| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform the self-inspection of an antenna circuit, regardless of the variety of an antenna. SOLUTION: A sensor 15 arranged at a position for detecting electromagnetic waves generated by the partial discharge of an electric equipment is connected to this insulation abnormality monitoring device 16 by a cable 21. A circuit (resistors R1 -R4 and a photocoupler 27) for detecting the short circuit and disconnection of the sensor and the cable is provided, and, when the short circuit or the disconnection is caused in the sensor or the cable, a detection circuit detects it and display is performed at a display part 31 or the like, as needed.</p> |
