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    Testing arrangement for measuring dielectric strength of liquid insulating media
    3.
    发明授权
    Testing arrangement for measuring dielectric strength of liquid insulating media 有权
    用于测量液体绝缘介质的介电强度的测试装置

    公开(公告)号：US07842171B2

    公开(公告)日：2010-11-30

    申请号：US11693353

    申请日：2007-03-29

    申请人： Michael Muhr ,  Werner Lick ,  Georg Johannes Pukel

    发明人： Michael Muhr ,  Werner Lick ,  Georg Johannes Pukel

    IPC分类号： G01N27/403 ,  G01N27/02

    CPC分类号： G01R31/1281 ,  G01R31/027

    摘要： A testing arrangement for testing the dielectric strength of liquid insulating media has a test cell comprising an interior space for receiving the insulating medium to be tested and a first test electrode and a second test electrode for generating an electric field in a test volume of the test cell. The test cell is arranged in the interior of a receiving vessel which is filled with an auxiliary insulating medium or in the interior of an evacuated receiving vessel.

    摘要翻译： 用于测试液体绝缘介质的介电强度的测试装置具有包括用于接收待测试的绝缘介质的内部空间的测试单元和用于在测试的测试体积中产生电场的第一测试电极和第二测试电极 细胞。 测试电池被布置在容纳容器的内部，其中填充有辅助绝缘介质或者在抽空的接收容器的内部。

    Partial-discharge measuring device
    4.
    发明授权
    Partial-discharge measuring device 失效
    局部放电测量装置

    公开(公告)号：US5804972A

    公开(公告)日：1998-09-08

    申请号：US587531

    申请日：1996-01-17

    申请人： Nicholas de Kock ,  Ingo Herbst

    发明人： Nicholas de Kock ,  Ingo Herbst

    IPC分类号： G01R29/00 ,  G01R31/12 ,  H02B13/065 ,  G01N27/60

    CPC分类号： G01R31/1281 ,  H02B13/0356 ,  H02B13/065

    摘要： A partial-discharge measuring device (3) which detects partial discharges in a gas-insulated, metal-enclosed, high-voltage system. The device includes an annular-gap antenna (6) arranged on the inner surface of the metal enclosure (1), a coaxial measuring cable (7) guided to a measuring instrument, and a tapering adaptor conductor (8) which connects the annular-gap antenna (6) and the coaxial measuring cable (7). The annular gap (9) of the antenna is determined by a plate-shaped electrode (10) which is inserted in an electrically insulated fashion into an opening (5), provided for a flanged attachment (4) in the metal enclosure (1). The adaptor conductor (8) includes an inner conductor, which supports the electrode (10), and is guided onto the shielded conductor (14) of the measuring cable (7), and an outer conductor which is guided onto the shield (15) of the measuring cable (7). The flanged attachment (4) tapers in the shape of a funnel between the opening (5) and the flange (16), and forms with its inner surface a first portion of the outer conductor. The partial-discharge measuring device (3) is of a simple and compact design and can be produced economically. In the UHF region, which is important for an accurate measurement of partial discharges, its transfer function exhibits at frequencies between 300 MHz and 1.8 GHz a portion which is high and flat. The measuring accuracy and sensitivity of the partial-discharge measuring device (3) are therefore particularly high in this frequency region.

    摘要翻译： 一种局部放电测量装置（3），其在气体绝缘金属封闭的高压系统中检测部分放电。 该装置包括布置在金属外壳（1）的内表面上的环形间隙天线（6），引导到测量仪器的同轴测量电缆（7）和锥形接合导体（8） 间隙天线（6）和同轴测量电缆（7）。 天线的环形间隙（9）由以电绝缘方式插入到金属外壳（1）中用于凸缘附件（4）的开口（5）中的板状电极（10）确定， 。 适配器导体（8）包括支撑电极（10）并被引导到测量电缆（7）的屏蔽导体（14）的内部导体和被引导到屏蔽（15）上的外部导体， 的测量电缆（7）。 凸缘附件（4）在开口（5）和凸缘（16）之间以漏斗的形状逐渐变细，并且其内表面形成外部导体的第一部分。 局部放电测量装置（3）具有简单紧凑的设计，可经济地生产。 在对于部分放电的精确测量非常重要的UHF区域中，其传输函数在300MHz和1.8GHz之间的频率处表现出高且平坦的部分。 因此，在该频率区域中，局部放电测量装置（3）的测量精度和灵敏度特别高。

    METHOD FOR DIAGNOSING INTERNAL FAULT OF OIL-IMMERSED TRANSFORMER THROUGH COMPOSITION RATIO OF DISSOLVED GAS IN OIL
    5.
    发明申请
    METHOD FOR DIAGNOSING INTERNAL FAULT OF OIL-IMMERSED TRANSFORMER THROUGH COMPOSITION RATIO OF DISSOLVED GAS IN OIL 有权
    用于通过油中溶解气体的组成比来诊断油相变压器的内部故障的方法

