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    • 2. 发明专利
    • VACUUM TRIGGER GAP
    • JPS6481185A
    • 1989-03-27
    • JP23718487
    • 1987-09-24
    • HITACHI LTD
    • SUZUKI KOJIARITA HIROSHITOKUYAMA SHUNJIKUROSAWA YUKIO
    • H01H33/66H01J47/00H01T2/00H05G1/56H05G2/00
    • PURPOSE:To improve time delay in trigger discharge in vacuum by providing irradiation port at one part of a vacuum vessel as well as drawing out of the vacuum vessel while sealing an optical fiber therein, then irradiating at least one of paired electrodes with ultraviolet light from an ultraviolet light generator outside the vacuum vessel. CONSTITUTION:Voltage is applied between opposing electrodes 2, 3 from the outside, while the surface of the electrode 3 is irradiated with ultraviolet light by an ultraviolet irradiator 14 through a optical fiber 13, whereby secondary electrons occurs actively to impinge on the electrode 2, generating ions of such as metal vapor between the electrodes 2, 3. When a pulse source 11 is started in this state by means of an outside signal, creaping discharge occurs between a third electrode 6 and the electrode 2 through an insulator 5, whereby the opposing electrodes perform discharge according to the ions generated between the electrodes. In this case, since irradiation of ultraviolet light is carried out first to generated a lot of ions, effect on the electrode is moderated, thereby sharp improvement in the time delay in discharge is attained.
    • 4. 发明专利
    • PLASMA X-RAY SOURCE
    • JPS63284744A
    • 1988-11-22
    • JP11705687
    • 1987-05-15
    • HITACHI LTD
    • SUZUKI KOJIARITA HIROSHITOKUYAMA SHUNJIKUROSAWA YUKIO
    • H05G2/00H01J35/22H01L21/027H01L21/30H05G1/02
    • PURPOSE:To make it possible to obtain a plasma X-ray source with high brightness, long service life and large freedom in wave length selection by making the inside of a discharge vessel vacuum while providing a switching means outside a discharge circuit and also forming either of electrodes with X-ray generating material. CONSTITUTION:A switching means is sealed inside an electrode 1 positioned at the center of a vessel through an insulating material 11 and formed with a trigger electrode 12 drawn to the outside and a trigger pulse source 13 provided between the trigger electrode 12 and an electrode 1. Then, the inside of a discharge vessel 4 is exhausted in vacuum through an exhaust hole 14 and maintained at high vacuum degree. An X-ray material having a desired wave length is used for faced electrodes 1 and 2. Since discharge is generated on the faced electrodes with a switching means provided outside the discharge circuit, a switching means inside the discharge circuit is eliminated so that a large current with high speed pulse is obtained. Therefore, it is possible to generate X-ray with high brightness, eliminate the deterioration of the insulating material and prolong the service life in the plasma X-ray source.
    • 7. 发明专利
    • Gas-blowing breaker
    • 燃气断路器
    • JP2003348721A
    • 2003-12-05
    • JP2002155953
    • 2002-05-29
    • Hitachi Ltd株式会社日立製作所
    • TOKUYAMA SHUNJIURAI HAJIMEOSHITA YOICHIYANO MAKOTO
    • H01H33/873H02B13/02H02B13/055
    • H01H2033/566
    • 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
    • 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

    • 8. 发明专利
    • PUFFER TYPE GAS-BLAST CIRCUIT BREAKER
    • JP2002075148A
    • 2002-03-15
    • JP2000263534
    • 2000-08-31
    • HITACHI LTD
    • MINAMI NAOKITOKUYAMA SHUNJIURAI HAJIMEOSHITA YOICHIYANO MAKOTO
    • H01H33/915H01H33/70
    • 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.
    • 10. 发明专利
    • CAPACITOR BANK FOR PLASMA X-RAY SOURCE
    • JPS6457612A
    • 1989-03-03
    • JP21278087
    • 1987-08-28
    • HITACHI LTD
    • SUZUKI KOJIARITA HIROSHITOKUYAMA SHUNJIKUROSAWA YUKIO
    • H01G4/12H01G4/38H01J35/22H01L21/027H01L21/30H05G1/10H05G2/00
    • PURPOSE:To obtain an improvement of a capacitor bank in which a large number of ceramic capacitors are integrated and a method for integrating capacitors of easy maintenance, by a method wherein using a unit consisting of a plurality of ceramic capacitors connected in parallel, contact and departing are enabled between the moving contacts provided on the unit side and the fixed contacts provided on the container side. CONSTITUTION:As the capacitor bank in a plasma X-ray source wherein a capacitor bank, a trigger switch, a discharge tube, etc., are electrically connected to form an X-ray generating source, a unit capacitor 1 having a plurality of ceramic capacitors 2 connected in parallel is used. And, part of the conductor of the unit capacitor 1 is used as moving contacts 8, 9, and fixed contacts 6, 7 are provided on the unit capacitor container side, thereby facilitating insertion and removal of the unit capacitor 1. For instance, a plurality of ceramic capacitors 2 are connected between terminal boards 3, 4 thereby to construct a capacitor unit 1. And, the surrounding of the unit 1 is partitioned by an insulating partitioning board 5, and the moving contacts 8, 9 provided on one end of the terminal boards 3, 4 are brought into contact with the fixed contacts 6, 7 provided on part of the partitioning board 5.