| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 08/08/1989 | CA1258283A1 Contact assembly for low-voltage circuit breakers with a two-arm contact lever |
| 08/02/1989 | EP0326449A1 Electromagnetic trip device with an adjustable trip level |
| 08/02/1989 | CN1034451A Vacuum electric circuit breaker |
| 08/01/1989 | US4853184 Contact material for vacuum interrupter |
| 07/25/1989 | US4851622 Puffer type gas-blast circuit breaker |
| 07/18/1989 | US4849848 Circuit breaker |
| 07/18/1989 | US4849725 Multipolar circuit breaker |
| 07/18/1989 | US4849650 Hydraulic drive for a high-voltage switchgear |
| 07/18/1989 | CA1257634A1 Sulfure hexafluoride high voltage circuit-breaker capable of operating at low outside temperatures |
| 07/18/1989 | CA1257633A2 Load break switch with insulating gas in sealed housing |
| 07/11/1989 | US4847456 Vacuum circuit interrupter with axial magnetic arc transfer mechanism |
| 07/11/1989 | CA1257316A1 Circuit interrupter having improved closing resistor control means |
| 07/04/1989 | CA1256921A1 High voltage gas blast circuit-breaker |
| 07/04/1989 | CA1256920A1 Circuit breaker with sulphur hexafluoride, for use in very cold environments |
| 07/04/1989 | CA1256919A1 Spark screening electrical switch |
| 07/04/1989 | CA1256918A1 Shielded electrical interrupter |
| 07/04/1989 | CA1256911A1 Nozzle and retaining arrangement |
| 06/29/1989 | DE3742459A1 Drive device for an electrical medium-voltage or high-voltage switch |
| 06/29/1989 | DE3739412A1 Hochstromschalter High current switch |
| 06/28/1989 | EP0322388A2 A leak indicator |
| 06/27/1989 | US4843199 Gas-blast circuit breaker |
| 06/27/1989 | US4841834 Command operated liquid metal opening switch |
| 06/27/1989 | US4841833 Rotary switch for multiple shot electromagnetic launchers |
| 06/27/1989 | CA1256476A1 Air-blast circuit breaker and self-injection of its liquefied gas |
| 06/27/1989 | CA1256475A1 Electromagnetically actuated high dc current switch |
| 06/22/1989 | DE3841315A1 Mutual interlocking of a large number of automatic circuit breakers |
| 06/21/1989 | EP0320614A1 Spring energy accumulator drive for a high voltage switch |
| 06/21/1989 | CN2039874U 35 kv multi-oil circuit breaker |
| 06/20/1989 | US4841108 Recloser plenum puffer interrupter |
| 06/15/1989 | DE3840192A1 Switching contact arrangement |
| 06/14/1989 | CN1004529B Gas insulation switch |
| 06/13/1989 | US4839482 Gas-blast breaker |
| 06/13/1989 | US4839481 Vacuum interrupter |
| 06/13/1989 | US4839477 Controller having interchangeable vacuum or air break contactors and having easily serviced parts |
| 06/13/1989 | US4839476 Switch operating mechanism |
| 06/13/1989 | CA1255782A1 Microprocessor controlled circuit breaker trip unit |
| 06/13/1989 | CA1255725A1 Vacuum switch provided with horseshoe-shaped elements for generating an axial magnetic field |
| 06/08/1989 | DE3833564A1 Gas-blast circuit breaker |
| 06/06/1989 | US4836978 Method for making vacuum circuit breaker electrodes |
| 06/06/1989 | CA1255350A1 Chamber for portable assembly of section switch operation |
| 06/06/1989 | CA1255349A1 Load break switch with insulating gas in sealed housing |
| 06/01/1989 | WO1989005044A1 High-current switch |
| 05/31/1989 | CN2038665U Fall down type arc-extinguishing switch |
| 05/30/1989 | US4835648 Gas insulated switchgear |
| 05/24/1989 | CN2038278U Resonance blowout switch |
| 05/18/1989 | WO1989004544A1 Locking device for switchgear with electromagnetic drive |
| 05/17/1989 | EP0316118A2 Electrode for a vacuum breaker |
| 05/17/1989 | EP0315712A1 SF6-gas insulated switchgear with a rotating arc extinguish device |
| 05/16/1989 | US4831487 Reactor switch arc-back limiting circuit |
| 05/16/1989 | US4831220 High-voltage compressed-gas circuit breaker |
| 05/11/1989 | DE3823297A1 Vacuum switch having an external axial magnetic-field excitation device |