    公开(公告)号：US20150020572A1

    公开(公告)日：2015-01-22

    申请号：US14368677

    申请日：2012-12-26

    申请人： HYOSUNG CORPORATION

    发明人： Sung-Wook Kim ,  Hwang-Dong Seo ,  Sung-Jik Kim

    IPC分类号： G01R31/02 ,  G01K13/00 ,  G01N33/00

    CPC分类号： G01R31/027 ,  G01K13/00 ,  G01N1/2294 ,  G01N7/14 ,  G01N33/0004 ,  G01N33/203 ,  G01N33/24 ,  G01N33/2841 ,  G01R31/1281 ,  G01V9/007 ,  H01F27/12

    摘要： The present invention relates to a method for diagnosing an internal fault of an oil-immersed transformer by analyzing the composition ratio of dissolved gas in oil that is caused when an internal fault of the oil-immersed transformer occurs. According to the present invention, a method for diagnosing an internal fault of an oil-immersed tranformer by extracting and analyzing dissolved gas in oil from the oil-immersed transformer for which an internal fault is to be diagnosed comprises: a first step of calculating the composition ratio of each of CH4/H2, C2H2/C2H4, C2H4, C2H4/C2H6, and C2H4/CH4 from among the extracted dissolved gas in oil; a second step of determining whether the internal fault is an electrical fault or a thermal fault using the calculated composition ratios of CH4/H2 and C2H2/C2H4; and a third step of determining, if said internal fault is determined to be an electrical fault in the second step, whether the electrical fault is a partial discharge (PD), a discharge of low energy (D1), or a discharge of high energy (D2) using the calculated composition ratios of C2H2/C2H4 and C2H4/C2H6.

    摘要翻译： 本发明涉及通过分析油浸式变压器的内部故障发生时引起的油中溶解气体的组成比来诊断油浸式变压器的内部故障的方法。 根据本发明，一种用于通过从要从其诊断内部故障的油浸变压器中提取并分析油中的溶解气体来诊断油浸变压器的内部故障的方法包括：计算第一步骤 提取的溶解在油中的CH4 / H2，C2H2 / C2H4，C2H4，C2H4 / C2H6和C2H4 / CH4各自的组成比; 使用计算出的CH 4 / H 2和C 2 H 2 / C 2 H 4的组成比来确定内部故障是电故障还是热故障的第二步骤; 以及第三步骤，如果在所述第二步骤中所述内部故障被确定为电气故障，则确定电气故障是部分放电（PD），低能量（D1）的放电或高能量的放电 （D2），使用计算出的C2H 2 / C 2 H 4和C 2 H 4 / C 2 H 6的组成比。

    Apparatus for testing dielectric strength of materials
    7.
    发明授权
    Apparatus for testing dielectric strength of materials 失效
    用于测试材料的介电强度的装置

    公开(公告)号：US4663585A

    公开(公告)日：1987-05-05

    申请号：US575506

    申请日：1984-01-31

    申请人： Michael Kruger ,  Josef Baur

    发明人： Michael Kruger ,  Josef Baur

    IPC分类号： G01R31/12

    CPC分类号： G01R31/1281 ,  G01R31/027

    摘要： Apparatus for testing the dielectric strength of insulating and/or cooling media, particularly insulating oils for electrical apparatus and equipment such as transformers, converters, switches or the like wherein a vessel is provided within which the material to be tested may be contained with electrodes providing a spark gap arranged therein being connected to the high voltage side of a testing generator having a transformer and a voltage control device, the internal resistance of the testing generator being made voltage-dependent and increasing with increasing voltage.

    摘要翻译： 用于测试绝缘和/或冷却介质的绝缘强度的装置，特别是用于诸如变压器，转换器，开关等的电气设备和设备的绝缘油，其中提供容器，在该容器内可以包含电极， 其中设置的火花隙连接到具有变压器和电压控制装置的测试发生器的高压侧，测试发生器的内部电阻取决于电压并随着电压的增加而增加。

    Methods and apparatus for monitoring the condition of dielectric liquid in electric discharge machining
    8.
    发明授权
    Methods and apparatus for monitoring the condition of dielectric liquid in electric discharge machining 失效
    放电加工中电介质液体状态监测方法及装置

    公开(公告)号：US4392110A

    公开(公告)日：1983-07-05

    申请号：US158813

    申请日：1980-06-12

    申请人： Mohamed F. El-Menshawy ,  Peter A. Woodrow ,  Sushantha K. Bhattacharyya

    发明人： Mohamed F. El-Menshawy ,  Peter A. Woodrow ,  Sushantha K. Bhattacharyya

    IPC分类号： G01N27/22 ,  G01R27/26 ,  G01R31/12 ,  G01N27/60

    CPC分类号： G01R27/2605 ,  G01N27/221 ,  G01R31/1281

    摘要： Methods and apparatus for monitoring the condition of dielectric fluid used in EDM are described. A continuous sample of dielectric liquid is withdrawn from a tank containing the EDM electrode and workpiece and is passed between electrodes of a capacitance cell before being returned to the tank. The capacitance between the electrodes gives an indication of the amount of metal particles resulting from EDM in the dielectric liquid. In another arrangement a magnetic field is used to direct most ferrous particles through a capacitance cell or part of a capacitance cell while most non-ferrous particles pass through another cell or another part of the cell. Measurement of the capacities of the cells or parts of cells provides an indication of the relative amounts of ferrous and non-ferrous particles in the dielectric liquid. The relative concentrations of particles of different sizes can be measured by passing the sample dielectric through a number of cells with each cell having a different pore-size filter at its inlet. The capacitance of each cell then indicates the amount of particles within a predetermined range in the dielectric liquid.

