Leakage Current Detector
The present invention relates to a leakage current detector for detecting a leakage current generated in a power line connecting an external power source and a load using a video current transformer. The leakage current detector includes a first amplifying part for processing and amplifying a curren...
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| Format: | Patent |
| Sprache: | eng ; kor |
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| Zusammenfassung: | The present invention relates to a leakage current detector for detecting a leakage current generated in a power line connecting an external power source and a load using a video current transformer. The leakage current detector includes a first amplifying part for processing and amplifying a current signal supplied from an external power source to a load, a second amplifying part for processing and amplifying a current signal detected by a video current transformer connecting the external power source and the load, and a control part for detecting whether a leakage current occurs in a line connecting the external power source and the load based on a phase difference between an output signal generated by the first amplifying part and an output signal generated by the second amplifying part.
본 발명은 영상변류기를 이용하여 외부전원과 부하를 연결하는 전원 선에 발생하는 누설전류여부를 파악하는 누전 차단기에 있어, 외부전원이 부하에 공급하는 전류 신호를 처리하여 증폭하는 제1 증폭부, 상기 외부전원과 부하 간을 연결하는 영상변류기가 검출한 전류신호를 처리하여 증폭하는 제2 증폭부, 및 상기 제 1 증폭부가 발생하는 출력신호와 상기 제2 증폭부가 발생하는 출력신호 간의 위상차이를 근거하여, 상기 외부전원과 부하 간을 연결하는 선로의 누전 발생 여부를 검출하는 제어부를 포함한 누전차단기에 관한 것이다. |
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