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1. 发明专利

JP2003348721A Gas-blowing breaker 审中-公开
标题翻译：燃气断路器
公开(公告)号：JP2003348721A
公开(公告)日：2003-12-05
申请号：JP2002155953
申请日：2002-05-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TOKUYAMA SHUNJI , URAI HAJIME , OSHITA YOICHI , YANO MAKOTO
IPC分类号： H01H33/873 , H02B13/02 , H02B13/055
CPC分类号： H01H2033/566
摘要： PROBLEM TO BE SOLVED: To provide a gas-blowing breaker, capable of obtaining a disconnecting property equal to or higher than the case of using an SF 6 gas, using alternative gas as arc-extinguishing gas. SOLUTION: A gas-blowing disconnecting part 1 and a gas-blowing disconnecting part 2 are arranged in series between bushing terminals 24, an alternative gas that is superior in a BTF disconnecting property is sealed in the disconnecting part 1 as the arc-extinguishing gas; and alternative gas that is superior in an SLF disconnecting property is sealed in the disconnecting part 2 as the arc-extinguishing gas. Since the gas-blowing part 1 and the gas- blowing part 2 are electrically connected in series, the gas-blowing breaker is obtained, which is superior in both the SLF disconnecting property and the BTF disconnecting property and has the disconnecting property equal to or higher than the case using the SF 6 gas. The use of the alternative gas largely contributes to the prevention of global warming. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供一种能够获得等于或高于使用SF气体的情况的气体断路器，使用替代气体作为灭弧剂加油站。
解决方案：气体分离部1和气体吹出断开部2串联布置在衬套端子24之间，BTF断开性优异的替代气体被密封在断开部分1中作为弧灭火气体并且在断路部2中作为灭弧气体密封具有优异的SLF断开性的替代气体。由于气体吹出部分1和气体吹送部分2串联电连接，所以获得了吹气断路器，其在SLF断开连接性能和BTF断开性能方面均优异，并且具有等于或等于高于使用SF 6 气体的情况。替代气体的使用在很大程度上有助于预防全球变暖。版权所有（C）2004，JPO

2. 发明专利

JP2002075148A PUFFER TYPE GAS-BLAST CIRCUIT BREAKER 失效
公开(公告)号：JP2002075148A
公开(公告)日：2002-03-15
申请号：JP2000263534
申请日：2000-08-31
申请人： HITACHI LTD
发明人： MINAMI NAOKI , TOKUYAMA SHUNJI , URAI HAJIME , OSHITA YOICHI , YANO MAKOTO
IPC分类号： H01H33/915 , H01H33/70
摘要： PROBLEM TO BE SOLVED: To provide a puffer type gas-blast circuit breaker, operating with low operating force and exerting proper shut-off performance, not only in the case of small current of several hundred amperes but also in the case of a large current of tens of thousands of amperes. SOLUTION: The puffer type gas-blast circuit breaker has a stationary arc contact, a movable arc contact brought into contact with/separated from the stationary arc contact, a first piston installed on the side of the movable arc contact and reciprocating relative to a first cylinder within the cylinder, a second piston coupled to the movable arc contact and reciprocating relative to a second cylinder within the cylinder, a hole for the first cylinder, which is formed in the first cylinder and enables the effluence of arc-extinguishing bas blown upon an arc generating part for generating an arc when the stationary arc contacts are opened and separated from each other, and a communication passage for allowing the arc generating part to communicating with the inside of the second cylinder. The circuit breaker is provided characteristically with a pressure response valve for opening/closing the communication passage, according to the gas pressure of the arc-generating part.

