| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 03/28/1991 | WO1991005356A1 Earthing switch for a metal-encapsulated high-voltage switchboard plant insulated by pressurised gas |
| 03/27/1991 | EP0418786A2 Circuit breaker |
| 03/27/1991 | CN1050287A Medium-voltage gas circuit-breaker |
| 03/27/1991 | CN1050286A Medium tension circuit breaking having high nominal current |
| 03/26/1991 | US5003427 Metal encapsulated multi-phase high voltage switching system filled with compressed gas |
| 03/26/1991 | US5003138 Gas-blast |
| 03/21/1991 | DE3930550A1 Switching chamber for sulphur hexa:fluoride circuit breaker - has rated current contact in region of breaker axis, surrounded by power contact |
| 03/21/1991 | DE3930548A1 Circuit breaker with automatic light atrc quenching - has compression plunger held by force-dependent releasable, stationary arrester |
| 03/20/1991 | EP0417813A2 Switchgear having a breaking point operable in an insulating gas |
| 03/20/1991 | EP0417218A1 A line terminal and arc stack for a circuit breaker |
| 03/19/1991 | US5001599 Gas-insulated switchgear apparatus |
| 03/19/1991 | US5001314 High tension circuit-breaker having a dielectric gas under pressure |
| 03/19/1991 | US5001313 Rotating arc circuit breaker with centrifugal extinguishing gas effect |
| 03/19/1991 | US5001312 High current repetitive switch having no significant arcing |
| 03/14/1991 | CA2024645A1 Ultra high-speed circuit breaker with galvanic isolation |
| 03/14/1991 | CA2024644A1 Circuit breaker comprising an electronic trip device |
| 03/13/1991 | EP0417015A1 Control mechanism of a high tension multipolar switch |
| 03/13/1991 | EP0416510A2 DC power supply circuit arrangement |
| 03/12/1991 | US4999463 High voltage interrupter |
| 03/08/1991 | CA2024198A1 Operating mechanism of a high-voltage multipole switch |
| 03/06/1991 | EP0415098A1 Self-blast circuit breaker for medium voltage |
| 03/06/1991 | CN1049749A Dc high-speed vacuum circuit breaker and electric motor vehicle equipped with this circuit breaker |
| 03/06/1991 | CN1049748A 断路器 Breaker |
| 03/05/1991 | US4997624 Contact material for vacuum switches and process for manufacturing same |
| 02/27/1991 | EP0414192A2 Disconnecting switch |
| 02/27/1991 | CN2072273U Double-action vacuum contactor |
| 02/27/1991 | CN2072272U Fast telescopic aerogenesis differential pressure type arc-extinguishing tube |
| 02/26/1991 | US4996399 High or medium tension circuit breaker |
| 02/26/1991 | US4996398 Medium tension circuit breaking having high nominal current |
| 02/26/1991 | US4996397 Spring-force drive for a power switch |
| 02/25/1991 | US5091615 Vacuum switch |
| 02/20/1991 | CN1049425A Medium tension circuit breaker |
| 02/13/1991 | EP0412479A1 Medium voltage switch |
| 02/13/1991 | EP0412478A1 Generator load break switch |
| 02/13/1991 | EP0412095A1 Short-circuiting switch and electromagnetic projectile launcher incorporating the switch |
| 02/13/1991 | CN2071383U Low voltage double motion electrode vacuum arc-suppression room |
| 02/13/1991 | CN2071377U Automatic interlocking controlling device for anti-wrongly operation of high voltage switch apparatus |
| 02/12/1991 | US4992634 Dielectric |
| 02/12/1991 | US4992633 Contained pressure activated switch |
| 02/12/1991 | CA1280141C Control device of a high voltage circuit breaker equipped with closing resistors |
| 02/06/1991 | EP0411663A2 DC High-speed vacuum circuit breaker and electric motor vehicle equipped with this circuit breaker |
| 02/06/1991 | EP0411492A2 High voltage vacuum insulating container |
| 02/06/1991 | EP0155322B1 Electrode of vacuum breaker |
| 02/06/1991 | CN2070949U Operating mechanism of explosion type hv breaker |
| 01/31/1991 | DE3924909A1 Verfahren zum betrieb eines elektrischen leistungsschalters Method for operating an electrical circuit breaker |
| 01/30/1991 | EP0410049A1 Contact arrangement for a vacuum interrupter |
| 01/30/1991 | CN1011450B Kinematic tranmission system between the operating mechanism and poles of a moulded insulating case electrical circuit breaker |
| 01/29/1991 | CA1279686C Group operated circuit disconnect apparatus for overhead electric power lines |
| 01/23/1991 | EP0409047A2 Method of manufacturing a vacuum interrupter chamber |
| 01/22/1991 | CA1279355C Isolating switch of a high voltage metalclad installation |
| 01/16/1991 | CN1048634A Apparatus for gas insulating switch |
| 01/16/1991 | CN1048628A High or medium tension circuit breaker |
