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1. 发明专利

JPH1097354A UNINTERRUPTIBLE POWER SOURCE CONNECTING METHOD 失效
公开(公告)号：JPH1097354A
公开(公告)日：1998-04-14
申请号：JP25269896
申请日：1996-09-25
申请人： HITACHI LTD , HITACHI INFORMATION TECHNOLOGY
发明人： KOYANAGI OSAMU , FUJIMURA ATSUSHI , MORITA KAZUO
IPC分类号： G06F1/26 , G06F1/30 , H02J7/34 , H02J9/00
摘要： PROBLEM TO BE SOLVED: To guarantee the saving time for application, etc., by starting a saving process for the execution state of the application, etc., on receiving a power failure detection output signal from a 1st UPS(uninterruptible power unit) in case of a power failure, and then starting a forcible shutdown process on receiv ing a power failure detection output signal from a final UPS unless the power supply recovers. SOLUTION: When the AC power source of a UPS 101 is turned OFF, UPSs 101 to 103 start backup processes by a battery 108. Once, however, the UPS 101 starts the backup process, the UPSs 102 and 103 are supplied with electric power, so the backup process is quit. A system control part 105 recognizes the power failure and saves the execution states of application programs, etc. Then when a power failure state is entered again a backup time later and the final UPS starts the backup process, the saving process for the power failure is not completed, so the device 104 forcibly performs the shutdown process.

2. 发明专利

JPH08129942A BUFFER TYPE GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH08129942A
公开(公告)日：1996-05-21
申请号：JP26484094
申请日：1994-10-28
申请人： HITACHI LTD
发明人： MIZUFUNE EISAKU , NATSUI KENICHI , KUROSAWA YUKIO , DAIMON GORO , ASAI YOSHITO , KASHIMURA KATSUICHI , KOYANAGI OSAMU , ISHIKAWA KOJI
IPC分类号： H01H33/91 , H01H9/52 , H01H33/16 , H01H33/915
摘要： PURPOSE: To restrain the transient temperature rise of a magnetic substance as well as to reduce the raising ratio of transient restore voltage between breaker electrodes, so as to improve breaking performance, by providing the magnetic substance so as to surround a fixed conductor and arranging it downstream from an insulating member. CONSTITUTION: A magnetic substance 13 is so provided as to surround a fixed conductor 19 for electrically connecting a fixed arc contact 9 to a main bus conductor 7b. This conductor 19 is fixed to an insulating layer cylinder 3b fixed to an insulating member 14 and an earth tank 1, and the conductor 19, the contact base 11 and the tank 1 are electrically insulated, a body 13 is arranged downstream from a member 14a. Since the body 13 is effectively excited by breaking current, the self inductance of the body 13 is increased just before the zero point of the breaking current, and the breaking current change ratio is decreased. The body 13 is not directly exposed to the high-temperature exhaust gas of an insulating nozzle 8 by a partition of the member 14a. Accordingly, the transient restore voltage raising ratio between breaker electrodes is decreased, and the breaking capacity of the breaking part is equivalently increased, so as to improve breaking performance.

3. 发明专利

JPH07163037A BUS CONNECTOR 失效
公开(公告)号：JPH07163037A
公开(公告)日：1995-06-23
申请号：JP30769593
申请日：1993-12-08
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , HIRASAWA KUNIO , SATO MINORU , TSUKUSHI MASANORI
IPC分类号： H02G5/08
摘要： PURPOSE:To miniaturize and shrink a bus vessel while facilitating assembly by displacing the positions of each connecting section in a plurality of buses in the longitudinal direction of the buses. CONSTITUTION:The places of the connecting sections 10, 11, 12 of three-phase buses 7, 8, 9 supported to bus vessels 1, 2 by insulating post spacers 6 are displaced relatively in the longitudinal direction of the buses 7, 8, 9. That is, the positions of the connecting sections 10, 11, 12, to which electric fields are easier to concentrate than the buses 7, 8, 9, are displaced relatively in the longitudinal direction, thus relaxing the electric fields among each connecting section 10, 11, 12. A flange section 13 dividing the vessels 1, 2 is mounted within a range that the connecting sections 10, 11, 12 are placed, thus facilitating the visual inspection of the appearance, etc., of the connecting sections 10, 11, 12 from the outside of the flange section 13 at the time of assembly. Accordingly, a distance between a pair of the vessels 1, 2 and an interphase distance are shortened that is, the bus vessels 1, 2 can be miniaturized and shrunk-while assembly can be facilitated.

