| 摘要 |
PROBLEM TO BE SOLVED: To provide a partial discharge detector capable of dispensing with a dedicated microwave antenna, and capable of simplifying the detector structure. SOLUTION: An insulating spacer 4 is provided to support a conductor 5, in the insides of grounded containers 2, 3. A peripheral edge part of the insulating spacer 4 is clamped by flange parts 2a, 3a, to be connected to an assembling bolt 6. A metal cover 7 is provided in the outer circumferential face of the insulating spacer 4. Slot-like opening parts 10 are provided at two positions in the metal cover 7. Measuring cables 8 are connected to both sides of a long side in the slot-like opening part 10, and the measuring cables 8 are connected to a signal processor. Electromagnetic waves due to partial discharge are generated in the insides of the grounded containers 2, 3 or the like, when partial discharge is generated in the inside of gas insulation equipment 1. The electromagnetic waves propagate in a wave guide, constituted of the grounded containers 2, 3 and the metal cover 7. Since the electromagnetic waves are extracted by the measuring cables 8 to detect the partial discharge, the slot-like opening part 10 provided in the metal cover 7 acts as a rod antenna with respect to the electromagnetic waves. COPYRIGHT: (C)2008,JPO&INPIT
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