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81. 发明专利

JP2002148301A PARTIAL DISCHARGE DETECTION DEVICE 失效
公开(公告)号：JP2002148301A
公开(公告)日：2002-05-22
申请号：JP2000343872
申请日：2000-11-10
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJII SHIGEO
IPC分类号： G01R31/12 , H01H33/26 , H02B13/065 , H02G5/08
摘要： PROBLEM TO BE SOLVED: To provide a partial discharger detection device capable of detecting the generation cause of partial discharge, and executing accurate and quick determination. SOLUTION: In this partial discharge detection device, a voltage signal is inputted through a floating electrode 4 installed in the insulating state in gas insulating electrical machinery and equipment composed by storing a high- voltage charging part together with insulating gas in a metal container 1, and the voltage signal is processed, and the partial discharge generated inside the gas insulating electrical machinery and equipment is detected. The device is equipped with a wide input amplifier 8A and a waveform conversion part 9 for preventing saturation of an envelop waveform of a wide-range partial discharge signal generated inside the gas insulating electrical machinery and equipment, and a partial discharge cause determination part 22 for detecting a peak value of the envelop waveform, and specifying the partial discharge generation cause.

82. 发明专利

JP2001155592A GAS ISOLATED SWITCHGEAR 失效
公开(公告)号：JP2001155592A
公开(公告)日：2001-06-08
申请号：JP33829399
申请日：1999-11-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： H02B13/065 , H01H33/26 , H01H33/59 , H02G5/06
摘要： PROBLEM TO BE SOLVED: To control action of a breaker by detecting the quantity of a decomposed gas. SOLUTION: After a circuit is cut by a breaker 17, circuit reclosing action of the breaker 17 is delayed by a predetermined period when the quantity of a decomposed gas detected by a gas detecting means near a breaking part 17a in the breaker 17 is more than predetermined, and circuit reclosing action of the breaker 17 is conducted according to the directions of permission signal of circuit reclosing to a switch control means 18 when the quantity of the decomposed gas lowers to the predetermined value or less.

83. 发明专利

JP2000133095A SURGE DISPLAY DEVICE 失效
公开(公告)号：JP2000133095A
公开(公告)日：2000-05-12
申请号：JP30751198
申请日：1998-10-28
申请人： OTOWA ELECTRIC
发明人： SHIMOJIMA YASUHIRO , AZUMA MASAHIRO
IPC分类号： H01H33/26
摘要： PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive surge display device capable of displaying presence of infiltration of a lightning surge with a simple structure. SOLUTION: This surge display device comprises a pin 12 supported by a display main body 1 to freely project from the display body 1, a permanent magnet 14 for holding the pin 12 in a non-projecting state by attracting a moving iron core 13 provided at the front end of the pin 12, an electromagnet 15 interposed between the pin 12 and the permanent magnet 14, penetrated by the moving iron core 13, excited by an inflow of a surge current detected by current transformers 6, and offsetting magnetic force of the permanent magnet 14 by the excitation, and a compression spring 16 interposed between the electromagnet coil 15 and the pin 12, for energizing the pin 12 in the projecting direction. The inflow of the surge current excites the electromagnet 15 so as to separate the pin 12 from the permanent magnet 14 for projecting the pin 12, while the projected pin 12 can be returned to the initial state by push of the pin 12.

84. 发明专利

JP2952737B2 失效
公开(公告)号：JP2952737B2
公开(公告)日：1999-09-27
申请号：JP6509293
申请日：1993-03-24
申请人： NITSUSHIN DENKI KK
发明人： KANEMAN NAOHIRO , SAITO MUNECHIKA
IPC分类号： G01R31/12 , H01H33/26 , H01Q13/10

85. 发明专利

JPH07294360A ELECTRIC APPARATUS WITH INTEGRATED PRESSURE DETECTOR 失效
公开(公告)号：JPH07294360A
公开(公告)日：1995-11-10
申请号：JP9336895
申请日：1995-04-19
申请人： GEC ALSTHOM T & D SA
发明人： JIYANNRIYUKU BESEDO
IPC分类号： G01L1/24 , G01L11/00 , G01L21/00 , H01H33/26 , H01H33/66 , H01H33/668 , G01L11/02
摘要： PURPOSE: To provide an equipment with a casing which includes a pressure detecting device integrally formed in the casing. CONSTITUTION: A detecting means for detecting leakage which produce pressure change in the equipment includes a first optical fiber mat 5 for receiving stress when pressure in a cylindrical casing changes, a light source 6 for feeding light in the fiber of a mat 5 and a detector 7 for detecting change in light phase between an entrance and exit in the mat 5 of the fiber.

