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31. 发明专利

JP2004071436A Vacuum circuit breaker 有权
公开(公告)号：JP2004071436A
公开(公告)日：2004-03-04
申请号：JP2002230924
申请日：2002-08-08
申请人： Shibafu Engineering Corp , Toshiba Corp , 株式会社東芝 , 芝府エンジニアリング株式会社
发明人： OKUTOMI ISAO , KUSANO TAKASHI , YAMAMOTO ATSUSHI , MINAMI YOSHIKO , HONMA MITSUTAKA
IPC分类号： C22C29/06 , C22C27/04 , C22C29/08 , H01H1/02 , H01H1/021 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a vacuum circuit breaker having an excellent breaking characteristics and an excellent reignition characteristics by optimizing various metallurgic conditions of Cu-W alloy or Cu-WC alloy. SOLUTION: Each contact of this vacuum circuit breaker is formed of a contact material containing 10-50 wt.% of a conductive constituent phase formed of Cu, and 50-90 wt.% of an arc-resisting constituent formed of W (or WC). The ratio of the difference (T1-T2) value between a fusion start temperature T1 obtained by measuring the conductive constituent phase formed of Cu in the contact material on the Celsius basis in a heating process and a coagulation start temperature T2 obtained by measuring the conductive constituent phase formed of Cu on the Celsius basis in a cooling process after heating it to at least 1,200°C to the temperature T1, that is, [(T1-T2)×100/T1] is set less than 2.8%. Thereby, both the breaking characteristics and the reignition characteristics can be satisfied. COPYRIGHT: (C)2004,JPO

32. 发明专利

JP2004039410A Vacuum circuit breaker 审中-公开
公开(公告)号：JP2004039410A
公开(公告)日：2004-02-05
申请号：JP2002194103
申请日：2002-07-03
申请人： Toshiba Corp , 株式会社東芝
发明人： KIKUCHI HIDEJI , HONMA MITSUTAKA , KAGARA HIROKI , SATO KAZUMASA , ISHIBASHI NAOYUKI , OTAKE SHIRO
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a vacuum circuit breaker capable of stabilizing the breaking performance and reducing the loss during energization in the vacuum circuit breaker with the use of a commutation device.
SOLUTION: The commutation device 10 is connected in parallel with a vacuum valve 11 of the vacuum circuit breaker. In this commutation device 10; a capacitor 12, a reactor 13, a commutation current starting switch 15, and a supersaturated reactor 16 are serially connected, and an arrester 14 to be a non-linear resistive element is connected in parallel with this series circuit as an energy absorbing device.
COPYRIGHT: (C)2004,JPO

33. 发明专利

JP2004014241A Dc breaker 审中-公开
公开(公告)号：JP2004014241A
公开(公告)日：2004-01-15
申请号：JP2002164756
申请日：2002-06-05
申请人： Shibafu Engineering Corp , Toshiba Corp , 株式会社東芝 , 芝府エンジニアリング株式会社
发明人： OSHIMA IWAO , FUNABASHI TAKUMI , KAMIKAWAJI TORU , HONMA MITSUTAKA , NAKAGAWA SATOSHI , SHIMADA KAZUTO , ITO TOMOYASU , OKUTOMI ISAO
IPC分类号： H01H33/59
摘要： PROBLEM TO BE SOLVED: To provide a DC breaker which has a simple configuration, can be repeatedly used, has no limitation on applied voltage, and has no need for special composing elements. SOLUTION: A capacitor Cc1 to nonvibrationally commutate/break a direct current and a switch SW1 are parallelly connected. COPYRIGHT: (C)2004,JPO

34. 发明专利

JP2002042616A VACUUM CIRCUIT-BREAKER 失效
公开(公告)号：JP2002042616A
公开(公告)日：2002-02-08
申请号：JP2000218293
申请日：2000-07-19
申请人： SHIBAFU ENGINEERING CORP , TOSHIBA CORP
发明人： OKUTOMI ISAO , KUSANO TAKASHI , HONMA MITSUTAKA , OSHIMA IWAO , YAMAMOTO ATSUSHI , SEKI KEISEI
IPC分类号： H01H11/04 , H01H1/02 , H01H1/025 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a vacuum circuit-breaker having the stabilized contact resistance characteristic and the excellent large current breaking characteristic. SOLUTION: In a Cu-Cr contact mounted on the vacuum circuit-breaker, a part of a contact surface area is formed of a first CuCr group formed of a plurality of Cr particles having the particle diameter >40 μm and Cu phase surrounding the particles, and a second CuCr group formed of a plurality of Cr particles having the particle diameter

