| 摘要 |
The invention relates to a device (DTC) for detecting, in an electrical network conveying a low-voltage AC voltage (Vac), a defect of insulation between a phase wire (P) and a neutral wire (N) manifested by the appearance of partial-discharge signals (PDS). The device comprises means (ZCCT, MC) for associating with each partial-discharge signal detected, a parameter indicative of the position of the signal on the curve of the AC voltage (Vac), then searching for whether there exists, between several partial-discharge signals detected during different cycles of variation of AC voltage, at least one correlation indicative of an insulation defect. Application in particular to fire prevention. |
