| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 06/26/1990 | US4937698 System for foreseeing deterioration in interrupting performance of vacuum interrupter |
| 06/26/1990 | US4937406 Insulator-type gas circuit interrupter |
| 06/26/1990 | US4937405 Vacuum switch chamber |
| 06/26/1990 | US4937403 Power source switching device |
| 06/20/1990 | EP0373598A2 Hydraulic actuator |
| 06/20/1990 | CN1043221A Circuit breaker drive mechanism |
| 06/20/1990 | CN1043220A 真空开关装置 Vacuum switchgear |
| 06/19/1990 | US4935712 Operation mechanism of a circuit breaker allowing automatic or manual operation |
| 06/19/1990 | US4935590 Gas-blast circuit breaker |
| 06/19/1990 | US4935588 Contact arrangement for vacuum switches with axial magnetic fields |
| 06/13/1990 | EP0372449A1 Operating device for a circuit breaker |
| 06/13/1990 | EP0372349A1 Functional locking cabinet for a medium tension switchgear |
| 06/13/1990 | CN1008415B Gas-blast switch |
| 06/13/1990 | CN1008414B Gaseous cut-out |
| 06/12/1990 | US4933518 Vacuum interrupter |
| 06/07/1990 | DE3840825A1 Contact arrangement for vacuum switches |
| 06/06/1990 | EP0371224A2 Vacuum switch tube |
| 06/06/1990 | CN1042798A Three-phase common container breaker |
| 05/30/1990 | CN2057775U 操动机构 Actuator |
| 05/30/1990 | CN1042625A Arrangement for gas insulating switch |
| 05/30/1990 | CN1042621A 断路器 Breaker |
| 05/30/1990 | CN1008227B Molded case circuit breaker with an improved arc gas external venting system |
| 05/29/1990 | US4929856 Heavy-duty circuit breaker |
| 05/23/1990 | EP0369280A1 Three-phase common container-type circuit breaker |
| 05/23/1990 | EP0368860A1 Contact material for vacuum switches and process for manufacturing same |
| 05/23/1990 | CN1042445A High-tension breaker with pressurized dielectric gas arc-extinguishing |
| 05/22/1990 | US4927989 Contact material for vacuum circuit breaker |
| 05/16/1990 | EP0368249A2 Disconnecting switch |
| 05/15/1990 | US4926019 Moving copper pivot |
| 05/15/1990 | US4926018 Moving mains arc movement loop |
| 05/15/1990 | US4926017 Vacuum breaker |
| 05/15/1990 | US4926016 Moving contact blade barrier |
| 05/15/1990 | US4924750 Electromagnetic launcher with improved current commutating switch performance |
| 05/09/1990 | EP0367072A1 Gas-blast circuit interrupter for highpotential |
| 05/09/1990 | CN1007944B Gas breaker |
| 05/02/1990 | EP0366098A2 Gas detector |
| 05/02/1990 | CN2056788U General indoor high voltage vacuum breaker |
| 05/01/1990 | US4922363 Contactor control system |
| 05/01/1990 | CA1268507A1 Multiple-impact shock-absorbing assembly for circuit interrupter and other apparatus |
| 04/25/1990 | EP0365043A1 Contact material for vacuum circuit breaker |
| 04/25/1990 | EP0365005A2 Process and device to determine the internal pressure of a container |
| 04/25/1990 | CN2056543U Vacuum contactor for mechanical locker mode |
| 04/25/1990 | CN1007769B Metalclad substation subdivided into tight compartments |
| 04/24/1990 | US4920242 Electric high-voltage circuit breaker |
| 04/18/1990 | CN1041476A Circuit breaker with arc gum |
| 04/17/1990 | US4918269 Gas-blast circuit breaker |
| 04/17/1990 | US4918268 Arc-rotating magnetic blast coil for the contact element of an electric switch |
| 04/17/1990 | US4917642 Air-tight ceramic container |
| 04/12/1990 | DE3833157A1 Monostable piezoelectric position encoder (displacement sensor) |
| 04/11/1990 | CN2055987U Indoor high-pressure vacumm circuit breaker |
| 04/11/1990 | CN1041239A High tension circuit breaker including dielectric gas used for blasting |
| 04/10/1990 | US4916422 Apparatus for electrically operating a circuit breaker |
| 04/05/1990 | WO1990003657A1 Vacuum switch tube, load-break switch containing said tube and process for operating said load-break switch |
