公开(公告)号：JPH0819135A

公开(公告)日：1996-01-19

申请号：JP14586994

申请日：1994-06-28

Applicant: TOSHIBA CORP

Inventor： MATSUMOTO SATOSHI ,  HIOKI ISAO

IPC: H02B13/075

Abstract: PURPOSE:To suppress overvoltage generated according to operating a switch, by grounding any one of electrodes through an insulating member and a conductor supported to a ground vessel, and connecting this conductor to the ground vessel through a prescribed impedance circuit element. CONSTITUTION:An impedance circuit element 15 is interposed between a vessel 1 and an insulator 11, and the element is inserted between the vessel 1 and a supporting electrode 17 having an equal potential. A conductor 10 is grounded through a ground wire 12. Thus by enabling loop impedance, which is a cause of overvoltage, to reduce, overvoltage generated in the insulator 11 can be suppressed, and creeping dielectric breakdown of the insulator 11 can be prevented before occurrence. By decreasing also a level of generated surge, induction to a peripheral equipment can be suppressed, and equipment malfunction and damage can be prevented.

公开(公告)号：JPH06176666A

公开(公告)日：1994-06-24

申请号：JP32580192

申请日：1992-12-04

Applicant: TOSHIBA CORP

Inventor： HIOKI ISAO

IPC: H01H33/40

Abstract: PURPOSE:To enhance safety by eliminating the danger of closing a ground switch by mistake during normal operation and to simplify the constitution of the ground switch. CONSTITUTION:An eccentric disc cam 8 abutting to a closing lever 6 and a crescent cam 10 that can abut to an opening lever 9 are secured to the respective portions of a cam shaft 7. The eccentric disc cam 8 is so designed that while the cam shaft 7 is being turned the closing lever 6 is turned in the direction in which a closing spring 4 is pressed, and that when the closing spring 4 is released the cam shaft 7 is turned in the same direction as when the closing spring 4 is pressed. The crescent cam 10 is so designed that when the closing spring 4 is released the opening lever 9 is turned in the direction in which an opening spring is pressed, and that when the opening spring 5 is released the cam 10 does not make contact with the opening lever 9.

公开(公告)号：JPH0594745A

公开(公告)日：1993-04-16

申请号：JP25245891

申请日：1991-09-30

Applicant: TOSHIBA CORP

Inventor： HIOKI ISAO

IPC: H01H33/91

Abstract: PURPOSE:To provide a puffer-type small gas circuit breaker by which high circuit breaking performance can be obtained by means of small driving energy by leveling off puffer chamber inside gas pressure different in the magnitude of arc energy in the case of BTF breaking and in the case of SLF breaking. CONSTITUTION:Contact shoe parts 1 and 2 capable of contacting with/separating from each other are provided in a container filled with arc/extinguishing gas. A puffer chamber 11 composed of a piston 7 and a cylinder 6 is compressed, and the compressed gas is introduced to a nozzle 10 part, and the arc 14 generated between arc contact shoes 4 and 8 is extinguished. A communicating hole 5a is provided in a driving rod 5 to drive a movable part. Plural number of partition 12 to divide a hollow part area equally into a radial shape are provided in a conical shape on the opposite side of the movable arc contact shoe 8 in the vicinity of the communicating hole 5a. Bases of the partition 12 are fixed to the inner wall of the driving rod 5 through a bimetallic member 13 having a low expansion member 13a and a high expansion member 13b.

公开(公告)号：JP2008171768A

公开(公告)日：2008-07-24

申请号：JP2007006040

申请日：2007-01-15

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： UCHII TOSHIYUKI ,  HIOKI ISAO

