| Patents for H01H 31 - Air-break switches for high tension without arc-extinguishing or arc-preventing means (5,099) |
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| 10/20/2004 | CN2650311Y 数码锁 Digital Lock |
| 10/14/2004 | WO2004032165A3 Make-before-break selector switch |
| 10/14/2004 | US20040201285 Apparatus operating an isolation switch in coordination with a circuit breaker |
| 10/14/2004 | US20040200633 Compliant electrical contact assembly |
| 10/13/2004 | EP1016104B1 Transformer system provided with a decoupling system |
| 10/13/2004 | CN2648579Y Mechanical interlocking operating mechanism for high-voltage switch cabinet |
| 10/13/2004 | CN1171264C High-voltage circuit breaker with high-speed moved moveable contact |
| 09/29/2004 | CN2645216Y Special purpose electric locomotive high-voltage segregation switch |
| 09/29/2004 | CN2645215Y Indoor use AC high-voltage segregation switch |
| 09/23/2004 | US20040184210 Method and apparatus for protection of wildlife from contact with power phase cutout mechanism |
| 09/22/2004 | EP1459341A1 Medium voltage motor control center arc resistant enclosure |
| 09/22/2004 | CN2643466Y Outdoor high-voltage vacuum circuit breaker with isolation knife |
| 09/15/2004 | CN2641812Y Outdoor inject dropping type fuse |
| 09/08/2004 | CN2640017Y Direct-drive type isolating switch |
| 09/08/2004 | CN2640016Y Electric operation mechanism of high-tension isolating switch, earthed switch |
| 09/08/2004 | CN1166040C Power switch installation with disconnecting functions |
| 09/07/2004 | US6788172 Device for controlling the closing of a power circuit breaker |
| 09/02/2004 | US20040169577 Mounting for circuit interrupter |
| 08/26/2004 | US20040164744 Abnormality detection apparatus of comparator |
| 08/24/2004 | US6781079 Switch actuator |
| 08/19/2004 | US20040160227 Apparatus and method for determining the status of an electric power cable |
| 08/18/2004 | CN1162884C Actuator of power load-break switch |
| 08/12/2004 | US20040157432 Method of manufacturing a semiconductor device |
| 08/11/2004 | CN1161868C Air isolating switch device |
| 08/04/2004 | EP1443618A1 Combined multifunctional middle voltage switchgear for middle voltage electric control panels |
| 08/04/2004 | CN1160753C Vacuum type swich gear device having L-shaped stationary and movable conductors arragement |
| 07/28/2004 | CN2629197Y 12KV outdoor AC isolating swtich and grounding swtich |
| 07/22/2004 | US20040140813 Apparatus and method for communications testing |
| 07/22/2004 | DE10160543B4 Stromwandler für eine NH-Sicherungsleiste, NH-Sicherungs-Lastschalteinrichtung oder dergleichen Current transformer for NH fuse strip, NH-fuse switch, or the like |
| 07/21/2004 | CN2627637Y High-voltage switch incorrect manipulation proof device of power system transformer station |
| 07/15/2004 | US20040135667 Resistance assembly for hookstick operated switching assembly |
| 07/15/2004 | DE202004007509U1 High voltage (HV) installation with direct voltage (DC) generator and capacitor battery, interconnected by circuit breaker, whose one side is carried by DC generator |
| 07/13/2004 | US6762434 Electrical print resolution test die |
| 07/13/2004 | US6762376 Circuit breaking apparatus |
| 07/07/2004 | CN2624366Y Wireless error-proof locking box |
| 07/06/2004 | US6759616 Gas insulated switchgear |
| 07/01/2004 | US20040124848 Method and apparatus providing single cable bi-directional triggering between instruments |
| 07/01/2004 | US20040124847 Patchcord length measurement for LAN testers |
| 06/30/2004 | CN2622840Y Special isolator for outdoor low voltage distribution fuse box |
| 06/29/2004 | US6755673 Lever fitting type power supply circuit breaking apparatus |
| 06/24/2004 | WO2004054057A1 Gas-insulated switch gear |
| 06/24/2004 | WO2004053911A1 Air circuit breaker |
| 06/23/2004 | CN1155034C Isolating/earthing switch for metal-encapsulated, gas-insulated high-voltage switchgear |
| 06/22/2004 | CA2106618C Molded case circuit breaker with auxiliary contacts |
| 06/16/2004 | CN1154135C Controller |
| 06/15/2004 | US6750561 Protecting device |
