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    • 42. 发明专利
    • GAS INSULATED VOLTAGE TRANSFORMER
    • JPS61201410A
    • 1986-09-06
    • JP4235785
    • 1985-03-04
    • TOSHIBA CORP
    • MIZUTANI MASAAKI
    • H01F38/24H01F27/36H01F38/26
    • PURPOSE:To eliminate a fine gas gap and reduce an electrical stress at a flat part of a high voltage shielding by a method wherein a metal tape is applied around an insulation applied to a high voltage coil and the high voltage coil insulation is separated from the high voltage shielding by a predetermined distance. CONSTITUTION:Metal tapes 10, which have breaks so as not to make one complete turn to the direction of interlinkage with a core, are inserted between a high voltage shielding 4 and both ends of the outer circumference of an insulation of a high voltage coil 3 in order to avoid a fine gap between the high voltage coil 3 and the high voltage shielding 4. A crossing point P between the insulation of the high voltage coil 3 and a vertical line O-A drawn from a center O of bending radius (r) of both ends of the high voltage shielding 4 is positioned in such a manner that, if a winding thickness (build) of the high voltage coil 3 is H, a distance H1 from the high voltage shielding 4 to the point P is kept to be not less than 0.2H. With this constitution, the electrical stress at the upper part of the high voltage coil 3. where the electrical stress is the highest, or at the flat part of the high voltage coil 3 is relieved so that the size and the weight of a gas insulated VT can be reduced.
    • 43. 发明专利
    • Potential transformer
    • 潜在变压器
    • JPS61131409A
    • 1986-06-19
    • JP25157484
    • 1984-11-30
    • Toshiba Corp
    • NAKAJIMA TAKASHI
    • H01F38/24H01F38/26
    • H01F38/26
    • PURPOSE:To form the potential transformer generating no magnetic resonance in terminal voltage after CB is turned OFF without changing the external shape of PT at all by a method wherein a saturable reactor is arranged, as a magnetic resonance suppressing device, on the earth potential region surrounded by the inner wall of a PH tank and an earth shielding. CONSTITUTION:The saturable reactor 21, as a magnetic resonance suppressing device, is surrounded by a side face earth shield 15 and the inner wall of a tank 17, and it is arranged on the region surrounded by the earth electrode which is not opposing to the high tension electrode. By arranging a saturable reactor 21, as a magnetic resonance suppressing device, on the earth potential region surrounded by the tank inner wall, which is the dead space in the conventional structure, and the side face earth shield, the external measurements same as the conventional transformer can be obtained without giving effect on the external shape of PT. Also, as the saturable reactor 21 can be arranged on the earth potential region, the insulator of the saturable reactor itself can be simplified.
    • 目的:在通过其中设置可饱和电抗器的方法完成CB改变外部形状之后,在CB关断之后,在端子电压中不产生磁共振的电压互感器作为磁共振抑制装置,在地电位区域 被PH坦克的内壁和地面屏蔽包围。 构成:作为磁共振抑制装置的可饱和电抗器21被侧面接地屏蔽体15和箱体17的内壁包围,并且布置在由接地电极围绕的区域上,该区域不与 高压电极。 通过将作为磁共振抑制装置的可饱和电抗器21布置在由作为常规结构中的死区的罐内壁和侧面接地屏蔽围绕的地电位区域上,与常规的外部测量相同 可以获得不影响PT外形的变压器。 此外,由于饱和电抗器21可以布置在地电位区上,所以可以简化可饱和电抗器本身的绝缘体。