3. 发明专利

JPH09231885A GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH09231885A
公开(公告)日：1997-09-05
申请号：JP3474496
申请日：1996-02-22
申请人： HITACHI LTD
发明人： YAGINUMA NORIYUKI , TSUKUSHI MASANORI , YANO MAKOTO , SHIRAISHI KATSUHIKO , OSHITA YOICHI
IPC分类号： H01H33/78 , H01H33/74
摘要： PROBLEM TO BE SOLVED: To provide a gas-blast circuit-breaker with small size, high electrode- to-electrode insulation recovering performance in current breaking, and high insulation to the earth performance. SOLUTION: Gas generating in current breaking is exhausted to the inside of an exhaust tube structure part 1 through a communicating port 8 formed in a fixed side supporting member 6 combined with a fixed arc contact 4 or the like. A flow path cross section enlargement part of the exhaust tube structure part 1 to the exhaust tube flow path cross section S1 in the connecting part with the fixed side supporting member 6 is arranged in front of the position at least 1/2 the total length of the exhaust tube structure part 1, and uniformly enlarged toward the rear of the exhaust tube structure part 1. As a result, gas is quickly exhausted to the inside of the exhaust tube structure part 1, and an electrode-to-electrode insulation recovering characteristic is enhanced. In the case that the exhaust tube structure part 1 is constituted with a plurality of exhaust tubes and a plurality of members and an exhaust tube in the final part 17 is constituted with an insulator, the electric field concentration in the exhaust tube end part is suppressed, and the whole gas-blast circuit-breaker is made small.

4. 发明专利

JPH09215136A GAS-BLAST CIRCUIT BREAKER 失效
公开(公告)号：JPH09215136A
公开(公告)日：1997-08-15
申请号：JP2395696
申请日：1996-02-09
申请人： HITACHI LTD
发明人： UCHIUMI TOMOAKI , NUKAGA ATSUSHI , OSHITA YOICHI , DAIMON GORO , TSUCHIYA KENJI , YOSHIMOTO HIROSHI
IPC分类号： H02B13/02 , H01H33/24 , H01H33/53
摘要： PROBLEM TO BE SOLVED: To provide a gas-blast circuit breaker which is not large in size and which hardly peels off or is damaged even if a mechanical shock is given to shields. SOLUTION: A gas-blast circuit breaker is provided with a metallic container 10 which is filled with insulating gas, a first and a second contactor 1, 2 which are placed in the metallic container and which separably located face to face with each other, and metallic shields 5a, 5b which are so located as to surround the contactors 1, 2. In this gas-blast circuit breaker, a part or the entire part of the surfaces of the shields 5a, 5b are oxidation-treated 7a, 7b and Teflon film layers are formed on the oxidation-treated surfaces.

5. 发明专利

JPH099433A GAS INSULATED SWITCHGEAR AND TRANSFORMER STATION USING THIS DEVICE 失效
公开(公告)号：JPH099433A
公开(公告)日：1997-01-10
申请号：JP15296695
申请日：1995-06-20
申请人： HITACHI LTD
发明人： TSUKUSHI MASANORI , OSHITA YOICHI , NATSUI KENICHI , KAMATA YUZURU
IPC分类号： H02B7/08 , H02B13/02
摘要： PURPOSE: To allow a transformer station to be constructed with a degree of freedom by locating a plurality of breakers that have an aspect ratio of a specified value or above on the same side about a main bus. CONSTITUTION: Main buses 5A, 5B are three-phase one-wire buses. Between the main buses 5A and 5B, vertical gas breakers (GCB) are arranged in line. At that time, the arrangement length is longer than the length they cross at right angles with the main buses 5A, 5B in a projected figure on a floor face. The GCB's are located in the order of the GCB for line 3, the GCB for linkage with the buses 9, and the GCB for transformer 6. Connections 10A, 10B between these GCB's are installed in parallel with the main buses 5A, 5B. When the GCB's 3, 9, 6 are three phase one-wire GCB's, the length per line of the GCB's 3, 9, 6 toward the main buses 5A, 5B is short and thereby the aspect ratio per line is 2 or more and smaller than a three-phase three-wire type. Therefore, a transformer station can be built up in a long and narrow belt-like structure.

