| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 09/25/1991 | EP0448481A1 Operating mechanism for a switch with three positions |
| 09/24/1991 | CA1289607C Draw-in and draw-out mechanism of an electrical circuit breaker with main and auxiliary circuits |
| 09/24/1991 | CA1289606C Puffer type electrical circuit breaker having a high dielectric withstand |
| 09/24/1991 | CA1289605C Electrical circuit breaker with improved dielectric withstand |
| 09/24/1991 | CA1289604C Electrical arc interruption chamber, in particular for fluid-quenched circuit breakers |
| 09/24/1991 | CA1289603C Electric arc breaker having a transverse blower |
| 09/19/1991 | DE4114636A1 Contact system for vacuum circuit breaker - has pair of switching members on relatively movable current bolts |
| 09/19/1991 | DE4008623A1 Metal encapsulated electric switchgear - has circuit breaker with switching drive mechanically linked to load-separating switch |
| 09/18/1991 | CN2085091U Oil-free switch for capaitor group |
| 09/18/1991 | CN1014011B Arrangement for gas insulating switch |
| 09/17/1991 | CA1289178C Three phase vacuum switch operating mechanism with anti-bounce device for interrupter contacts |
| 09/17/1991 | CA1289172C Vacuum interrupter |
| 09/05/1991 | DE4006453A1 Electrical vacuum switching tube - has actuator mechanism with electrical power transmitted to spindle via spring contact element |
| 09/05/1991 | DE4006452A1 Vacuum switch-gear mechanism for 12KV and 24KV operation - uses single interchangeable link to provide requisite motion and spring compression |
| 09/04/1991 | EP0444622A2 Circuit breaker with detachable tripping tester |
| 09/04/1991 | EP0444568A1 Circuit breaker assisted by varistor |
| 09/04/1991 | EP0444345A2 Switch for electrical distribution |
| 09/03/1991 | US5045652 Disconnector of gas insulated switchgear |
| 09/03/1991 | US5045651 Switch |
| 09/03/1991 | US5045281 Silver and/or copper electroconductive component and arc-proof component selected from certain metals, their carbides or borides |
| 08/28/1991 | EP0443236A1 Axial magnetic field vacuum interrupter |
| 08/24/1991 | WO1991013452A1 Quick-action circuit breaker |
| 08/22/1991 | DE4005532A1 Generator load switch for power plant - uses standard vacuum breaker switches controlled via zero transition relay |
| 08/21/1991 | EP0442409A1 DC-contactor for high power |
| 08/14/1991 | EP0441292A1 Medium high voltage self-blowing circuit breaker |
| 08/13/1991 | US5039831 Circuit breaker |
| 08/08/1991 | DE4003332A1 Arc-quenching load switch for gas-insulated switchgear - reduces arc duration and contact erosion through buffering by vacuum at closure and compression at opening |
| 08/08/1991 | DE4002934A1 Vacuum switch contact arrangement - has contact blades attached to vertically-operated contact bolt, gripping flat vertical part of fixed conductor rail |
| 08/08/1991 | DE4002933A1 Vacuum switch chamber assembly |
| 08/07/1991 | EP0439820A2 Vacuumswitch |
| 08/06/1991 | US5038082 Vacuum switch apparatus |
| 08/01/1991 | DE4109190A1 Vacuum switch contact arrangement for deterministic arc switching - has current paths at rims of discs with components directed radially towards axis of contact carriers |
| 07/31/1991 | EP0438793A2 Switch device |
| 07/30/1991 | CA2034464A1 Current limiting circuit breaker compact arc chute configuration |
| 07/30/1991 | CA1287040C Differential hydraulic jack with damping system for the control of electric circuit-breakers |
| 07/24/1991 | EP0437838A1 Reactance circuit breaker for low excess voltage |
| 07/24/1991 | CN2081566U Hanging high-voltage vacuum circuit breaker in room |
| 07/17/1991 | EP0436951A2 Gas circuit breaker |
| 07/17/1991 | CN2081146U 高压真空接触器 High-voltage vacuum contactors |
| 07/10/1991 | EP0436256A2 Switchgear with a gas-filled container and multi-position rotary switch |
| 07/10/1991 | EP0435865A1 Load-break switch containing a vacuum switch tube and process for operating saidload said load-break switch. |
| 07/03/1991 | EP0434893A2 Abnormality detecting device |
| 07/03/1991 | CN2080224U Outdoor high voltage drop off load switch |
| 07/02/1991 | CA2018340A1 Axial magnetic field interrupter |
| 06/29/1991 | CA2013284A1 Fluid insulated vacuum interrupter circuit breaker and operating mechanisms therefor |
| 06/29/1991 | CA2013278A1 Multiple vacuum interrupter fluid insulated circuit breaker with isolation gap |
| 06/27/1991 | WO1991009409A1 Process for producing a surface-coated component, especially a contact member for a vacuum switch, and device for implementing the process |
