| Patents for H01H 31 - Air-break switches for high tension without arc-extinguishing or arc-preventing means (5,099) |
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| 12/06/1989 | EP0344744A2 Disconnector of gas insulated switchgear |
| 11/29/1989 | CN2048621U Bird-proof device for isolate switch |
| 10/26/1989 | DE3812504A1 Combination NH fuse (low-voltage, high rupture capacity fuse) and switching strip |
| 10/10/1989 | CA1262268A1 Infrared signaling system for detecting a predetermined state in a high voltage device |
| 09/26/1989 | US4870387 Beam strengthened cutout insulator |
| 09/26/1989 | CA1260046A1 Disconnect switch for metal-clad, pressurized gas- insulated high-voltage switchgear with damping resistors |
| 08/15/1989 | US4857879 Drop-out expulsion fuse |
| 08/15/1989 | CA1258505A1 Insulating support column with operating member |
| 08/02/1989 | EP0325747A2 Device for mechanic connection of the switch blades of a medium voltage switch with a switch drive |
| 07/27/1989 | DE3800809A1 Mounting hook for electrical switching apparatuses |
| 07/12/1989 | EP0323825A2 Disconnecting switch |
| 07/12/1989 | CN1004781B Earth grounding switch with resistance |
| 07/06/1989 | DE3743544A1 Interrupter switch (isolating switch) |
| 07/04/1989 | CA1256923A1 Bridging isolator with camming action for springless contact pressure |
| 06/29/1989 | DE3742609A1 Contact system for a high-voltage switch |
| 05/02/1989 | US4827374 Flip out fuse assembly |
| 05/02/1989 | US4827088 Electrical ring main unit |
| 04/26/1989 | EP0313106A2 Electrical switchgear |
| 04/12/1989 | CN2035914U Electric operation device for high-voltage disconnecting switch |
| 03/29/1989 | EP0308862A2 High voltage disconnect switch |
| 02/28/1989 | CA1250613A1 Gas-insulated interrupter |
| 02/21/1989 | US4806925 Infrared signalling system for detecting a predetermined state of a high voltage device |
| 02/21/1989 | US4806898 Polyphase interrupter responsive to single phase fault |
| 02/14/1989 | US4804807 Two component operating handle for a primary circuit breaker |
| 01/25/1989 | CN2031571U 20kv ac high voltage isolating switch specially used for railway |
| 01/10/1989 | US4797777 Electronic sectionalizer and mounting structure for switchgear |
| 01/03/1989 | US4795996 Electronic sectionalizer with resettable actuator |
| 01/03/1989 | US4795869 Contact assembly for high-voltage switch |
| 12/15/1988 | DE3718304A1 RF power switch |
| 12/13/1988 | US4791255 Used to alternately deliver electrical power to a load |
| 11/09/1988 | EP0289645A1 Infrared signaling system for detecting a predetermined condition of a high tension device |
| 10/13/1988 | DE3710376A1 Drive device for a movable contact arm of an electrical switchgear unit |
| 10/13/1988 | DE3710374A1 Drive device for actuating at least one rotatably mounted contact blade of a disconnecting switch |
| 10/05/1988 | CN86100367B Break switch |
| 09/27/1988 | US4774627 Metal-encapsulated switching apparatus |
| 09/27/1988 | US4774488 Electric cutout having a link break fuse holder |
| 09/21/1988 | EP0283189A2 Electrical ring main unit |
| 08/31/1988 | CN88200382U Separated commutation and arc-extinction type isolating switchgear |
| 08/30/1988 | US4768010 Latch and pivot mechanism for electronic sectionalizer mounting structure |
| 08/23/1988 | US4766269 Fused trolley switch |
| 08/10/1988 | EP0277401A1 Power line working apparatus |
| 08/09/1988 | CA1240356A1 Disconnect switch for high-voltage switching installation |
| 06/21/1988 | US4752659 Arc interrupter |
| 06/08/1988 | EP0270389A1 Gas insulated multiphase rotating switch |
| 06/07/1988 | CA1237754A1 Circuit breaker with unitary actuating shaft |
| 05/26/1988 | DE3639669A1 Low-voltage, high-power safety switching device with window arrangement |
| 04/20/1988 | CN87204112U Low-voltage bus type insulation switch operated by levers |
| 04/12/1988 | US4737603 For use in hazardous atmosphered |