    摘要翻译： 描述了用于监测EDM中使用的介质流体状况的方法和装置。 将电介质液体的连续样品从包含EDM电极和工件的罐中取出，并在返回到罐之前通过电容电池的电极之间。 电极之间的电容给出了介电液体中由EDM引起的金属颗粒的量的指示。 在另一种布置中，使用磁场来引导大多数含铁颗粒通过电容电池或电容单元的一部分，而大多数有色金属颗粒通过另一个电池或电池的另一部分。 细胞或细胞部分的容量的测量提供介电液体中铁和有色金属颗粒的相对量的指示。 不同尺寸的颗粒的相对浓度可以通过使样品电介质通过多个细胞来测量，每个细胞在其入口处具有不同的孔径过滤器。 每个电池的电容然后表示介电液体中预定范围内的颗粒量。

    DEVICE AND METHOD FOR ASSESSING THE DEGRADATION OF THE INSULATION OF AN OIL-INSULATED TRANSFORMER
    9.
    发明申请
    DEVICE AND METHOD FOR ASSESSING THE DEGRADATION OF THE INSULATION OF AN OIL-INSULATED TRANSFORMER 审中-公开
    用于评估绝缘变压器绝缘的降解的装置和方法

    公开(公告)号：US20140347071A1

    公开(公告)日：2014-11-27

    申请号：US14355992

    申请日：2012-11-14

    申请人： TECHIMP TECHNOLOGIES S.R.L.

    发明人： Gian Carlo Montanari ,  Matteo Fattori ,  Stefano Serra

    IPC分类号： G01R31/12 ,  G01N17/00

    CPC分类号： G01R31/1281 ,  G01N17/00 ,  G01N17/02 ,  G01N33/28 ,  H01F27/402 ,  H01F2027/404

    摘要： A device (1) for assessing the corrosion of the transformer windings in an oil-insulated transformer comprising a copper conductor (2) immersed in the oil. The change of the resistance of the copper conductor (2) over time is measured, e.g. using a Wheatstone bridge (2, 12a, 12b, 12c), and used to assess the degradation of the copper exposed to the insulation oil. The temperature of the copper conductor can be controlled by an heating element and a temperature sensor.

    摘要翻译： 一种用于评估在油绝缘变压器中的变压器绕组的腐蚀的装置（1），其包括浸入油中的铜导体（2）。 测量铜导体（2）随时间的电阻的变化，例如， 使用惠斯通电桥（2,12a，12b，12c），并用于评估暴露于绝缘油的铜的降解。 铜导体的温度可以通过加热元件和温度传感器来控制。

    Method for Identifying One or More Simultaneously Occurring Partial Discharge Sources
    10.
    发明申请
    Method for Identifying One or More Simultaneously Occurring Partial Discharge Sources 审中-公开

    公开(公告)号：US20140340096A1

    公开(公告)日：2014-11-20

    申请号：US14345397

    申请日：2012-09-17

    申请人： Olaf Rudolph

    发明人： Olaf Rudolph

    IPC分类号： G01R31/12 ,  G01R31/08

    CPC分类号： G01R31/1272 ,  G01R31/08 ,  G01R31/1254 ,  G01R31/1281

    摘要： A method for identifying one or more simultaneously occurring partial discharge sources from partial discharge measurement signals of an electrical device to which an AC voltage is applied. A method according to the invention for identifying one or more simultaneously occurring partial discharge sources from partial discharge measurement signals of an electrical device to which an AC voltage is applied, in particular a gas-insulated system, a high-voltage generator, a transformer, an electrical high-voltage power line or an electrical cable, comprises the following steps: on the basis of a frequency matrix into which measured partial discharge pulses are entered as partial discharge pulse matrix arrays according to the detected pulse amplitude and to the detected phase position and in which partial discharge pulse matrix arrays are allocated to at least one enclosed area of partial discharge pulse matrix arrays, determining area parameters of the at least one enclosed area of partial discharge pulse matrix arrays; comparing, for each enclosed area of partial discharge pulse matrix arrays, area parameters of the enclosed area of partial discharge pulse matrix arrays to predetermined rule sets, with each rule set corresponding to a characteristic partial discharge pulse area basic form; and allocating, for each enclosed area of partial discharge pulse matrix arrays, that rule set to the enclosed area which best corresponds to the enclosed area, such that one partial discharge pulse area basic form is allocated to each enclosed area of partial discharge pulse matrix arrays; applying predetermined fault rules, which allocate characteristic partial discharge pulse area basic forms and characteristic combinations of partial discharge pulse area basic forms to known partial discharge sources, to the ascertained partial discharge pulse area basic forms in order to determine those partial discharge sources which have rendered the corresponding partial discharge pulses.