| 06/27/1991 | DE3942489A1 Gas-blow-out switch - optimises blow-out by using arrester to release 2nd bottom walling of compression space to allow movement and closure of non-return valve |
| 06/26/1991 | EP0434100A2 Gas blast switch |
| 06/20/1991 | DE3941388A1 Active electric switch - has contact pin connected to cooler to ward off heat from operating current |
| 06/19/1991 | EP0433184A1 Hybrid-medium high voltage circuit breaker |
| 06/19/1991 | EP0433183A1 Three-pole gasinsulated high tension circuit breaker |
| 06/19/1991 | CN1052393A High tension dc. current-limiting circuit breaker |
| 06/18/1991 | US5025120 Insert for a hydro pole switch |
| 06/18/1991 | US5025118 Metal-clad, compressed gas-blast circuit-breaker with a shifting linkage |
| 06/12/1991 | EP0431510A1 Limiting high tension direct-current circuit breaker |
| 06/12/1991 | EP0431306A1 Overvoltage limiting circuit breaker |
| 06/12/1991 | CN1052215A Gas-blast load-break switch |
| 06/12/1991 | CN1012863B Operation mechanism for electric circuit breaker |
| 06/11/1991 | US5023415 Distribution system |
| 06/09/1991 | CA2031832A1 High voltage, d.c. limiting circuit breaker |
| 06/06/1991 | WO1991008579A1 Arc spinner interrupter |
| 06/06/1991 | CA2070652A1 Arc spinner interrupter |
| 06/05/1991 | EP0430189A2 Gas-blast load-break switch |
| 06/05/1991 | EP0430123A1 High-tension switch with variators |
| 06/05/1991 | EP0429489A1 Assemblies of ptc circuit protection devices. |
| 06/05/1991 | EP0375732B1 Locking device for switchgear with electromagnetic drive |
| 06/04/1991 | US5021615 On/off loadbreak switch |
| 05/28/1991 | US5019156 Sintered electric contact material for vacuum switch tube and process for manufacturing the same |
| 05/22/1991 | EP0428138A2 Direct current switching apparatus |
| 05/18/1991 | WO1991007768A1 Isolator switch for metal-clad, compressed-gas-insulated high-voltage switchgear |
| 05/18/1991 | CA2068866A1 Isolator switch for metal-clad, compressed-gas-insulated high-voltage switch-gear |
| 05/16/1991 | WO1991006996A1 Three-pole, metal encased, pressurised-gas-insulated high-voltage switchgear |
| 05/16/1991 | CA2072872A1 Three-pole, metal encased, pressurised-gas-insulated high-voltage switchgear |
| 05/15/1991 | CN2077156U High-pressure oil switch tank top protecting cover |
| 05/15/1991 | CN1051454A Surge-limiting circuit breaker |
| 05/14/1991 | US5015810 Arc spinner interrupter |
| 05/14/1991 | US5015809 Vacuum switch arrangement |
| 05/08/1991 | EP0426490A2 Vacuum switch contact material and method of manufacturing it |
| 05/08/1991 | DE3936420A1 Screened contact for transformer tap switch - has screen held on shaft by recessed spring plate, insertable over contact end |
| 05/08/1991 | CN2076707U High-voltage vacuum breaker for mine |
| 05/07/1991 | US5014025 Actuator-accessory reset arrangement for molded case circuit interrupter or electric switch |
| 04/30/1991 | US5012053 Contact device for a switch |
| 04/30/1991 | US5012051 Three-phase common container-type circuit breaker |
| 04/24/1991 | EP0424281A1 Operating device for a high-voltage multipole circuit breaker |
| 04/24/1991 | CN2075822U Mine kilovolt big current air isoltor |
| 04/24/1991 | CN1050944A Switchgear having breaking point operable in insulating gas |
| 04/23/1991 | CA1283435C Alignment and centering arrangement for contacts of an interrupting device |
| 04/16/1991 | CA1283152C Disconnect switch for a metal-clad, gas-insulated high-voltage switching station |
| 04/16/1991 | CA1283151C Vacuum interrupter |
| 04/11/1991 | DE3933535A1 Gas-insulated metal-clad switchgear installation - has plug connection to feedthrough leading to pivot of lever which moves contact reversibly between bus-bar and earthing point |
| 04/10/1991 | EP0421892A1 Circuit breaker with an electronic release |
| 04/10/1991 | EP0421891A1 Static quick cut out with galvanic disconnection |
| 04/04/1991 | DE4019686A1 Erdungsschalter fuer eine druckgasisolierte, metallgekapselte hochspannungsschaltanlage Earthing switch for a compressed-gas-insulated, metal high voltage switchgear |
| 04/04/1991 | DE3932159A1 Vacuum switch chamber for HV switch - has spring steel elements projecting from ring fitted to central section of condensation screen |
| 04/03/1991 | EP0420609A2 On/off loadbreak switch |
| 04/03/1991 | EP0419940A2 Method of manufacture of a housing for a vacuum switch |
| 04/03/1991 | EP0419468A1 High-tension switchgear with metal casing and compressed gas insulation and with an insulated earthing switch. |
| 04/02/1991 | US5004877 Vacuum interrupter |
| 04/02/1991 | US5004874 Direct current switching apparatus |