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1. 发明专利

CA2099944A1 Solid-State Switch 未知
公开(公告)号：CA2099944A1
公开(公告)日：1994-03-19
申请号：CA2099944
申请日：1993-07-06
申请人： HITACHI LTD
发明人： KIDA JUNZO , ARITA HIROSHI , KUROSAWA YUKIO
IPC分类号： G05F1/12 , H03K17/10 , H03K17/725 , H02J3/00
摘要： A solid-state switch has a plurality of gate turn-off thyristors connected in the rungs of a ladder circuit and a plurality of diodes connected in the side rails of the ladder circuit. The anode of the first gate turn-off thyristor is connected to the cathodes of the first and second diodes, the cathode of the first gate turn-off thyristor is connected to the anodes of the third and fourth diodes. The cathode of the second gate turn-off thyristor is connected to the anode of the second diode and the anode of the fifth diode, the anode of the second gate turn-off thyristor is connected to the cathode of the fourth diode and the cathode of the sixth diode. The anode of the first diode and the cathode of the third diode are connected together at a common point, which is selected to be one terminal of the switch. The cathode of the fifth diode and the anode of the sixth diode or the anode of one and the cathode of the other one of the last two diodes of the ladder circuit are connected together at a common point, which is selected to be the other terminal of the switch.

2. 发明专利

CA2178356A1 A HIGH VOLTAGE ELECTRIC POWER LINE CURRENT LIMITER 未知
公开(公告)号：CA2178356A1
公开(公告)日：1996-12-21
申请号：CA2178356
申请日：1996-06-06
申请人： HITACHI LTD
发明人： KIDA JUNZO , ARITA HIROSHI
IPC分类号： H02H9/02 , H02H9/08 , H02H3/02 , H02H3/08
摘要： A current limiter is used for stable control of an electric power system, especially a high voltage system. The current limiter maintaining the voltage below the withstanding level, and it is easy to introduce into the system. The limiting device is inserted between a low potential terminal of a winding of star-connection of a three-phase transformer that has at least one star- connected winding and ground.

3. 发明专利

BR0302063A 未知
公开(公告)号：BR0302063A
公开(公告)日：2004-08-17
申请号：BR0302063
申请日：2003-05-30
申请人： HITACHI LTD
发明人： OKABE MAMORU , TANAKA TOYOKAZU , KIDA JUNZO
IPC分类号： H01H1/58 , H01H3/00 , H01H33/02 , H02B13/035

4. 发明专利

HK1058260A1 Current collector and gas circuit breaker 未知
公开(公告)号：HK1058260A1
公开(公告)日：2004-05-07
申请号：HK04101001
申请日：2004-02-13
申请人： HITACHI LTD
发明人： KIDA JUNZO , HIROSE MAKOTO , ANDOU TOMOYUKI
IPC分类号： H01H33/915 , H01H1/38 , H01H33/02 , H01H
摘要： A current collector, in which contact portions are free from dissolved loss even both fixed and moving contacts slidingly contact with each other, and durability as well as a current-carrying perfomance is improved, including a container, which is filled with an insulating arc-extinguishing medium and in which a cylindrical-shaped fixed contact and an torus-shaped contact disposed concentrically with the fixed contact and adapted to come into fitting contact with the fixed contact to carry current are received, and a torus-shaped current collecting member formed from a conductive material and provided on a contact portion of the torus-shaped contact.

5. 发明专利

HK1060438A1 Gas-insulated switchgear 未知
公开(公告)号：HK1060438A1
公开(公告)日：2004-08-06
申请号：HK04103414
申请日：2004-05-14
申请人： HITACHI LTD
发明人： OKABE MAMORU , TANAKA TOYOKAZU , KIDA JUNZO
IPC分类号： H01H1/58 , H01H3/00 , H01H33/02 , H02B13/035 , H01H , H02B

6. 发明专利

CA2099944C SOLID-STATE SWITCH 未知
公开(公告)号：CA2099944C
公开(公告)日：1996-07-09
申请号：CA2099944
申请日：1993-07-06
申请人： HITACHI LTD
发明人： KIDA JUNZO , ARITA HIROSHI , KUROSAWA YUKIO
IPC分类号： G05F1/12 , H03K17/10 , H03K17/725 , H02J3/00
摘要： A solid-state switch has a plurality of gate turn-off thyristors connected in the rungs of a ladder circuit and a plurality of diodes connected in the side rails of the ladder circuit. The anode of the first gate turn-off thyristor is connected to the cathodes of the first and second diodes, the cathode of the first gate turn-off thyristor is connected to the anodes of the third and fourth diodes. The cathode of the second gate turn-off thyristor is connected to the anode of the second diode and the anode of the fifth diode, the anode of the second gate turn-off thyristor is connected to the cathode of the fourth diode and the cathode of the sixth diode. The anode of the first diode and the cathode of the third diode are connected together at a common point, which is selected to be one terminal of the switch. The cathode of the fifth diode and the anode of the sixth diode or the anodes of the last two diodes are connected together at a common point, which is selected to be the other terminal of the switch.

