normally electrically interconnected contacts which normally...
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4321435 |
Fluid actuating device for an electric circuit breaker
An improved fluid actuating device for an electric switching apparatus such as a high-voltage power circuit breaker or the like includes an actuator for actuating the electric switching apparatus....
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4306263 |
Synchronous closing system and latch therefor
A synchronous closing system for high voltage circuit breakers is disclosed wherein the circuit breaker main contacts close within about 1 millisecond of a current zero in the current through a...
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4271341 |
Circuit breaker operating mechanism
A circuit interrupter characterized by a pair of separable contacts, operating means for opening and closing the contacts and comprising a piston for opening the contacts, the piston being...
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4251701 |
Circuit interrupter
A circuit interrupter characterized by a pair of separable contacts with operating means for opening and closing the contacts and comprising a cylinder and piston mechanism which cylinder has...
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4166937 |
Hydraulically-activated operating system for an electric circuit breaker
This operating system comprises a fluid motor having a piston, a breaker-opening space at one side of the piston, and a breaker-closing space at its opposite side. An accumulator freely...
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