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公开(公告)号：US4325096A
公开(公告)日：1982-04-13
申请号：US108245
申请日：1979-12-27
CPC分类号： H01F38/28 , H01F2003/106
摘要： A zero-phase current transformer for use as a leakage current detecting element in a leakage current interrupter in which two magnetic materials of different permeabilities are provided so as to eliminate a range where the leakage current interrupter is inoperable without lowering its ability to distinguish noise components. The different magnetic materials may be provided as a single core constructed by mixing the materials of different permeabilities. Otherwise, the materials can be provided as annually-shaped magnetic pieces stacked one on top of the other. Still further, the materials of different magnetic permeability may be provided as bands of materials interwound to form alternating layers or one of the materials may be provided as at least a portion of a protective case.
摘要翻译： 一种用作漏电流断流器中的漏电流检测元件的零相电流互感器，其中提供两个不同磁导率的磁性材料，以消除泄漏电流中断器不可操作的范围，而不降低其区分噪声分量的能力 。 可以将不同的磁性材料提供为通过混合不同渗透性的材料构成的单个芯。 否则，材料可以被提供为一个彼此堆叠的每年形状的磁性片。 此外，不同磁导率的材料可以被提供为相互缠绕的材料带以形成交替的层，或者可以将一种材料提供为保护壳的至少一部分。
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公开(公告)号：US4234900A
公开(公告)日：1980-11-18
申请号：US27018
申请日：1979-04-03
申请人： Yukio Miyazaki , Mitsugu Taketa
发明人： Yukio Miyazaki , Mitsugu Taketa
CPC分类号： H02H3/33
摘要： A sensed current resulting from the occurrence of a ground fault is amplified by a differential amplifier and applied to a waveform shaper after having been delayed. The waveform shaper includes two complementary transistors interconnected into a thyristor and a transistor for amplifying the delayed current from the thyristor to a constant current under the control of a negative feedback transistor. The constant current is applied to a thyristor to turn it on to activate an associated circuit interrupter.
摘要翻译： 由于发生接地故障而产生的感应电流被差分放大器放大，并被延迟后施加到波形整形器。 波形整形器包括互连到晶闸管的两个互补晶体管和用于在负反馈晶体管的控制下将从晶闸管延迟的电流放大到恒定电流的晶体管。 将恒定电流施加到晶闸管以将其导通以激活相关联的电路断续器。
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