IPC: H01H33/70 ,  H01H33/74 ,  H01H33/91

Abstract: PROBLEM TO BE SOLVED: To provide a gas-blast circuit breaker capable of easily aligning the axes of both contactors and securing high insulation even it is small in size.
SOLUTION: The gas-blast circuit breaker has a movable contactor part 3 and an axis fixed in an aligned state by an insulating cylinder 12 being a cylindrical insulator, and an opening part 22 is provided at the side face at the lower side of the insulating cylinder 12. The opening angle Q of the opening part 22 to the circumference direction of the insulating cylinder 12 is made 60° or more, and the length L (m) in axial direction of the opening part 22 is made to be [4×10
-8 ×U] or more when the maximum DC voltage that can be impressed between both contactor parts is made U (V). Furthermore, the fringe 23 of the opening part is formed round and smooth without making it square and angular.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够容易地对准两个接触器的轴线并确保高绝缘性的气体断路器，即使其尺寸小。 解决方案：气体断路器具有可动接触器部分3和通过作为圆柱形绝缘体的绝缘圆筒12以对准状态固定的轴线，并且在下侧的侧面设置有开口部分22 开口部22与绝缘筒12的圆周方向的开口角度θ为60°以上，开口部22的轴向长度L（m）为 当在两个接触器部件之间施加的最大直流电压为U（V）时，[4×10 -8 ×U]以上。 此外，开口部的边缘23形成为圆形且平滑，而不使其成正方形和有角度。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JPH07105800A

公开(公告)日：1995-04-21

申请号：JP25302693

申请日：1993-10-08

Applicant: TOSHIBA CORP

Inventor： MIZOGUCHI HITOSHI ,  HIOKI ISAO ,  YOKOTA TAKASHI

IPC: H01H33/91 ,  H02B13/075

Abstract: PURPOSE:To provide a compact and economical high speed reclosing and earthin switchgear which can shut induced current in high voltage power transmission cable wherein the induced current does not form zero point during several cycles. CONSTITUTION:A puffer cylinder 16 is isntalled in a cylindrical operational rod 15 which is to be connected with an operational apparatus. A movable contactor 17 and a nozzle 18 are isntalled above the puffer cylinder 16. A puffer piston 19 is inserted in the puffer cylinder 16. A gas compressing chamber C is composed of the puffer cylinder 16 and the puffer piston 19. A movable contactor part B is supported in the operational rod 15 by supporting parts 19a, 19b. A floating piston 20 which slides on the inner face of the puffer cylinder 16 and the smaller diameter part of the puffer cylinder 19 is installed in the rear side of the puffer piston 19 to compose an auxiliary capacity part D. A spring 2 to reinforce the floating piston in the direction to the contactor is installed. A communication hole 19c to communicate the gas compressing chamber C and the auxiliary capacity part D is formed in the puffer piston 19.

公开(公告)号：JPH02132721A

公开(公告)日：1990-05-22

申请号：JP28384288

申请日：1988-11-11

Applicant: TOSHIBA CORP

Inventor： HIOKI ISAO ,  TOYODA MITSURU

IPC: H01H33/70 ,  H01H33/915

Abstract: PURPOSE:To enhance voltage resistance by arranging a plurality of embedded fittings connected to a high-voltage electrode at least on a high voltage side at one end of an insulating cylinder, connecting an inner shield to the embedded fitting, and providing each outer diameter of both ends of the cylinder smaller than that of the cylinder connecting portion of the electrode. CONSTITUTION:At both ends of an insulating cylinder 20, a movable portion supporter 2 or a fixed portion supporter 10 and a plurality of embedded fittings 14 for fastening bolts are arranged, respectively. A cylindrical inner shield 21 is integrally formed around the tip of the fitting 14. In addition, at both ends of the cylinder 20, small diameter portions 24 are formed, the diameter D2 of which is smaller than the outer diameter of the cylinder 20. Accordingly, the electric field of the tip of the fitting 14 is released by the shield 21, and further, the electric field of a contact surface between the cylinder 20 and the connecting member of a high-voltage electrode is released over the whole insulating cylinder by a synthetic shielding effect of the shield 21 and the connecting member by itself. Therefore, voltage resistance can be enhanced.