4. 发明专利

JPH05225862A PUFFER TYPE GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH05225862A
公开(公告)日：1993-09-03
申请号：JP3037392
申请日：1992-02-18
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , TSUKUSHI MASANORI , KASHIMURA KATSUICHI , OSHITA YOICHI , SEKI YASUHARU , KUROSAWA YUKIO
IPC分类号： H01H33/04 , H01H33/70 , H01H33/91
摘要： PURPOSE:To improve the breaking performance of a puffer type gas-blast circuit-breaker and also to prevent lowering the insulating performance thereof by forming a gap in an insulating nozzle or the like in contact with a commutating member in such a manner that a downstream portion against an upstream portion on the side of a puffer cylinder may be enlarged. CONSTITUTION:A puffer type gas-blast circuit-breaker has a puffer chamber 3 formed by a puffer cylinder l and a stationary piston 2, and the puffer cylinder 1 is fitted with a mover 4, an insulating nozzle 5 and a cover 6 respectively. The puffer cylinder 1 is provided with also a stator 7 which can make and break contact with the mover 4. The puffer cylinder 1 has plural air supply ports 9 communicating with a flow passage 8 which is formed between the insulating nozzle 5 and the cover 6 arranged on the circumference of a circle being described by the air supply ports. Furthermore, the flow passage 8 is provided with a commutating member 5a which is formed in one united body with the insulating nozzle 5 and is set in a position without the air supply port 9. A gap 5b is formed between the commutating member 5a and the cover 6 in such a manner that a downstream portion against an upstream portion on the side of the puffer cylinder 1 may be enlarged.

5. 发明专利

JPH0581972A GROUND TANK TYPE GAS-BLAST CIRCUIT BREAKER 失效
公开(公告)号：JPH0581972A
公开(公告)日：1993-04-02
申请号：JP24172191
申请日：1991-09-20
申请人： HITACHI LTD
发明人： KASHIMURA KATSUICHI , OSHITA YOICHI , KUROSAWA YUKIO , MATSUMOTO MORIHISA , KOYANAGI OSAMU , ISHIKAWA KOJI
IPC分类号： H01H33/53 , H01H33/70
摘要： PURPOSE:To stably fix the element of a resistance body, reduce the mechanical load of an insulating space, enhance economic property, and improve reliability by arranging the resistance body in vertical form, and supporting its weight by an insulating material just under. CONSTITUTION:A lower tank 20 is provided in the part corresponding to a fixed side conductor 7 of an interrupting part tank 1, an insulating support cylinder 21 is erected from the base, and a resistance body 12 is provided on the upper part thereof. The resistance body 12 is turned up in U-shape almost orthogonally to the shaft of a main interrupting part 2 with one end thereof being connected to a resistance contact part 3, and the other end to the conductor 7. Thus, the resistance body 12 is arranged in vertical form, and supported from the ground side by the cylinder 21, whereby the most stable supporting method is provided, and the whole length of the tank 1 can be shortened. Namely, since the resistance body 12 can be efficiently provided, the capacity of the tank 1 can be contracted, and the mechanical stress to an insulating spacer 4 is extremely minimized, so that the reliability of a circuit breaker can be improved.

6. 发明专利

JPH0436917A GAS BLAST CIRCUIT BREAKER 失效
公开(公告)号：JPH0436917A
公开(公告)日：1992-02-06
申请号：JP14138490
申请日：1990-06-01
申请人： HITACHI LTD
发明人： SEKI YASUHARU , TSUKUSHI MASANORI , KOYANAGI OSAMU
IPC分类号： H01H33/70 , H01H33/915
摘要： PURPOSE:To make gas heating with arcs in the normal breaking process by furnishing a storage chamber at the periphery of a puffer chamber, putting the storage chamber in communication with the movable side gas flow path, and boosting in advance the gas pressure at the time of circuitry breaking in this storage chamber by means of feeding the exhaust hot gas on the movable side. CONSTITUTION:The gas in a buffer chamber 6 with the gas pressure boosted by breaking motion is blown to the arc 16 generated between a stationary piece 1 and a moving piece 2. Then the gas stream diverges in two ways, i.e. on the stationary piece 1 side and the gas flow path 8 side, to generate so-called double flow. Gas heating due to the arc 16 is applied to the gas stream (a) on the gas flow path 8 side, and the gas pressure in the storage chamber 7 is going to be boosted. Then the tripping motion is ended, and gas blowing from the buffer chamber does not exist any more. However, the gas pressure in the storage chamber 7 has been boosted in the preceding processes, and now a gas stream (b) is generated from the storage chamber 7 to the stationary piece 1 side. Even though arcs are continued due to multiple lightning, a suffi cient blowing for circuitry breaking will be obtained.