| 06/12/2004 | CA2452507A1 Low current fuse cartridge for circuit interrupter |
| 06/10/2004 | WO2004017348A3 Drive mechanism for switching installation and method for operating it |
| 06/09/2004 | CN1503417A Gas-insulated switch gear |
| 06/03/2004 | US20040104201 Metal-enclosed switchgear |
| 06/02/2004 | CN1152399C Mechanism for operating three-position switch device |
| 06/01/2004 | US6744344 Compact disconnect switch |
| 05/27/2004 | WO2004032165A9 Make-before-break selector switch |
| 05/27/2004 | DE10351766A1 Metallgekapselte Schaltvorrichtung Metal-encapsulated switching device |
| 05/26/2004 | CN1499687A Metallic locking shutter |
| 05/25/2004 | US6740831 Mechanical switching contact |
| 05/25/2004 | CA2092741C In-line isolator |
| 05/20/2004 | US20040095711 Gas-insulated switchgear |
| 05/20/2004 | US20040094394 Make-before-break selector switch |
| 05/12/2004 | CN1496572A Switching contact arrangement for power switch |
| 05/12/2004 | CN1149601C Vacuum switch apparatus |
| 05/11/2004 | CA2135263C Positive locking mechanism for in-line switch |
| 05/06/2004 | EP1245064B1 Isolator switch |
| 05/06/2004 | DE4243537B4 Verfahren zum Schalten eines Sicherungslasttrenners und Sicherungslasttrenner hierzu A method for switching a fuse switch disconnector and fuse switch disconnectors this |
| 04/29/2004 | US20040079731 Gas insulated switchgear |
| 04/27/2004 | US6727442 Medium voltage motor control center load discharge device |
| 04/21/2004 | CN1146932C Switch |
| 04/20/2004 | US6723939 Isolation switch for electric power systems |
| 04/15/2004 | WO2004032165A2 Make-before-break selector switch |
| 04/14/2004 | CN1489167A Gas-insulating switch device |
| 04/14/2004 | CN1145999C Current limiting fuse and dropout fuseholder for interchangeable cutout mounting |
| 04/13/2004 | US6720515 Vacuum interrupter with two contact systems |
| 04/08/2004 | WO2004030007A1 Single pole fuse holder base |
| 04/08/2004 | US20040066257 Switching contact arrangement |
| 04/08/2004 | DE10224158B3 Heavy current switchgear uses switch inserts fitted into switchgear housing transverse to its longitudinal direction |
| 04/07/2004 | CN2610476Y Bus structure of power supply change-over isolating switch |
| 04/07/2004 | CN1487546A High-voltage breaker-isolating switch combination electric device |
| 03/31/2004 | CN2609155Y Looped-network cabinet transformer side-linking earthing switch |
| 03/31/2004 | CN2609154Y Isolated switch conductive tube |
| 03/31/2004 | CN1485869A Design method and apparatus of energy-saving direct current busbar pattern heavy current knife switch |
| 03/30/2004 | US6713679 Terminal pad for an insulator assembly |
| 03/24/2004 | CN1484844A Mechanical switching contact |
| 03/24/2004 | CN1484843A Switching contact arrangement |
| 03/11/2004 | US20040046569 Automatic jack tester |
| 03/11/2004 | US20040045937 Isolation switch for electric power systems |
| 03/11/2004 | CA2440049A1 An isolation switch for electric power systems |
| 03/04/2004 | WO2003028068A3 Spacer for an insulator assembly |
| 03/04/2004 | US20040042158 Gas-insulated switchgear |
| 03/03/2004 | CN2605657Y Programmed manual single-disc mechanical interlocking device for electric control cabinet |
| 03/02/2004 | US6700083 Breaker apparatus |
| 02/26/2004 | WO2004017348A2 Drive mechanism for switching installation and method for operating it |
| 02/24/2004 | US6697247 High voltage system having at least one device for optically detecting a parameter |
| 02/17/2004 | US6693502 Air circuit breaker |
| 02/17/2004 | US6693250 Hybrid gas insulation switchgear apparatus |
| 02/12/2004 | DE10219299B3 Gas-insulated single-pole switching device has load breaker and earthing switches within gas-tight housing having cylindrical section fitted with at least one concave end wall |
| 02/11/2004 | CN1474425A Cable lead wire electric porcelain sleeve for high voltage switch |
| 02/11/2004 | CN1138291C Operating device for switch gear |
| 02/05/2004 | DE19738772B4 Steckvorrichtung Plug-in device |
| 02/05/2004 | DE10020345B4 Stromversorgungsabschalteinrichtung Stromversorgungsabschalteinrichtung |
| 02/04/2004 | CN1473382A Gas insulated switchgear |