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10 条记录 (耗时 0.012 秒)

    Insulation degradation diagnostic device
    2.
    发明申请
    Insulation degradation diagnostic device 有权
    绝缘降解诊断装置

    公开(公告)号：US20070085548A1

    公开(公告)日：2007-04-19

    申请号：US10576451

    申请日：2004-10-21

    申请人： Takashi Shinmoto ,  Yuji Urabe ,  Tatsuya Murofushi ,  Tatsuya Ogawa

    发明人： Takashi Shinmoto ,  Yuji Urabe ,  Tatsuya Murofushi ,  Tatsuya Ogawa

    IPC分类号： G01R31/00

    CPC分类号： G01R31/1272

    摘要： An insulation degradation diagnostic device (1a) comprises a current transformer (7a), a first amplifier (15), a first high-pass filter (17), a low-pass filter (19), a second amplifier (20), a second high-pass filter (21), and a discharge judgment section (30). The current transformer (7a) has a filtering function with an amount of attenuation of −60 dB or less and a slope characteristic of −5 dB/oct or less at a commercial frequency and detects a current flowing through a grounding conductor (5). The first amplifier (15) amplifies a current signal from the current transformer (7a). The first high-pass filter (17) removes a low frequency component from an amplified current signal. The low-pass filter (19) removes a high frequency component from a current signal from which the low frequency component has been removed. The second amplifier (20) amplifies a current signal from the low-pass filter (19) to a predetermined level. The second high-pass filter (21) extracts a signal corresponding to a discharge current caused by a partial discharge from the current signal amplified in the second amplifier (20). The discharge judgment section (30) judges whether or not a partial discharge has occurred in a cable (2) based on the signal extracted in the second high-pass filter (21).

    摘要翻译： 绝缘降解诊断装置（1a）包括电流互感器（7a），第一放大器（15），第一高通滤波器（17），低通滤波器（19），第二放大器（20） ，第二高通滤波器（21）和放电判断部（30）。 电流互感器（7a）具有滤波功能，其商业频率的衰减量为-60dB或更小，斜率特性为-5dB / oct或更小，并且检测流过接地导体（5）的电流， 。 第一放大器（15）放大来自电流互感器（7a）的电流信号。 第一高通滤波器（17）从放大的电流信号中去除低频分量。 低通滤波器（19）从已经去除了低频分量的电流信号中去除高频分量。 第二放大器（20）将来自低通滤波器（19）的电流信号放大到预定电平。 第二高通滤波器（21）从在第二放大器（20）中放大的电流信号中提取与由局部放电引起的放电电流相对应的信号。 放电判定部30基于在第二高通滤波器21中提取的信号，判断电缆（2）中是否发生局部放电。

    Insulation degradation diagnostic device
    4.
    发明授权
    Insulation degradation diagnostic device 有权
    绝缘降解诊断装置

    公开(公告)号：US07285961B2

    公开(公告)日：2007-10-23

    申请号：US10576451

    申请日：2004-10-21

    申请人： Takashi Shinmoto ,  Yuji Urabe ,  Tatsuya Murofushi ,  Tatsuya Ogawa

    发明人： Takashi Shinmoto ,  Yuji Urabe ,  Tatsuya Murofushi ,  Tatsuya Ogawa

    IPC分类号： G01R31/02

    CPC分类号： G01R31/1272

    摘要： An insulation degradation diagnostic device (1a) comprises a current transformer (7a), a first amplifier (15), a first high-pass filter (17), a low-pass filter (19), a second amplifier (20), a second high-pass filter (21), and a discharge judgement section (30). The current transformer (7a) has a filtering function, with an amount of attenuation of −60 dB or less and a slope characteristic of −5 dB/oct or less at a commercial frequency and detects a current flowing through a grounding conductor (5). The first amplifier (15) amplifies a current signal from the current transformer (7a). The first high-pass filter (17) removes a low frequency component from an amplified current signal. The low-pass filter (19) removes a high frequency component from a current signal from which the low frequency component has been removed. The second amplifier (20) amplifies a current signal from the low-pass filter (19) to a predetermined level. The second high-pass filter (21) extracts a signal corresponding to a discharge current caused by a partial discharge from the current signal amplified in the second amplifier (20). The discharge judgement section (30) judges whether or not a partial discharge has occurred in a cable (2) based on the signal extracted in the second high-pass filter (21).

    摘要翻译： 绝缘降解诊断装置（1a）包括电流互感器（7a），第一放大器（15），第一高通滤波器（17），低通滤波器（19），第二放大器（20） ，第二高通滤波器（21）和放电确定部分（30）。 电流互感器（7a）具有滤波功能，其商业频率具有-60dB或更小的衰减量和-5dB / oct或更小的斜率特性，并且检测流过接地线（5）的电流 ）。 第一放大器（15）放大来自电流互感器（7a）的电流信号。 第一个高通滤波器（17）消除放大电流信号的低频分量。 低通滤波器（19）从消除了低频分量的电流信号中消除了高频分量。 第二放大器（20）将来自低通滤波器（19）的电流信号放大到预定电平。 第二高通滤波器（21）从由第二放大器（20）放大的当前信号中提取与由局部放电引起的放电电流相对应的信号。 放电判定部（30）基于由第二高通滤波器（21）提取的信号，确定是否在电缆（2）中发生了局部放电。

    Composite optical fiber and power cable
    7.
    发明授权
    Composite optical fiber and power cable 失效
    复合光纤和电力电缆

    公开(公告)号：US4787705A

    公开(公告)日：1988-11-29

    申请号：US11798

    申请日：1987-02-06

    申请人： Takashi Shinmoto ,  Masato Koike

    发明人： Takashi Shinmoto ,  Masato Koike

    IPC分类号： G02B6/44 ,  H01B9/00 ,  H01B11/22

    CPC分类号： G02B6/4416

    摘要： A composite power cable includes an elongated cable core having an electrical conductor and a shield layer of a semiconductive material. The cable includes an outer sheath of a first thermoplastic resin encompassing the cable core. A plurality of concentric neutral wires are embedded in the outer sheath and helically wound around the cable core. At least one elongated flexible optical fiber unit is embedded in the outer sheath and helically wound around the cable core so as to extend along the neutral wires. The fiber unit includes an elongated body of a second thermoplastic resin extending longitudinally thereof, at least one flexible tube embedded in the body to extend longitudinally thereof, at least one optical fiber loosely received in the tube to extend longitudinally thereof and at least one elongated tension member embedded in the body to extend longitudinally thereof. The second thermoplastic resin is different from the first thermoplastic resin and has non-adhesive property with respect to the first thermoplastic resin.

    摘要翻译： 复合电力电缆包括具有电导体和半导体材料的屏蔽层的细长电缆芯。 电缆包括包围电缆芯的第一热塑性树脂的外护套。 多个同心中性线被嵌入在外护套中并螺旋缠绕在电缆芯上。 至少一个细长的柔性光纤单元嵌入在外护套中并螺旋缠绕在电缆芯上，以沿着中性线延伸。 所述纤维单元包括长形延伸的第二热塑性树脂的细长主体，至少一个柔性管，嵌入在所述主体中以纵向方向延伸;至少一个光纤松散地容纳在所述管中，以纵向延伸，并且至少一个拉伸张力 嵌入体内的构件纵向延伸。 第二热塑性树脂与第一热塑性树脂不同，并且相对于第一热塑性树脂具有非粘合性。