7. 发明专利

JP2007073384A Puffer type gas circuit breaker 有权
标题翻译： PUFFER型气体断路器
公开(公告)号：JP2007073384A
公开(公告)日：2007-03-22
申请号：JP2005260031
申请日：2005-09-08
申请人： Hitachi Ltd , Japan Ae Power Systems Corp , 株式会社日本Aeパワーシステムズ , 株式会社日立製作所
发明人： OSAWA NAOKI , URAI HAJIME , OSHITA YOICHI , KIDA JUNZO , MOROOKA HISAJI
IPC分类号： H01H33/70 , H01H33/915
摘要： PROBLEM TO BE SOLVED: To provide a puffer type gas circuit breaker capable of preventing an inner diameter of a nozzle throat part from being enlarged at the time of blocking of short circuit current, generating high spray pressure and stably performing high current blocking performance. SOLUTION: The puffer type gas circuit breaker includes a gas-stream-forming means to extinguish arc generated between arcing contactors arranged in opposition. The gas-stream-forming means is structured by an pressure accumulation means and an insulation nozzle to induce gas flow from the pressure accumulation means to the arc. The insulation nozzle includes a throat part to narrow down the gas flow and an upstream part to connect from the throat part to the pressure accumulation means. A member formed of a material with larger black color density index than the throat part is provided in a space pinched between the pressure accumulation means and the throat part. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供一种能够防止在堵塞短路电流时喷嘴喉部的内径扩大的吹气式气体断路器，产生高喷雾压力并稳定地进行高电流阻塞性能。解决方案：吹气式气体断路器包括气流形成装置，用于熄灭以相对布置的电弧接触器之间产生的电弧。气流形成装置由压力累积装置和绝缘喷嘴构成，以引起气体从压力累积装置流到电弧。绝缘喷嘴包括用于使气体流动变窄的喉部和从喉部连接到压力累积装置的上游部分。由压力积聚装置和喉部之间的空间中设置由黑色浓度指数大于喉部的材料形成的部件。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2001210197A GAS CIRCUIT BREAKER 失效
公开(公告)号：JP2001210197A
公开(公告)日：2001-08-03
申请号：JP2000019078
申请日：2000-01-27
申请人： HITACHI LTD
发明人： TAMURA WATARU , KIDA JUNZO , SOGA TAKUICHIRO , KAWAMOTO HIDEO
IPC分类号： H02B13/02 , H01H33/42
摘要： PROBLEM TO BE SOLVED: To protect an operating mechanism part of a gas circuit breaker with single structure by covering it with an integrally constructed protective cover. SOLUTION: This gas circuit breaker comprises a gas tank 20 filled with an arc-extinguishing gas, a breaking part built in the gas tank and a plurality of gas circuit breakers consisting of operating mechanism parts whose breaking parts are opened/closed from the outside of the gas tank by means of an operating rod. In a gas circuit breaker formed by interconnecting the plurality of the operating mechanism parts of the gas circuit breakers, the plurality of operating mechanism parts are covered with an integrally constructed operating mechanism case 420.

9. 发明专利

JP2000152439A TRANSPORTING EQUIPMENT AND TRANSPORTING METHOD OF METER TRANSFORMER 失效
公开(公告)号：JP2000152439A
公开(公告)日：2000-05-30
申请号：JP31431298
申请日：1998-11-05
申请人： HITACHI LTD , TOKO ELECTRIC CORP
发明人： TSUZURA KEIICHI , TAKAHASHI KAZUHIKO , KIDA JUNZO , YABUKI MINORU , IWAMOTO SHINICHI
IPC分类号： H01F27/02 , H02B3/00
摘要： PROBLEM TO BE SOLVED: To obtain transporting equipment of a meter transformer which has a tank for transportation where the transformer can be easily taken out from the tank for transportation without exposing the transformer to the atmosphere, from assembly of the transformer to incorporation into a line side unit through insulation teat of the transformer. SOLUTION: This transporting equipment is provided with an insulating spacer 22 installed in the lower part of a cylindrical vessel 21, a flange for attaching a ceiling cover 32 installed on a meter transformer (6) on the upper part of the cylindrical vessel 21, and a gas valve 25 for filling insulating gas. The transformer (6) is accommodated in a hermetically shielded space formed by the cylindrical vessel 21, the insulating spacer 22 and the ceiling cover 32. The hermetically shielded space is filled with the insulating gas by using the gas valve 25.

10. 发明专利

JP2000139008A GAS INSULATED SWITCHGEAR 失效
公开(公告)号：JP2000139008A
公开(公告)日：2000-05-16
申请号：JP30984098
申请日：1998-10-30
申请人： HITACHI LTD
发明人： KIDA JUNZO , TAKAHASHI KAZUHIKO , TSUZURA KEIICHI , YABUKI MINORU
IPC分类号： H02B13/02 , H02B3/00
摘要： PROBLEM TO BE SOLVED: To interrupt power on a failed line only when required for a work and also prevent the power interruption of other active lines by providing switches on the line that connects breakers to a bus, and by arranging the switches on each of bus and circuit breakers. SOLUTION: Disconnecting switches 203a, 203b, 203c, 204a, 204b, 204c for circuit breakers are provided on the lines between a bus and breakers. The switches 203a-203c are arranged at each side of breakers 103a-103c. When a failure occurs, the charged part of the breaker 103c is prevented from being exposed to air by opening the switch 203c instead of a breaker 221c and switches 201c, 205c. This structure can transmit power in the active lines including the neighboring lines even when a repair work is under way.

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