6. 发明专利

JPH06213979A SYNTHETIC TEST METHOD FOR POWER SWITCH 失效
公开(公告)号：JPH06213979A
公开(公告)日：1994-08-05
申请号：JP643193
申请日：1993-01-19
申请人： HITACHI LTD
发明人： OSHITA YOICHI , KUROSAWA YUKIO , SATO MINORU
IPC分类号： G01R31/327 , G01R31/333 , G01R31/32
摘要： PURPOSE:To compensate waveform distortion due to arc voltage of cut-off current and exactly evaluate original break performance even at a large capacity breaker by connecting other reactor in series for changing the value of a reactor for current limiting which is inserted in a current source circuit. CONSTITUTION:In series of a reactor 51 in a current source circuit, a series circuit of a reactor 52 and closing switch 53 is connected and when there is no arc voltage of a breaker, the reactor 51 is controlled so as to be able to send a predetermined current. When a breaking current is sent and a tested breaker is opened, arc voltage increases with electrode distance and the distortion of the actual break current from a desired waveform becomes large in the final current half wave immediately before the completion of the cutting. If a switch 53 is closed immediately before the final half wave to reduce the value of the reactor 51 for current limiting, the breaking current waveform can be roughly adjusted to the desired waveform. Even for performance test of a large capacity breaker, the break performance of an original breaker can be exactly evaluated by this.

7. 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.

8. 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.

9. 发明专利

JPH0576136A POWER SUPPLY SYSTEM 失效
公开(公告)号：JPH0576136A
公开(公告)日：1993-03-26
申请号：JP23440791
申请日：1991-09-13
申请人： HITACHI LTD
发明人： KUROSAWA YUKIO , OSHITA YOICHI , WATANABE MASARU , NISHIDA ISAO , ASAI YOSHITO , YAMAGIWA TOKIO
IPC分类号： H02H7/22 , H02H9/00 , H02H9/04
摘要： PURPOSE:To obtain a highly reliable current supply system, in which overvoltage can be suppressed drastically, by disposing an overvoltage suppressor comprising a switching means and an impedance between the bus side or the transmission line side or the both sides of a circuit breaker and the ground. CONSTITUTION:Resistors 8a, 8b are provided through switches 7a, 7b between a main circuit connecting circuit breakers 3a, 3b and transmission lines 2a, 2b and the ground thus constituting an overvoltage suppressor. When the circuit breaker functions, the resistor 8b is inserted between a sound line and the ground and the resistor 8a is connected with a fault line. Consequently, transient oscillation on the power supply side is damped through the resistor 8b connected with the sound transmission line thus lowering the amplitude. Reciprocal oscillation of voltage in the sound transmission line is also damped. Reciprocal reflective oscillation on the side of fault transmission line is damped through the resistor 8a and the voltage to be induced in the fault transmission line by the reciprocal oscillation voltage is suppressed. According to the invention, ground fault interrupting surge is suppressed drastically as compared with conventional one.

10. 发明专利

JPH0280980A CURRENT SUPPLY ABNORMALITY DETECTOR OF GAS INSULATING SWITCHING MACHINERY 失效
公开(公告)号：JPH0280980A
公开(公告)日：1990-03-22
申请号：JP23246988
申请日：1988-09-19
申请人： HITACHI LTD
发明人： OSHITA YOICHI , HASHIMOTO TAKESHI , KUROSAWA YUKIO , YAMAGIWA TOKIO
IPC分类号： G01R31/02 , H02B13/065 , H02H5/00
摘要： PURPOSE:To prevent an serious accident by detecting the abnormality of current supply by arranging a current supply abnormality detector consisting of a vibration sensor, a preamplifier, a transmission part and a judge part to machinery to be detected for detecting the abnormality of current supply generated in a conductor connection part. CONSTITUTION:A vibration sensor 2 as a vibration detection means is arranged to the outer wall of a tank 3 of a current supply abnormality detector and the output signal of the vibration sensor 2 is sent to a frequency analyser 14 through a cable 11, a preamplifier 12 and a cable 13. The measuring result converted on a frequency axis by the frequency analyser 14 is sent to an abnormality judge device 16 as a digital signal by a transmission means such as GPIB through a cable 15. In the abnormality judge device 16, it is judged whether a sharp peak is present within a set frequency band and a peak value exceeds a preset judge reference value and, when these conditions are satisfied, an abnormal alarm is issued.

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