| 04/06/1988 | EP0262554A2 Device for the connection of installation apparatuses to the current bus-bars of a basic bus-bar system |
| 03/30/1988 | CN87204128U Transmission for indoor isolating-grounding switch |
| 02/11/1988 | DE3723405A1 Rotary interrupter switch (isolating switch) |
| 02/04/1988 | DE3625361A1 Fused load isolator having monitoring contacts |
| 01/21/1988 | DE3623994A1 Busbar quick-action short-circuiting switch and/or earthing switch |
| 01/14/1988 | DE3622486A1 Securing strip for NH fuses (low-voltage, high rupture capacity fuses) |
| 01/12/1988 | CA1231411A1 Connector for telescopic disconnecting switch |
| 12/30/1987 | CN87200944U 10 kv high voltage indoor combined swicth |
| 12/29/1987 | US4715834 Connector for a telescopic isolating switch |
| 12/22/1987 | CA1230629A1 Disconnect switch for metal-clad, pressurized-gas insulated, high-voltage switchgear installation |
| 12/15/1987 | US4713500 Electric bypass switch |
| 11/24/1987 | CA1229638A1 Electrical cutout having linkbreak lever |
| 11/17/1987 | US4707574 Disconnect switch with latch |
| 11/03/1987 | US4704507 Encapsulated pressurized gas insulated high voltage installation |
| 10/28/1987 | CN86208982U Operational mechanism for using high-voltage disconnecting switch |
| 10/21/1987 | CN87200410U Locking type, major current, high voltage isolating switch with ground knife |
| 10/07/1987 | CN87102380A Arc interrupter |
| 09/29/1987 | CA1227517A1 Disconnect switch |
| 09/29/1987 | CA1227516A1 Disconnect switch |
| 09/23/1987 | EP0238151A2 Manually operable high voltage air break switch |
| 09/23/1987 | EP0238030A2 Earthing system for a spray booth |
| 09/23/1987 | EP0238029A2 Electrical high-tension switch for earthing an electrostatic coating device |
| 09/23/1987 | EP0237857A2 Driving gear for an electric disconnecting switch |
| 09/16/1987 | EP0236886A2 Metal-enclosed switchgear |
| 09/10/1987 | DE3606960A1 Interrupter switch having a switching cover |
| 08/27/1987 | DE3606244A1 Contact system for an electrical switching apparatus |
| 08/18/1987 | US4688013 Switchgear assembly for electrical apparatus |
| 08/11/1987 | CA1225226A1 Collapsible disconnecting switch |
| 07/21/1987 | US4681990 Electric by-pass switch |
| 07/07/1987 | US4678876 Isolating switch apparatus for a high-voltage switching system which may be insulated with SF6 gas |
| 06/19/1987 | DE3544534A1 Switchable NH fuse with a junction device |
| 06/16/1987 | CA1223024A1 Device for disconnecting a load and visibly opening an electrical circuit |
| 06/03/1987 | EP0224051A1 Sulphur hexafluoride station for load switching |
| 06/03/1987 | EP0223939A1 Polyphase high tension isolating switch |
| 04/29/1987 | CN86204338U Dual closing electromagnet for electromagnetic mechanism of high-voltage circuit breaker |
| 04/28/1987 | US4661662 Power line working apparatus |
| 04/21/1987 | US4659886 Disconnect switch for a metal-clad, gas-insulated high-voltage switchgear |
| 04/16/1987 | DE3536213A1 Protection load interruptor circuit breaker |
| 04/09/1987 | DE3536068A1 Protection (safety) load interruptor circuit breaker |
| 03/10/1987 | US4649237 Power line/transformer switch |
| 03/03/1987 | US4647731 Transformer crankshaft load selector |
| 03/03/1987 | US4647730 Rotary isolating switch, especially encapsulated rotary isolating switch |
| 02/19/1987 | DE3528770A1 Medium-voltage switching installation |
| 02/17/1987 | US4644113 Electric safety device |
| 02/04/1987 | CN85103335A Earthed switch of the switch device of gas isolation |
| 01/22/1987 | DE3524813A1 Load interrupter switch |
| 01/13/1987 | US4636764 Automatic sectionalizer |
| 01/07/1987 | EP0207566A1 Pivot for a switching cap, especially for cartridges with knife blades |
| 01/07/1987 | CN85105287A Eearth grounding switch with resistance |
| 01/02/1987 | DE3537295C1 Interruptor switch |
| 12/30/1986 | US4633047 Isolator switch with interlock |
| 12/30/1986 | CA1216020A1 Grounding switch |