7. 发明专利

JPH03269924A GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH03269924A
公开(公告)日：1991-12-02
申请号：JP6706790
申请日：1990-03-19
申请人： HITACHI LTD
发明人： SEKI YASUHARU , KOYANAGI OSAMU , TSUKUSHI MASANORI
IPC分类号： H01H33/91 , H01H33/915
摘要： PURPOSE:To protect a gas flowing route, to prevent arc deflection, to make gas blow uniform and to improve circuit-breaking function, by forming a projected part in a branching part of a gas flowing route in a movable side using an arc-resistant material. CONSTITUTION:In a circuit-shutting initial stage, an open part 8 is closed by a gas-discharging guide 19 and in the middle stage, an arc reaches an open part 12 of a supporting part 27 and becomes double flows. At that time, a projected part 28 made of an arc-resistant material, e.g. Cu-W, is formed in a gas flowing route 30, so that an arc 4 generated between a fixed contactor 3 and a movable contactor 2 moves backward owing to the gas flow of a hollow nozzle 7 and transfers to the projected part 28. Deflection of the arc is thus eliminated and gas blow to the arc can be made uniform. Also, the branching part 30 where the gas flow changes the direction in the gas flowing route 14 is protected from high temperature gas.

8. 发明专利

JPH03219516A BUFFER-TYPE GAS CIRCUIT-BREAKER 失效
公开(公告)号：JPH03219516A
公开(公告)日：1991-09-26
申请号：JP30244190
申请日：1990-11-09
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , TSUKUSHI MASANORI , SEKI YASUHARU , KUROSAWA YUKIO
IPC分类号： H01H33/915
摘要： PURPOSE:To improve gas blowing efficiency and circuit-breaking property by installing current rectifying part, increasing the surface area of a flow passage in the vicinity of the flow passage curving part, and suppressing temperature increase in the vicinity of arc generating part. CONSTITUTION:When a movable contactor 6 is parted from a fixed contactor 5, arc-extinguishing gas in a buffer chamber 3 is compressed and jetted out of a gas supplying inlet 4 formed in a buffer cylinder 1. The arc-extinguishing gas is led to the contactors 5, 6 through a flow passage 3a composed of an insulated nozzle 7, a cover 8 surrounding the contactor 6, and a current rectifying part 8a. A flow passage curving part 7b of the flow passage 3a is also formed on the upper stream side on a sprayed side from a throat part 7a on the inside face of the nozzle 7. A flow passage area increasing part is formed between the curving part 7b and the separated contact parts 5, 6 and the temperature increase in the vicinity of the arc generating part is suppressed.

9. 发明专利

JPH03205724A GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH03205724A
公开(公告)日：1991-09-09
申请号：JP55290
申请日：1990-01-08
申请人： HITACHI LTD
发明人： SEKI YASUHARU , TSUKUSHI MASANORI , KOYANAGI OSAMU
IPC分类号： H01H33/91 , H01H33/98
摘要： PURPOSE:To improve a large current shutting function without degrading a small current shutting function by setting a sucking chamber and a gas space in a lower flow side to be connected directly each other when the gas pressure of the sucking chamber becomes at least a certain value not like an indirect connection such as a non-return valve. CONSTITUTION:A piston 19 moves sequentially with a mover 16 and reciprocally on the same shaft owing to the gas pressure of a sucking chamber 9 and an elastic means, and when the gas pressure of the sucking chamber 9 rises at least a prescribed value, it moves toward circuit-breaking direction and the sucking chamber 9 and a gas space in the lower flow side are connected each other quickly. In the case of large current shutting, SF6 gas in a heating chamber 3 is heated and pressured and high pressure gas in the heating chamber 3 flows to the sucking chamber 9. The gas pressure of the sucking chamber 9 defeats the spring 11 and a floating piston 19 starts to work and moves to the stopper side 14, and the sucking chamber 9 and the gas space in the lower flow side are connected quickly and the gas in the sucking chamber is released. Consequently, gas blowing to an arc is not disturbed at the large circuit shutting time, and sucking and heat puffer-type circuit-breaking with good shutting ability is obtained.

10. 发明专利

JPH03205723A GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH03205723A
公开(公告)日：1991-09-09
申请号：JP53590
申请日：1990-01-08
申请人： HITACHI LTD
发明人： SEKI YASUHARU , KOYANAGI OSAMU , TSUKUSHI MASANORI
IPC分类号： H01H33/98
摘要： PURPOSE:To compose a heat puffer-type circuit-breaking part in a double flow way having a large current shutting function by composing a circuit-breaker in which functions of switching a gas discharging outlet and pressure operation are separated and carrying out the pressure operation by gas pressure of a heating chamber. CONSTITUTION:A heat puffer-type circuit-breaking part is composed of a cylinder 12, a mover 3, a nozzle 1, etc., a gas-discharging outlet 6 of a gas discharging route 5 is formed in the side platen of an auxiliary cylinder 14, a switching guide 7 to stop the gas discharging outlet 6 up to the position of shutting operation is installed, and the switching guide 7 moves sequentially with a pressure operating part 8 installed in a heating chamber 4 and normally stops the gas- discharging outlet 6 with a spring 9. That is, two functions of switching the gas-discharging outlet 6 and operation by gas pressure of the heating chamber are separated and thus a double flow-type heat puffer circuit-breaking part with stable outlet opening property is obtained. In this way, a heat puffer-type circuit-breaking part with an excellent large current shutting function can be composed.

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