| 摘要 |
A device (1) for detecting and precisely locating defects (25) within the insulation of an insulated conductor (20) includes an antenna (2), arranged to couple the high frequency signals (27) produced by the partial discharge pulses (26) generated by defects (25) within the insulating layer of the insulated conductor (20). The antenna (2) is connected to a connector (3) to be connected to a measurement device (4). The antenna (2) is a compact antenna having dimensions similar to or smaller than those of the cross section of the stator bar to be tested and is shaped to detect signals having a frequency less then 800 MHz. A method for detecting defects (25) within the insulation of an insulated conductor (20), such as for example stator bars (Roebel bars) of rotating electrical machines, such as a generator or a motor or other electrical machines, during, for example, testing or manufacturing quality control operations, utilizes the device.
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