35. 发明专利

JP2001143578A BREAKER OPERATION MECHANISM 失效
公开(公告)号：JP2001143578A
公开(公告)日：2001-05-25
申请号：JP32190499
申请日：1999-11-12
申请人： TOSHIBA CORP
发明人： MATSUO KAZUHIRO , FUJII KOICHI , WAKABAYASHI KOSEI , HONMA MITSUTAKA
IPC分类号： H01H33/40
摘要： PROBLEM TO BE SOLVED: To provide a breaker operation mechanism that maintains durability for frequent operations without enhancing the strength or capacity of the constituent parts. SOLUTION: This mechanism has a fixed frame for rotatably mounting a shaft 4A projected to fixedly mount an indication lever 6A, whose leading end is provided with displays 6a and 6b for respectively indicating the energy stored and discharged. The lever 6A has the central portion 6A with a vertical stopper 6c, whose lower end is arranged to abut on the pin 11 of the cam 3 to represent the stored energy state. If the spring 1 discharges the stored energy to rotate the cam 3, the pin 11 parts with the stopper 6c, so that the indication lever 6A has its leading end oscillating and descending to face the energy- discharged display 6b toward the indication hole.

36. 发明专利

JPH10255605A VACUUM VALVE 失效
公开(公告)号：JPH10255605A
公开(公告)日：1998-09-25
申请号：JP5332897
申请日：1997-03-07
申请人： TOSHIBA CORP
发明人： NIWA YOSHIMITSU , WATANABE KENJI , KAGENAGA NOBUKATA , UCHIYAMA YOSHIMI , SOMEI HIROMICHI , HONMA MITSUTAKA
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To prevent arc from concentrating to a center part of an electrode contact. SOLUTION: This vacuum valve contains a pair of electrode contacts 3 arranged so as to contact/remove them being fixed to each conductive rod 6, a radial member extending from the conductive rod 6 to a radius direction to the back of each electrode contact 3, a coil electrode 1 extending from an edge part at the radius direction of the above mentioned radial member to the peripheral direction consisting of a coil part 1a connected to each electrode contact 3. In this case, out of a space where is surrounded by the radial member of each coil electrode 1, above mentioned radial member, and the connected coil part 1a, a space surrounded by the above mentioned radial member and the coil part 1a through a surface from an area of electrode contact 3 side along with inside of the coil part 1a through an opposite side surface of the electrode contact 3 side of above mentioned radial member, ad a magnetic material body 2A integrated with an electrode contact 3 side area along with a center axis member 1 of the coil electrode 1 in a space peripherally adjacent to the space through the above mentioned radial member are arranged. A position corresponding to the circumference direction of the radial member of one coil electrode 1 is arranged so that is accords with the position of the radial member, of the opposing coil electrode 1.

37. 发明专利

JPH10199381A CIRCUIT BREAKER AND MANUFACTURE OF VACUUM BULB USED THEREFOR 失效
公开(公告)号：JPH10199381A
公开(公告)日：1998-07-31
申请号：JP378097
申请日：1997-01-13
申请人： TOSHIBA CORP
发明人： MATSUO KAZUHIRO , TAKIGAWA RIKA , KAWAGUCHI CHIYOMI , KAKARA HIROKI , HONMA MITSUTAKA , FURUYA FUMIO , MANIWA AKIRA
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To fill a fine air gap of a tightening part, increase a contact area, reduce an electric and thermal contact resistance, restrain heat generation, and improve thermal conductivity by applying a solvent having a specific conductivity on a bonding face of a main circuit current conducting member tightening part, tightening with a specific hardness or less, and drying, and hardening. SOLUTION: A clamp 6 connected to a flexible conductor 7 is dried and hardened after a solvent 9 having a conductivity below 10 Ωm or less in resistance is applied and hardness of the solvent 9 is 40Hv or less in the status of which the clamp is tightened to a movable contact conductive shaft 18 with bolts. Thereby, the hardened solvent 9 is filled in a gap at a screw contact part of both parties. In addition, this is performed similarly at a tightening part between a fixed contact conductive shaft and a conductive conductor. A conductive thin film of 50 micrometers or less in thickness and 40Hv or less in hardness may be employed in place of the solvent 9, and the main component of this thin film and the coating 9 is preferably Ag. Preferably, a movable contact conductive shaft 18 or the like is made of a copper material, and the coating 9 is made of a silver filler and a synthetic resin binder.