| 01/10/1991 | DE4027723A1 Vacuum switch chamber for load=shedding switchgear - has closure applying atmos. pressure to sensitive region of bellows when auxiliary switching piece releases fixing |
| 01/10/1991 | DE3920784A1 Vacuum switch coaxial contact arrangement for arc extinction - relies for anode spot inhibition upon unequal anode and cathode contact potential differences w.r.t. anode centre |
| 01/09/1991 | EP0406944A1 Process for fixing a metal screen in the housing of a vacuum switch, screen therefor, and vacuum switch provided with such a screen |
| 01/09/1991 | EP0406794A1 High or middle tension circuit breaker |
| 01/09/1991 | CN2069166U Operating mechanism for sectioning device |
| 01/09/1991 | CN1048464A Gas breaker |
| 01/08/1991 | US4984131 Cryogenic inductor |
| 01/08/1991 | US4983793 Switch chamber for a vacuum switch |
| 01/08/1991 | US4983792 Interrupter switch with selective circuit-isolating feature |
| 01/08/1991 | US4983791 High tension circuit breaker having a dielectric blast gas |
| 01/08/1991 | US4983789 High- and medium-voltage gas circuit breakers |
| 01/03/1991 | DE4017643A1 Pressurised gas switch with light arc contacts - uses cylinder attached to movable gas blast contact and cooperating spring-biassed piston |
| 01/02/1991 | EP0405410A2 Gas circuit breaker |
| 01/02/1991 | EP0405253A1 Three phase gas insulated switchgear |
| 01/01/1991 | US4982059 Axial magnetic field interrupter |
| 12/27/1990 | CA1278328C Spring operating mechanism for a circuit interrupter |
| 12/25/1990 | US4980528 Arc interrupter |
| 12/25/1990 | US4980527 Arc spinner interrupter |
| 12/19/1990 | CN2067859U Special metal expander for low-oil-content circuit-breaker |
| 12/19/1990 | CN1010903B Latch mechanism for fast-action circuit-breaker |
| 12/18/1990 | US4978815 Load selector for step transformers |
| 12/13/1990 | WO1990015429A1 Compressed gas switch |
| 12/13/1990 | WO1990015425A1 PROCESS FOR PRODUCING A CuCr CONTACT MATERIAL FOR VACUUM SWITCHES AND APPROPRIATE CONTACT MATERIAL |
| 12/13/1990 | WO1990015424A1 PROCESS FOR PRODUCING A CuCr CONTACT MATERIAL FOR VACUUM SWTICHEs AND APPROPRIATE CONTACT MATERIAL |
| 12/12/1990 | EP0401595A2 Sintered electric contact material for vacuum switch tube and process for manufacturing the same |
| 12/12/1990 | CN1047756A Rotating arc electrical switch |
| 12/05/1990 | EP0401131A1 Electrical switch with rotating arc |
| 12/05/1990 | EP0400523A1 High tension gas blast circuit-breaker |
| 12/05/1990 | EP0400442A2 Contact piece for electrical switching device |
| 12/04/1990 | US4975673 Circuit breaker apparatus including trip display mechanism |
| 12/04/1990 | US4975553 Line terminal and arc stack for a circuit breaker |
| 12/04/1990 | US4975552 Vacuum switch |
| 12/04/1990 | US4975551 Arc-extinguishing composition and articles manufactured therefrom |
| 11/30/1990 | CA2016980A1 Rotating arc electrical switch |
| 11/29/1990 | DE4014768A1 Axial magnetic field switch for vacuum switchgear - has windings outside vacuum space attached to contact and electrode carriers on ends of fixed and sliding members |
| 11/29/1990 | DE4014763A1 Axial magnetic field switch for vacuum switchgear - has relatively movable winging with flexible connections between stationary quad. conductors on tube end and slots in member |
| 11/27/1990 | US4973806 Compressed-air breaker |
| 11/27/1990 | US4973803 Vacuum circuit breaker |
| 11/22/1990 | EP0398213A1 Middle high-voltage circuit breaker for high nominal current |
| 11/22/1990 | EP0398211A1 High tension gas blast circuit breaker |
| 11/22/1990 | EP0398116A1 Medium high voltage self-blowing circuit breaker |
| 11/22/1990 | DE4014906A1 Vacuum switch chamber for HV switch - has current bolt enclosed by high magnetic permeability elements |
| 11/22/1990 | DE4013903A1 Magnetic field contact set for vacuum switch - has ring section for each contact with extension providing contact zone |
| 11/22/1990 | DE3916450A1 Externally threaded plastomer component for HV switch - has annular slot receiving threaded metal ring with dovetail width |
| 11/22/1990 | DE3915700A1 Gas-blast HV circuit breaker - has gas released in extinction gas storage space for enhancing arc extinction characteristics |
| 11/21/1990 | CN1047165A Housings with safety pressure relief means thereon |
| 11/20/1990 | US4972055 Multiple vacuum interrupter fluid insulated circuit breaker with isolation gap |
| 11/20/1990 | US4971866 Vacuum switch contact materials and the manufacturing methods |