公开(公告)号：JPH01255409A

公开(公告)日：1989-10-12

申请号：JP8142188

申请日：1988-04-04

Applicant: TOSHIBA CORP

Inventor： HIOKI ISAO ,  SANADA YASUNORI ,  SUGANO YOSHIHIRO

IPC: H02B13/02

Abstract: PURPOSE:To improve maintenability and safety of circuit breakers and to make them small-sized, by housing earth switches for the maintenance of breakers in the units on bus bar sides. CONSTITUTION:Moving pieces of disconnectors 14a and 14b of the 1st and 2nd bus bar sides are connected to three-phase main bus bars 13a and 13b provided horizontally at right angle to the axis of a circuit breaker container 6. The stators of disconnectors 14a and 14b on bus bar sides are connected to circuit breaker connecting terminal sections 17a and 17b on bus bar sides after they are passed through earth switches 30a and 30b for maintenance, of which stators are provided on the conductor in the extending direction of the stators for disconnectors 14a and 14b on bus bar sides. Moving pieces are arranged which move horizontally to the stators and come into contact with the abovementioned stators. After the breaker 6 is removed, the earth switches 30a and 30b for the maintenance of breakers are left in the units on bus bar sides and the disconnectors 14a and 14b become earthed, so that there will be no danger of electric shock at work.

公开(公告)号：JPH0836954A

公开(公告)日：1996-02-06

申请号：JP17437794

申请日：1994-07-26

Applicant: KANSAI ELECTRIC POWER CO ,  SHIKOKU ELEC POWER ,  ELECTRIC POWER DEV CO ,  TOSHIBA CORP

Inventor： TAKEJI NAOAKI ,  TAKAHATA KOJI ,  HATANO MASAYUKI ,  MATSUSHITA KOZO ,  HIOKI ISAO ,  INOUE KENICHI ,  KOSHIZUKA TADASHI

IPC: H02B13/02 ,  H01H33/66

Abstract: PURPOSE:To generate a high arc voltage and an excellent breaking performance required for a commutating switch using a simple configuration. CONSTITUTION:Three composite tank type switches 20a-20c are furnished in which three breaking parts 22a-22c are accommodated, and are connected serially through branches 24a-24c furnished in their upper and lower parts. The breaking parts 22a-22c of these switches 20a-20c are opened while shifted in the time at intervals of 15-20ms.

公开(公告)号：JPH07193926A

公开(公告)日：1995-07-28

申请号：JP33714993

申请日：1993-12-28

Applicant: TOSHIBA CORP

Inventor： NISHIZAWA AKIRA ,  AKIMOTO KENJI ,  MINEYAMA TAKAYA ,  NAGATOMO HIDEO ,  TOYODA MITSURU ,  HIOKI ISAO

IPC: H02B13/02

Abstract: PURPOSE:To provide a gas insulated switchgear excellent in economy and the size thereof can be reduced while enhancing the workability in the maintenance/ inspection of the circuit breaker and the operating mechanism thereof. CONSTITUTION:Two bus side disconnectors 13, 14 are disposed between a pair of main buses 11, 12 and three circuit breakers 15-17 are disposed therebetween. Central disconnectors are disposed between respective circuit breakers and an operating mechanism for driving the circuit breaker is housed in a mechanism box for a three-phase circuit with the peripheral surface thereof being shifted from that of a mechanism box for other phase. This structure provides a sufficient space around the mechanism box thus facilitating the maintenance/ inspection of the operating mechanism. Furthermore, the phase spacing can be shortened significantly by arranging the instrument transformer and current transformer having large outer diameter while shifting for each phase.

公开(公告)号：JPH0698423A

公开(公告)日：1994-04-08

申请号：JP24247192

申请日：1992-09-11

Applicant: TOSHIBA CORP

Inventor： HIOKI ISAO

IPC: H02B1/16 ,  H02B13/02 ,  H02B13/075

Abstract: PURPOSE:To secure excellent property of safety and reliability by a method wherein miniaturization and simplification of constitution are contrived and faulty throwing of an earth switch is prevented during ordinary operation. CONSTITUTION:This device is equipped with a liquid pressure cylinder 3 for opening and/or closing an earth switch 2, a pressure fluid supplying device 4 having a cylindrical body 9 and a low pressure tank 5. Two pieces of pistons 10, 11 connected together are mounted slidably in the cylindrical body 9. A liquid pressure fluid chamber 14 is provided between the piston 11 connected to a breaker operating unit and the closing end of the cylindrical body 9, a first valve 20, opened when the liquid pressure in the liquid pressure fluid chamber 14 has exceeded a predetermined pressure, is provided between the liquid pressure fluid chamber 14 and the liquid pressure cylinder 3 while a second valve 21, opened when the liquid pressure in the liquid pressure fluid chamber 14 has been reduced than an atmospheric pressure, is provided between the liquid pressure fluid chamber and a low-pressure tank 5.