| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 03/02/1989 | DE3727802A1 Self-extinguishing gas-blast circuit breaker |
| 03/01/1989 | CN2033542U Operation mechanism of switchgear |
| 03/01/1989 | CN1031445A Latch mechanism for fast-action circuit-breaker |
| 02/28/1989 | US4808777 Electric switch |
| 02/28/1989 | US4807514 Differential hydraulic jack with damping system for the control of electric circuit-breakers |
| 02/28/1989 | CA1250613A1 Gas-insulated interrupter |
| 02/22/1989 | EP0303807A1 High-frequency power switch |
| 02/21/1989 | US4806716 High voltage contact assembly |
| 02/21/1989 | US4806714 Electrode structure for vacuum circuit breaker |
| 02/15/1989 | CN1031153A High-or medium-tension compressed-gas circuit breaker taking circuit-breaking energy from arc |
| 02/14/1989 | US4805062 DC circuit breaker and method of commutation thereof |
| 02/14/1989 | US4804933 Automatic transfer switch |
| 02/14/1989 | CA1250010A1 Screen circuit-breaker |
| 02/14/1989 | CA1250009A1 Screen circuit-breaker |
| 02/09/1989 | WO1989001231A1 Contact material for vacuum switches and process for manufacturing same |
| 02/09/1989 | DE3724813A1 Contact arrangement for a vacuum switch |
| 02/09/1989 | DE3724811A1 Contact arrangement for a vacuum switch |
| 02/08/1989 | EP0302721A2 Switch assembly |
| 02/08/1989 | EP0302390A1 High or medium voltage gas blast circuit breaker with opening energy taken from the arc energy |
| 02/07/1989 | US4803587 Arrangement for change-over contact apparatus protection with interlocking member and module |
| 02/07/1989 | US4803319 Rotary switch with curved arc root migration track |
| 02/07/1989 | US4802731 Optical waveguide arrangement for a high-voltage insulator |
| 02/01/1989 | CN1030844A 开关操作装置 Switch operating device |
| 01/31/1989 | US4801910 Magnetic actuating mechanism |
| 01/25/1989 | EP0300308A2 Contact arrangement for vacuum power circuit breaker |
| 01/25/1989 | EP0300270A1 Latch arrangement for a high-speed circuit breaker |
| 01/24/1989 | US4800242 Spring-powered drive assembly for opening and closing a switch |
| 01/24/1989 | CA1249319A1 High voltage electric switch with arc extinguishing device using self-generation of a quenching pressure |
| 01/19/1989 | DE3722541A1 Autopneumatic gas-blast circuit breaker |
| 01/18/1989 | EP0299460A2 Arc extinguishing apparatus |
| 01/18/1989 | EP0299440A2 Apparatus for electrically operating a circuit breaker |
| 01/18/1989 | EP0299401A1 Quenching chamber for interruption of loadcurrent circuits |
| 01/18/1989 | EP0298981A1 Contact system for vacuum switches with an axial magnetic field. |
| 01/18/1989 | CN1030496A Electric circuit breaker with revolving and expanding arc. |
| 01/17/1989 | US4798924 Compressed-gas breaker |
| 01/17/1989 | US4798921 Vacuum circuit breaker |
| 01/17/1989 | CA1249005A1 Electrical circuit breaker with arc extinguishing compressed fluid |
| 01/17/1989 | CA1249004A1 Interrupter with chamber pressurized by breakdown of arc quenching fluid |
| 01/17/1989 | CA1249003A1 Circuit breaker of spiral arc type |
| 01/11/1989 | EP0298809A1 Self-blasting electrical circuit breaker with a rotating arc |
| 01/11/1989 | CN1030326A Tank type breaker |
| 01/10/1989 | US4797522 Vacuum-type circuit interrupter |
| 01/03/1989 | US4795996 Electronic sectionalizer with resettable actuator |
| 01/03/1989 | US4795866 Vacuum tube switch which uses low temperature solder |
| 01/03/1989 | US4794950 Three-way hydraulic valve |
| 12/28/1988 | EP0296915A1 Rotating switch with curved arc-runner path |
| 12/28/1988 | EP0296896A1 High pressure arc extinguishing chamber |
| 12/28/1988 | EP0296631A2 Apparatus for electrically operating a circit breaker |
| 12/28/1988 | EP0296363A2 Circuit breaker with selfproduced flow of extinguishing gas |
| 12/28/1988 | EP0296183A1 Circuit breaker contact assembly. |