38. 发明专利

JPH10112246A VACUUM VALVE 失效
公开(公告)号：JPH10112246A
公开(公告)日：1998-04-28
申请号：JP26497496
申请日：1996-10-07
申请人： SHIBAFU ENG KK , TOSHIBA CORP
发明人： OKUTOMI ISAO , KAGENAGA YOSHIMASA , WATANABE KENJI , UCHIYAMA YOSHIMI , NIWA YOSHIMITSU , HONMA MITSUTAKA , SOMEI HIROMICHI , SEKI KEISEI , KUSANO TAKASHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To stabilize an arc by the generation of magnetic flux in an axial direction between the magnetic poles by using a magnetic body which does not have the shape of closed loop, so that the end parts thereof act as the magnetic poles, and further making a counter electrode generate the magnetic pole on the end part of the magnetic body. SOLUTION: Current-carrying rods 2 are fixed to a point of a current-carrying rod 1 on a circle, concentric with the current-carrying rod 1, and magnetic bodies 3 are respectively installed near the current-carrying rods 2. When electric current in a predetermined direction, is flowed to the current-carrying rods 2, a generated magnetic flux C is passed inside of the magnetic body 3, thereby both ends 3a, 3a of the magnetic body act as the magnetic poles of the polarities opposite to each other, because the magnetic body 3 is not a closed loop. Here, the current-carrying rods 2 and magnetic bodies 3 of the same shape are installed on a mutually facing electrode, thereby the different magnetic poles are generated, because the directions of the electric currents flowing in the current-carrying rods 2 are opposite to each other in the electrodes. Thereby the magnetic field in an axial direction is generated between the magnetic poles of the magnetic bodies opposite to each other. That is, the magnetic field in the axial direction can be generated with a simpler structure, in comparison with a vertical magnetic field coil.

39. 发明专利

JPH09320413A VACUUM BULB 失效
公开(公告)号：JPH09320413A
公开(公告)日：1997-12-12
申请号：JP14153196
申请日：1996-06-04
申请人： TOSHIBA CORP
发明人： KAGENAGA YOSHIMASA , WATANABE KENJI , UCHIYAMA NORIMI , SATO JUNICHI , KANEKO EIJI , HONMA MITSUTAKA , SOMEI HIROMICHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide the vacuum bulb which is small in size, and is functionally enhanced in isolation characteristics. SOLUTION: An energizing plate 5 is brazed with a stationary side energizing shaft 1A and the tip end of a movable side energizing shaft 1B. Magnetic pieces 3 in a U shape each are annularly disposed with respect to the front surface side of the energizing plate 5. A groove is formed at the adjacently contacting side of each magnetic piece 3, each energizing bar 2 is inserted into the groove, and the single side of each energizing bar 2 is brazed with the energizing plate 5. A contactor 4 is provided for the front surface sides of each energizing bar 2 and each magnetic piece 3, let a magnetic flux which is generated by electric current passing through each energizing bar 2 because of abrazing of the contactor with the respective energizing bars 2, and passes through each magnetic piece 3, pass through a space between the magnetic pieces 3 of both electrodes, so that a longitudinal magnetic field can thereby be provided.

40. 发明专利

JPH09306307A VACUUM VALVE 失效
公开(公告)号：JPH09306307A
公开(公告)日：1997-11-28
申请号：JP11901096
申请日：1996-05-14
申请人： SHIBAFU ENG KK , TOSHIBA CORP
发明人： OKUTOMI ISAO , UCHIYAMA YOSHIMI , WATANABE KENJI , KAGENAGA YOSHIMASA , SATO JUNICHI , KANEKO EIJI , HONMA MITSUTAKA , SOMEI HIROMICHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To further improve breaking performance by preventing the concentration of an arc caused by an eddy current flowing to a contact point. SOLUTION: A material in the same plane direction as a contact plane of a contact point 11A on the front end of a coil electrode is changed. On the outermost peripheral side, it is constituted in an annular shape by arc-shaped four contact point pieces 11a1 made of a copper material and arc-shaped four contact point pieces 11b1 made of copper-chrome alloy. Even on the inside of this annular shape, small arc-shaped contact point pieces made of copper- chrome alloy are arranged on the inner peripheral side of the contact point pieces 11a1, and small arc-shaped contact point pieces made of a copper material are arranged on the inner peripheral side of the contact point pieces 11b1. Fan-shaped small contact point pieces are respectively arranged on the further inner peripheral side of these, and loop resistance of an eddy current is increased.

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