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公开(公告)号：EP0729033A3
公开(公告)日：1997-07-16
申请号：EP96102466.8
申请日：1996-02-19
发明人： Sone, Isamu , Shirakura, Toshiharu , Kawashima, Keizaburo , Hayashida, Hiroshi , Nakagama, Yoshiaki , Shimizu, Makoto
IPC分类号： G01R15/20
CPC分类号： G01R15/246
摘要： An optical current transformer in which an influence of a temperature change in a magneto-optic sensor unit is compensated to conduct measurements with high accuracy by the following structure: Between two polarizers 4 and 5 having mutually different transmission polarized light directions, a Faraday rotator 6 is disposed to form a magneto-optic sensor unit. Light beams from optical transmission units 2 and 2' are inputted to the magneto-optic sensor unit in opposite directions. Two light sources 7 and 7' for emitting the input light beams emit light beams having the same waveform characteristics. Light beams outputted from the magneto-optic sensor unit are converted to electric signals by photoelectric conversion units 8 and 8'. Two light beams traveling through the magneto-optic sensor unit in mutually opposite directions are subjected to intensity modulation by using mutually different frequencies. From the electric signals after photoelectric conversion, intensity-modulated frequency components are selectively extracted. The change of quantity of light caused in two light beams by the Faraday effect is derived by differential computation.
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2.发明公开
公开(公告)号：EP0066298A2
公开(公告)日：1982-12-08
申请号：EP82104836.0
申请日：1982-06-02
申请人： Hitachi, Ltd.
发明人： Yamaguchi, Motoo , Sone, Isamu , Hirasawa, Kunio , Yoshioka, Yoshio , Nishikawa, Akio , Suzuki, Hiroshi , Sato, Mikio , Hosokawa, Masao
IPC分类号： H01H33/02
CPC分类号： H01H33/021
摘要： A SF 6 gas insulating electric apparatus usable as a circuit breaker, etc., containing a SF 6 gas insulator and a resin insulator, both of which insulators are present in an atmosphere to be exposed to arcs, characterized by making at least the surface portion to be exposed to arcs of the resin insulator from a polymer containing nitrogen atoms or a polyolefin resin. and if necessary together with an inorganic filler powder, is excellent in both surface and inner arc resistance and can maintain breaking performance for a long period of time.
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公开(公告)号：EP0729033A2
公开(公告)日：1996-08-28
申请号：EP96102466.8
申请日：1996-02-19
发明人： Sone, Isamu , Shirakura, Toshiharu , Kawashima, Keizaburo , Hayashida, Hiroshi , Nakagama, Yoshiaki , Shimizu, Makoto
IPC分类号： G01R15/20
CPC分类号： G01R15/246
摘要： An optical current transformer in which an influence of a temperature change in a magneto-optic sensor unit is compensated to conduct measurements with high accuracy by the following structure: Between two polarizers 4 and 5 having mutually different transmission polarized light directions, a Faraday rotator 6 is disposed to form a magneto-optic sensor unit. Light beams from optical transmission units 2 and 2' are inputted to the magneto-optic sensor unit in opposite directions. Two light sources 7 and 7' for emitting the input light beams emit light beams having the same waveform characteristics. Light beams outputted from the magneto-optic sensor unit are converted to electric signals by photoelectric conversion units 8 and 8'. Two light beams traveling through the magneto-optic sensor unit in mutually opposite directions are subjected to intensity modulation by using mutually different frequencies. From the electric signals after photoelectric conversion, intensity-modulated frequency components are selectively extracted. The change of quantity of light caused in two light beams by the Faraday effect is derived by differential computation.
摘要翻译： 通过以下结构，补偿了磁光传感器单元中温度变化的影响进行高精度测量的光电流互感器：在具有相互不同的透射偏振光方向的两个偏振器4和5之间，法拉第转子6 被布置成形成磁光传感器单元。 来自光传输单元2和2'的光束以相反方向输入到磁光传感器单元。 用于发射输入光束的两个光源7和7'发射具有相同波形特性的光束。 从磁光传感器单元输出的光束由光电转换单元8和8'转换成电信号。 以相互相反的方向传播通过磁光传感器单元的两个光束通过使用相互不同的频率进行强度调制。 从光电转换后的电信号，选择性地提取强度调制频率分量。 通过差分计算推导出由法拉第效应引起的两个光束中的光量变化。
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4.发明公开
公开(公告)号：EP0066298A3
公开(公告)日：1985-05-15
申请号：EP82104836
申请日：1982-06-02
申请人： Hitachi, Ltd.
发明人： Yamaguchi, Motoo , Sone, Isamu , Hirasawa, Kunio , Yoshioka, Yoshio , Nishikawa, Akio , Suzuki, Hiroshi , Sato, Mikio , Hosokawa, Masao
IPC分类号： H01H33/02
CPC分类号： H01H33/021
摘要： A SF 6 gas insulating electric apparatus usable as a circuit breaker, etc., containing a SF 6 gas insulator and a resin insulator, both of which insulators are present in an atmosphere to be exposed to arcs, characterized by making at least the surface portion to be exposed to arcs of the resin insulator from a polymer containing nitrogen atoms or a polyolefin resin. and if necessary together with an inorganic filler powder, is excellent in both surface and inner arc resistance and can maintain breaking performance for a long period of time.
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