| 12/28/1988 | EP0296181A1 Circuit breaker arc stack assembly. |
| 12/28/1988 | CN88103437A Buffer gas circuit interrupter |
| 12/22/1988 | DE3719256A1 Vacuum switching chamber |
| 12/22/1988 | DE3718869A1 Hydraulic drive for a high-voltage (high-tension) switching apparatus (switch gear) |
| 12/20/1988 | CA1247176A1 Ganged circuit breaker arrangement |
| 12/20/1988 | CA1247175A1 Oleopneumatic control system for electric circuit- breakers |
| 12/14/1988 | EP0294561A2 Operating mechanism for a circuit breaker |
| 12/14/1988 | CN88103415A Interrupter operation mechanism |
| 12/13/1988 | US4791518 Device for detecting interfering arcs |
| 12/13/1988 | US4791256 Insulated nozzle for use in an interrupter |
| 12/13/1988 | US4791250 Trip-free, three-link switch assembly |
| 12/13/1988 | CA1246644A1 Mechanical interlock for vertically mounted circuit breakers |
| 12/08/1988 | DE3718108A1 Vacuum switch |
| 12/07/1988 | EP0294313A1 Vacuum switch with a wrapping and manufacturing process thereof |
| 12/07/1988 | EP0293909A2 Switch operating mechanism |
| 12/07/1988 | CN88103292A Gas interrupter for electric power |
| 12/07/1988 | CN88103210A Vacuum switch tube with capsule |
| 12/06/1988 | CA1246127A1 Internal combustion circuit breaker |
| 11/30/1988 | EP0293323A1 Encapsulated vacuum switch |
| 11/30/1988 | CN88102715A Operation mechanism for electric circuit breaker |
| 11/30/1988 | CN88102464A Hydraulic three-way valve |
| 11/29/1988 | US4788392 Tank type gas circuit breaker |
| 11/29/1988 | US4788391 Hydraulic or pneumatic drive for actuating the movable switch contact of a medium and/or high-voltage power switch |
| 11/29/1988 | US4788390 Shunt capacitor switch with an impedance insertion element |
| 11/29/1988 | CA1245697A1 Gas-blast circuit-breaker that can be assembled and disassembled without any sensible loss of gas |
| 11/29/1988 | CA1245696A1 Contact overtravel adjustment apparatus for a vacuum contactor |
| 11/29/1988 | CA1245695A1 Vacuum contactor kickout spring adjustment apparatus |
| 11/29/1988 | CA1245694A1 Mechanical interlock mechanism for a vacuum contactor |
| 11/29/1988 | CA1245693A1 Sulphur hexafluoride circuit-breaker operating in a very low temperature environment |
| 11/24/1988 | DE3811368A1 Blowing nozzle for a gas-blast circuit breaker |
| 11/23/1988 | EP0292268A2 Impedance arrangement for limiting transients |
| 11/23/1988 | EP0291762A2 Metal-clad, gas filled, multiphase high voltage switchgear |
| 11/22/1988 | US4786770 Switchgear |
| 11/22/1988 | US4785712 Hydraulic operating apparatus for electric circuit breaker |
| 11/22/1988 | CA1245258A1 Vacuum contactor with integral shaft |
| 11/17/1988 | EP0290950A1 Pressurized-gas circuit breaker |
| 11/17/1988 | DE3717864A1 Vacuum switch |
| 11/16/1988 | CN88102677A Multi-phase high voltage switching device with metal casing filled by high pressure gas |
| 11/15/1988 | CA1244795A1 Current bypass assembly for electrolytic cells |
| 11/02/1988 | EP0289386A1 Three-way hydraulic valve |
| 11/02/1988 | EP0289042A2 Circuit breaker |
| 10/26/1988 | EP0288417A1 High-voltage power circuit breaker |
| 10/26/1988 | CN88102072A Differential hydraulic jack with damping system for control of electric circuit-breakers |
| 10/26/1988 | CN88102071A Action monitor of switchgears |
| 10/25/1988 | US4780690 Filter arrangement having a transconductance circuit |
| 10/25/1988 | US4780582 Use of a fusion material of copper and chrome as the contact material for vacuum contactors |
| 10/25/1988 | US4780581 Suicide switch/interrupter with variable volume chamber and puffer action |
| 10/19/1988 | EP0287434A1 Differential hydraulic jack, with a damping device, for operating electric breakers |
| 10/18/1988 | US4778958 Material for electric contacts having arc-quenching properties |
| 10/18/1988 | CA1243342A1 Gas-insulated circuit breaker |