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1. 发明专利

DE68919106D1 未知
公开(公告)号：DE68919106D1
公开(公告)日：1994-12-08
申请号：DE68919106
申请日：1989-03-28
申请人： HITACHI LTD
发明人： SATO MINORI , KASHIMURA KASTUICHI , TSUKUSHI MASANORI , KUROSAWA YUKIO , SAITO KAZUHIRO , KOYANAGI OSAMU , NISHIDA ISAO
IPC分类号： H01H33/16 , H01H33/24 , H02B11/26
摘要： In a circuit breaker in which an interrupting device, a resistor device and a capacitor device (2) are connected in parallel, a shield device is arranged to shield the interrupting device and the resistor device and comprises a first shield (17) for shielding the stationary main contact (5) and stationary resistor contact (22) and a second shield (16) for shielding the movable main contact (7) and movable resistor contact (20). Each of the first shield (17) and the second shield (16) comprises a large shield portion (17A, 16A) and a small shield portion (17B, 16B), and the small shield portions (16B, 17B) are arranged between the large shield portions (16A, 17A). The small shield portion (16B, 17B) terminates in the vicinity of the top of the main contact and of the top of the resistor contact. The small shield portion (16B, 17B) comprises wide portions situated substantially in the direction of an axis joining centers of the main contact and resistor contact and narrow portions situated substantially in the direction perpendicular to the axis. The width of the narrow portions is smaller than the width of the wide portions, and at least a part of the capacitor device (2) is arranged over the narrow portions. In the circuit breaker, since the capacitor device (2) is arranged over the narrow portions, the space for arranging the capacitor device (2) is larger than the conventional circuit breaker, the arrangement of the isoelectric lines is not disturbed or disordered locally in the vicinity of the top of the shield of the stationary main contact (5) and in the vicinity of the movable main contact (7) and high dielectric strength between the main contacts is obtained.

2. 发明公开

EP1821320A4 ARRESTOR AND METHOD OF MEASURING LEAKAGE CURRENT OF ARRESTOR 审中-公开
标题翻译：浪涌保护装置和方法测量流量泄漏避雷器
公开(公告)号：EP1821320A4
公开(公告)日：2013-06-19
申请号：EP05814184
申请日：2005-12-08
申请人： HITACHI LTD , SWCC SHOWA CABLE SYS CO LTD
发明人： ITO ATSUSHI , WATAHIKI SATOSHI , SAITO KAZUHIRO , IWAIDA TAKESHI , NAKAJIMA MASATOSHI , WAN SHINAN , ADACHI KAZUHISA , SEMA NOBUYUKI , SINAGAWA JYUNICHI
IPC分类号： H01C7/12 , H01T1/00 , H02B3/00 , H02B13/02 , H02B13/065
CPC分类号： H01C7/12 , H01C7/126

3. 发明公开

EP1261091A4 GAS INSULATED DEVICE AND FAILURE RATING METHOD 审中-公开
标题翻译：气体绝缘系统的误差评估程序
公开(公告)号：EP1261091A4
公开(公告)日：2005-03-09
申请号：EP00906601
申请日：2000-03-01
申请人： HITACHI LTD
发明人： KATO TATSURO , UTSUMI TOMOAKI , ENDO FUMIHIRO , KOBAYASHI KAZUO , SAITO KAZUHIRO
IPC分类号： G01R15/14 , G01R15/16 , G01R31/12 , H01H33/02 , H02B13/035 , H02B13/065 , G01R31/08
CPC分类号： H02B13/065 , G01R15/142 , G01R15/16 , G01R31/1254 , H01H33/027 , H02B13/0356
摘要： A gas insulated device reduced in size, wherein sensors (22, 23) of equipment for measuring the current and/or voltage appearing in a line extending from a power inlet to a power outlet and a bushing (150, 160) installed in the power inlet and/or outlet are combined. In particular, the sensors (22, 23) are installed in a space defined in a hollow porcelain (15) constituting the bushing (150, 160). This space is preferably located outside an electric field moderating member (21) installed in the hollow porcelain (15).

