| 摘要 |
PROBLEM TO BE SOLVED: To provide a leakage current detector device for house power receiving facility by using an Igr detection means of scalar system, which is capable of attaining a high precision and a low cost with a simple configuration. SOLUTION: In the Igr detector 10, signals from a CT 8 for the detector provided on a low voltage cable way 4 and the CT provided on a ground line of B class for superposing the signal are inputted. Between the two systems of signals, the data regarding the fundamental wave processed by a band pass filter 15 together with the information from a band pass filter 16 for an n-th harmonic wave, are output with the information for the case of leakage current by a resistance component operation circuit 17, and made to be able to display using an output circuit 18. COPYRIGHT: (C)2008,JPO&INPIT
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