| 04/05/1990 | WO1990003656A1 Process for operating a power switch |
| 04/05/1990 | DE3833484A1 Drive device for an electrical switching apparatus |
| 03/29/1990 | DE3833166A1 Method for operating a power switch |
| 03/28/1990 | EP0360368A2 Lever and abutting-contact arrangement for low-tension power switches with principal contacts and arcing contacts |
| 03/28/1990 | EP0360367A2 Low-voltage power circuit breaker with a wall portion for diverting the arc gases |
| 03/28/1990 | CN1040886A Bistable magnetic actuator and circuit breaker |
| 03/27/1990 | US4912440 Protective coating on electronic circuit breaker component |
| 03/27/1990 | CA1267210A1 Current limiter |
| 03/21/1990 | EP0359467A2 Circuit breaker with arc gun |
| 03/21/1990 | EP0359224A1 High-tension circuit breaker using a dielectric gas for blasting |
| 03/21/1990 | EP0359125A1 High-tension direct-current circuit breaker |
| 03/21/1990 | EP0359105A1 Current limiter |
| 03/21/1990 | CN1040701A Contact material for vacuum current breaker |
| 03/21/1990 | CN1007281B Gearing for mining machine |
| 03/20/1990 | US4910367 Visible break switch |
| 03/15/1990 | DE3829888A1 Vacuum switching chamber |
| 03/15/1990 | DE3828556C1 Contact arrangement for a vacuum switch |
| 03/14/1990 | EP0358289A2 Moving contact arrangement with a shielding part |
| 03/14/1990 | EP0358288A2 Contact arrangement for a power circuit breaker with auxiliary and main contacts |
| 03/14/1990 | EP0358287A2 Driving element for a multipole low tension electrical power circuit breaker |
| 03/14/1990 | EP0358286A2 Articulated conductive assembly for a contact lever |
| 03/13/1990 | CA1266699A1 Gas-blast switch |
| 03/07/1990 | EP0357449A2 Contact apparatus for superconductive circuit |
| 03/06/1990 | US4906935 Method and equipment for vacuum monitoring in vacuum switching tubes |
| 03/01/1990 | DE3828015A1 Method for monitoring the insulating gas of pressurised-gas-insulated switchgears and control device for implementing this method |
| 02/27/1990 | US4904977 Supersonic expulsion fuse |
| 02/26/1990 | EP0296183A4 Circuit breaker contact assembly. |
| 02/22/1990 | WO1990001788A1 A bistable magnetic actuator and a circuit breaker |
| 02/22/1990 | WO1990001787A1 High-tension switchgear with metal casing and compressed gas insulation and with an insulated earthing switch |
| 02/22/1990 | EP0296181A4 Circuit breaker arc stack assembly. |
| 02/21/1990 | EP0354997A2 Contact forming material for a vacuum interrupter |
| 02/14/1990 | EP0354803A1 A bistable magnetic actuator and a circuit breaker |
| 02/14/1990 | EP0354494A1 Switch gear |
| 02/14/1990 | EP0354445A2 Arc chamber for a vacuum switch |
| 02/14/1990 | CN2052945U High reliable vacuum switch |
| 02/14/1990 | CN2052944U Arc extinguishing room with narrow seam at the foot of lapped insulation steel plate |
| 02/14/1990 | CN1039659A Abnormality diagnosing system and method for high voltage power apparatus |
| 02/13/1990 | US4900882 Rotating arc and expansion circuit breaker |
| 02/13/1990 | CA1265832A1 Operating system for remote electrical equipment |
| 02/07/1990 | EP0354166A1 Gas-insulated high-voltage switchgear with an insulated grounding switch |
| 02/07/1990 | CN1039503A 真空断路器 Vacuum Circuit Breaker |
| 02/07/1990 | CN1006746B Sulphur hexafluoride ciruit breaker usable at very low outside temperature |
| 02/06/1990 | CA1265605A1 Metalclad substation subdivided into tight compartments |
| 02/01/1990 | DE3904253A1 Arc extinguishing arrangement for a short-circuit-current limiting low-voltage switch (circuit breaker) |
| 01/31/1990 | EP0352611A2 Chamber of a vacuum interrupter switching |
| 01/25/1990 | WO1990000825A1 Assemblies of ptc circuit protection devices |
| 01/24/1990 | CN1039144A 断路装置 Disconnect device |