4. 发明专利

DE68919106T2 未知
公开(公告)号：DE68919106T2
公开(公告)日：1995-05-24
申请号：DE68919106
申请日：1989-03-28
申请人： HITACHI LTD
发明人： SATO MINORI , KASHIMURA KASTUICHI , TSUKUSHI MASANORI , KUROSAWA YUKIO , SAITO KAZUHIRO , KOYANAGI OSAMU , NISHIDA ISAO
IPC分类号： H01H33/16 , H01H33/24 , H02B11/26
摘要： In a circuit breaker in which an interrupting device, a resistor device and a capacitor device (2) are connected in parallel, a shield device is arranged to shield the interrupting device and the resistor device and comprises a first shield (17) for shielding the stationary main contact (5) and stationary resistor contact (22) and a second shield (16) for shielding the movable main contact (7) and movable resistor contact (20). Each of the first shield (17) and the second shield (16) comprises a large shield portion (17A, 16A) and a small shield portion (17B, 16B), and the small shield portions (16B, 17B) are arranged between the large shield portions (16A, 17A). The small shield portion (16B, 17B) terminates in the vicinity of the top of the main contact and of the top of the resistor contact. The small shield portion (16B, 17B) comprises wide portions situated substantially in the direction of an axis joining centers of the main contact and resistor contact and narrow portions situated substantially in the direction perpendicular to the axis. The width of the narrow portions is smaller than the width of the wide portions, and at least a part of the capacitor device (2) is arranged over the narrow portions. In the circuit breaker, since the capacitor device (2) is arranged over the narrow portions, the space for arranging the capacitor device (2) is larger than the conventional circuit breaker, the arrangement of the isoelectric lines is not disturbed or disordered locally in the vicinity of the top of the shield of the stationary main contact (5) and in the vicinity of the movable main contact (7) and high dielectric strength between the main contacts is obtained.

5. 发明专利

CA1325234C CIRCUIT BREAKER 未知
公开(公告)号：CA1325234C
公开(公告)日：1993-12-14
申请号：CA594669
申请日：1989-03-23
申请人： HITACHI LTD
发明人： SATO MINORI , KASHIMURA KASTUICHI , TSUKUSHI MASANORI , KUROSAWA YUKIO , SAITO KAZUHIRO , KOYANAGI OSAMU , NISHIDA ISAO
IPC分类号： H01H33/16 , H01H33/24 , H02B11/26
摘要： In a circuit breaker in which an interrupting device, a resistor device and a capacitor device are connected in parallel, a shield device is arranged to shield the interrupting device and the resistor device and comprises a first shield for shielding the stationary main contact and stationary resistor contact and a second shield for shielding the movable main contact and movable resistor contact. Each of the first shield and the second shield comprises a large shield portion and a small shield portion, and the small shield portions are arranged between the large shield portions. The small shield portion terminates in the vicinity of the top of the main contact and of the top of the resistor contact. The small shield portion comprises wide portions situated substantially in the direction of an axis joining centers of the main contact and resistor contact and narrow portions situated substantially in the direction perpendicular to the axis. The width of the narrow portions is smaller than the width of the wide portions, and at least a part of the capacitor device is arranged over the narrow portions.

6. 发明专利

JP2002262503A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JP2002262503A
公开(公告)日：2002-09-13
申请号：JP2001056351
申请日：2001-03-01
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KUNIYA KENJI , YASUHARA TAKASHI , OBARA SANSHIRO , SAITO KAZUHIRO
IPC分类号： H02K5/04
摘要： PROBLEM TO BE SOLVED: To provide a strong rotating electric machine improved in cooling performance, miniaturization and stiffness. SOLUTION: This rotating electric machine is constituted of a housing 1 of a cylindrical shape, end brackets 2a, 2b assembled in both ends of a housing 1, a stator 3 mounted in the internal peripheral side of the housing 1, and a rotor 4 positioned in the internal peripheral side of the stator 3 and supported capable of rotating to the end bracket. The housing 1 is formed by integrally connecting a pure aluminum part 1b and aluminum alloy parts 1c, 1c' through a friction stirring connection.