86. 实用新型

JPH0719934U 失效
公开(公告)号：JPH0719934U
公开(公告)日：1995-04-07
申请号：JP5153593
申请日：1993-09-22
IPC分类号： H01H33/26

87. 发明专利

JPH05225867A VACUUM BREAKER 失效
公开(公告)号：JPH05225867A
公开(公告)日：1993-09-03
申请号：JP30695192
申请日：1992-11-17
申请人： ALSTHOM GEC
发明人： BAN DOAN FUAN
IPC分类号： H01H33/00 , H01H33/26 , H01H33/66 , H01H33/668
摘要： PURPOSE: To effectively and continuously monitor a circuit breaker including a vacuum chamber by providing a scintillation fiber connected to a photoelectric device in a space between an enclosure and an outer surface of the vacuum chamber. CONSTITUTION: This vacuum circuit breaker is that a vacuum chamber 11 is positioned inside an enclosure 10 made of insulation materials and that a space between the vacuum chamber 11 and the enclosure 10 is filled with air. A scintillation optical fiber 25 is positioned inside a space 21. One end 26 of the fiber 25 is free, another end 27 is connected to a photoelectric conversion device such as a photodiode 28 passing through a cover 20, and signals generated by the photodiode 28 are amplified and utilized. By continuously recording the signals, signal strength, and signal duration corresponding to X-rays, condition change inside a vacuum circuit breaker can be estimated as a function of a continuous operation. As this circuit breaker can detect both X-rays and visible rays generated by a cut-off arc, an operation of an apparatus can be checked enough.

88. 发明专利

JPH04136771A METHOD FOR DETECTING INTERNAL PARTIAL DISCHARGE OF GAS INSULATED SWITCHGEAR 失效
公开(公告)号：JPH04136771A
公开(公告)日：1992-05-11
申请号：JP25722990
申请日：1990-09-28
申请人： TOSHIBA CORP
发明人： HASEGAWA SHIN , KONISHI KATSUMI , MARUYAMA SHIRO , SAKAKIBARA TAKAAKI
IPC分类号： G01R29/00 , G01R31/12 , G01R31/327 , G01R31/333 , H01H9/50 , H01H33/26 , H02B13/065 , H02H5/00
摘要： PURPOSE:To efficiently locate a trouble place with high accuracy by using a reduced number of detectors usually to perform on-line monitor by properly using detection frequency. CONSTITUTION:When a disconnector 5 on a line side and a disconnector 2A on a bus side are opened in a circuit I, the usual line and main bus 1A of the circuit I are stopped and regions B, D to be monitored are charged through a main bus 1B. Since it is necessary to monitor the partial discharge in both regions B, D to be monitored, the partial discharge detectors 13B, 13D in the respective regions B, D are used to monitor the regions B, D and partial discharge can be detected. By this method, when partial discharge is usually monitored on-line, partial discharge can be efficiently monitored by using only the partial discharge detector of a necessary region.

89. 发明专利

JPH0363027B2 失效
公开(公告)号：JPH0363027B2
公开(公告)日：1991-09-27
申请号：JP14341782
申请日：1982-08-20
申请人： HITACHI LTD
发明人： YAMAGIWA TOKIO , ISHIKAWA TOSHIO , OZAWA ATSUSHI , ENDO KAORU , HOSOKAWA MASAO
IPC分类号： G01R3/00 , G01R31/12 , G01R31/327 , G01R31/333 , H01H31/00 , H01H33/26

90. 发明专利

JPH01280266A PARTIAL DISCHARGE DETECTING METHOD FOR GAS INSULATION EQUIPMENT 失效
公开(公告)号：JPH01280266A
公开(公告)日：1989-11-10
申请号：JP10912588
申请日：1988-05-06
申请人： TOSHIBA CORP
发明人： TAKAHASHI SHIGERU , KOYAMA MITSUTOSHI , SAKAKIBARA TAKAAKI , MARUYAMA SHIRO
IPC分类号： G01R31/12 , H01H33/26 , H02G15/20
摘要： PURPOSE:To improve the measurement sensitivity of the insulation equipment constituted by arranging a high voltage conductor in a metallic container by providing a sensor for partial discharge detection nearby the discontinuous part of the metallic container which varies in surge impedance. CONSTITUTION:For example, gaseous SF6 is compressed and filled in the metallic container 8. A bushing 9 is fixed to the upper part of the container 8 and the high voltage conductor in the container 8 is connected to an overhead wire 10 through the bushing. The sensor 11 for excessive potential measurement is connected to the flange part 9c of the bushing 9. If partial discharge is caused in the container 8, a current pulse is propagated on the internal surface of the container 8 and when it reaches the bushing 9, the surge impedance varies, so an excessive potential difference is generated between the external surface of the container 8 and the ground. When the surge impedance values of the insulation equipment, overhead wire 10, and container 8 are denoted as Z1, Z2, and Z3 respectively, the transmission coefficient of a partial discharging pulse to the container 8 is represented as -2Z3/CZ1+Z2+Z3. The potential generated at this flange 9 is detected by the sensor 11.

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