Research purposes: By researching and developing differential current transducer used for leakage detecting, to adapt the ground protection of traction inverter in localization type a metro vehicle.

研究目的：研制开发用于漏电检测的差动电流传感器，以适应国产化a型地铁车辆的牵引逆变器接地保护的要求。

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In this paper, the expressions of the input impedance for a probe type coaxial line-rectangular waveguide transducer are derived by means of self-reaction of an assumed current over the probe.

本文利用探针上假定电流的自反应，导出了探针式同轴线-矩形波导转换器输入阻抗的表达式。

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To avoid shortcomings of conventional current transducers in insulation and saturation, the hybrid optical sensor head of a new type air core current transducer is presented.

针对传统电流互感器易饱和﹑绝缘复杂等缺点，介绍了一种混合式光电电流互感器传感头用于测量的新型空心电流互感器。

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