7. 发明专利

JPH03139109A MALFUNCTION DETECTOR OF GAS-INSULATED SWITCHGEAR 失效
公开(公告)号：JPH03139109A
公开(公告)日：1991-06-13
申请号：JP27591689
申请日：1989-10-25
申请人： HITACHI LTD
发明人： NISHIDA ISAO , KISHI TSUNEO , SASAKI KOJI , FUKUOKA MASARU , SAITO KAZUHIRO
IPC分类号： H02B13/055 , H02H5/00
摘要： PURPOSE:To detect a partial discharge due to a defective internal insulation with a good accuracy by providing a detecting means including a detecting agent, which reacts on the decomposition gas SO2 of SF6 gas generated by a partial discharge accompanying the defective insulation to change color, in the vicinity of a supply and exhaust stop valve provided to a closed vessel. CONSTITUTION:A detecting means 2 mounted on the atmospheric side of SF6 supply and exhaust stop valve 1 detects the generation of a partial discharge due to a defective insulation in a closed vessel 11. For example, when the supply and exhaust stop valve 1 and an exhaust valve 6 are closed usually and the supply and exhaust stop valve 1 is opened at the time of detection, SF6 gas filling up the closed vessel 11 flows into a gas holding chamber 3 via the supply and exhaust stop valve 1. After that, when the supply and exhaust stop valve 1 is closed and the exhaust valve 6 is opened, a predetermined quantity of gas in the gas holding chamber 3 is discharged into the air from a through hole 13b while touching a detecting agent 7 in a detecting tube 5 from a through hole 13a. At that time, the detecting agent 7 reacts on decomposition products and changes color when SO2 exists.

8. 发明专利

JPH0246616A EARTHING TANK TYPE GAS-BLAST CIRCUIT BREAKER 失效
公开(公告)号：JPH0246616A
公开(公告)日：1990-02-16
申请号：JP19599088
申请日：1988-08-08
申请人： HITACHI LTD
发明人： SATO MINORU , KASHIMURA KATSUICHI , TSUKUSHI MASANORI , KUROSAWA YUKIO , SAITO KAZUHIRO
IPC分类号： H01H33/70
摘要： PURPOSE:To make it possible to manufacture in a small size and economically even though the breaker is for a high voltage and a large capacity by providing shield members which consist of a cylindrical shield and a small shield at the fixing side and at the movable side of a breaking member, and providing a capacitor device at the position at the outer surface of the small shield and inside the cylindrical shield. CONSTITUTION:At the movable side and the fixing side of a breaking member 1 and a resistance device 19, shield members 16 and 17 formed in specific shapes are provided respectively. By utilizing an arc-form space surrounded by the imaginary circles of small shields 16B and 17B, and cylindrical shields 16A and 17A, which are parts of the shield members 16 and 17, a capacitor 2 to suppress a transient voltage and to control a share voltage of the breaking member 1 is positioned, and fixed and held by fixing metals 14 and 15 at the movable side and the fixing side. As a result, equipotential lines are distributed along the curvature r of the small shields 16B and 17B in equal intervals, and relax the electric field intensity at the pole extensively, making the breaking member for a high voltage and a large capacity in a compact size. Consequently, an earthing tank type gas-blast circuit breaker for a high voltage and a large capacity can be manufactured in a compact size and ecconomically.

9. 发明专利

JP2002262514A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JP2002262514A
公开(公告)日：2002-09-13
申请号：JP2001057009
申请日：2001-03-01
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SAITO KAZUHIRO , SATO MASAYUKI , MATSUMOTO TAKEHIRO , YASUHARA TAKASHI , KUNIYA KENJI
IPC分类号： H02K5/20 , H02K9/06
摘要： PROBLEM TO BE SOLVED: To ensure an improvement in required cooling performance and the downsizing of a rotating electric machine. SOLUTION: Protrusions 11a, 11b axially extending are formed in a housing 1 at a boundary between exhaust ports 1a, 1b and sections without the exhaust ports. By making cooling air flow along the protrusions 11a, 11b, it is possible to prevent the generation of an air eddy caused by a pressure difference between an upper side without the exhaust ports and a lower side with the exhaust ports 1a, 1b, release the disturbance of the cooling air, obtain the smooth circulation of the cooling air, restrain the temperature of the rotating electric machine from rising, and reduce the size and weight of the rotating electric machine.

10. 发明专利

JPH07213025A BRUSH DEVICE 失效
公开(公告)号：JPH07213025A
公开(公告)日：1995-08-11
申请号：JP617694
申请日：1994-01-25
申请人： HITACHI LTD , HITACHI CAR ELECTRONICS
发明人： KUNIYA KENJI , SAITO KAZUHIRO , YASUJIMA KO
IPC分类号： H01R39/58 , H02K13/00
摘要： PURPOSE:To improve the workability at the time of attachment and, further, eliminate the necessity of the alignment of a brush wear detection device. CONSTITUTION:A brush device is composed of brush holder attaching legs 1 and a brush wear detection device 3. With this constitution, the workability at the time of attachment is improved and, further, the adjustment to ailgn the brush wear detection device 3 with the center of the trench of the brush.

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