| 05/11/1989 | DE3736835A1 High-voltage switch |
| 05/10/1989 | EP0315505A1 Electrical self blast circuit breaker with variable extinguishing chamber volume |
| 05/10/1989 | EP0315199A2 Ultrasonic transducer and current loop transmitter |
| 05/10/1989 | EP0315142A1 Process for positioning a molecular sieve in an electrical apparatus such as a circuit breaker, and apparatus equipped therewith |
| 05/10/1989 | CN1032886A Gas insulated switching arrangement |
| 05/10/1989 | CN1032882A Compression gas-blast switch |
| 05/09/1989 | US4829150 Gas-blask load-break switch |
| 05/09/1989 | US4829149 Sulfur hexafluoride high-tension circuit-breaker having high performance at any temperature |
| 05/03/1989 | EP0313813A1 Gas blast switch |
| 05/03/1989 | DE3834945A1 Gas-filled switching installation |
| 05/02/1989 | US4827373 High-voltage compressed-gas circuit breaker |
| 05/02/1989 | CA1253545A1 Pulse power controlled vacuum switch |
| 04/26/1989 | EP0313106A2 Electrical switchgear |
| 04/25/1989 | US4823600 Ultrasonic transducer and current loop transmitter |
| 04/25/1989 | CA1253245A1 Solid state circuit interruption employing a stored charge power transistor |
| 04/25/1989 | CA1253184A1 Load break switch with safety mechanism |
| 04/20/1989 | DE3733468A1 Electrical high-voltage power circuit breaker (power switch) |
| 04/19/1989 | CN1032469A Vacuum electric-discharge device |
| 04/18/1989 | US4823232 High-voltage compressed-gas circuit breaker |
| 04/18/1989 | US4822961 Soft break switch |
| 04/18/1989 | US4822291 Gas operated electrical connector |
| 04/18/1989 | CA1252656A1 Electrical insulator column |
| 04/13/1989 | DE3733107A1 Method and device for proving the vacuum of encapsulated vacuum switching tubes, especially in the case of SF6-insulated switching installations |
| 04/12/1989 | EP0311017A2 Arc-extinguisher of switch |
| 04/11/1989 | US4821140 Gas insulated switchgear disconnector arrangement |
| 04/05/1989 | EP0310538A1 Electrical high-voltage circuit breaker |
| 04/05/1989 | EP0310537A1 High-voltage pomer circuit breaker |
| 04/05/1989 | EP0309978A2 Vacuum discharge device |
| 04/05/1989 | EP0309852A1 Method and apparatus for vacuum control in vacuum circuit breakers |
| 04/04/1989 | US4819120 Impedance arrangement for limiting transients |
| 03/29/1989 | EP0309385A1 Pressurised-gas electric circuit breaker, in particular a high-voltage SF6-circuit breaker |
| 03/29/1989 | EP0308862A2 High voltage disconnect switch |
| 03/29/1989 | EP0308847A1 Rotating arc magnetic blast coil for the contact element of an electrical switch |
| 03/29/1989 | EP0308626A2 Self-blast interrupter |
| 03/28/1989 | US4816958 Fault current interrupter including a metal oxide varistor |
| 03/28/1989 | US4816624 Multiphase gas expansion circuit breaker for gas-insulated metalclad cell |
| 03/28/1989 | CA1251818A1 High voltage air-blast circuit breaker |
| 03/23/1989 | DE3730663A1 Electrical high-voltage power circuit breaker (power switch), especially a gas-blast circuit breaker |
| 03/21/1989 | US4814559 Electrical switching device for high switching voltages |
| 03/21/1989 | CA1251522A1 Enclosed thyristor valve |
| 03/15/1989 | EP0307305A1 Electric connection device for an electric terminal, circuit breaker equipped therewith and set of constituent parts therefor |
| 03/15/1989 | EP0307230A2 Spring-powered drive assembly for a switch |
| 03/09/1989 | DE3728400C1 Kontaktanordnung fuer Vakuumschalter Contact arrangement for vacuum switch |
| 03/08/1989 | EP0306439A1 Gas blast electical switch |
| 03/08/1989 | EP0306382A1 Breaker arrangement for an electric multipolar circuit breaker with many contacts |
| 03/08/1989 | CN2033942U 真空断路器 Vacuum Circuit Breaker |
| 03/07/1989 | US4810841 Current-limiting switching element |
| 03/07/1989 | US4810840 Dead tank circuit breaker |
| 03/07/1989 | CA1250942A1 Semiconductor assisted ultra-high speed breaker actuator |