Model SWGB-22-7 - Surge Wave Generator
From Cable Fault Location
According to statistics, the most common faults in the three-phase underground power cable occur such as 'single-phase breakdown' (breakdown of one of the cores to the cable sheath). Breakdown of this type can be 'creeping'(intermittent) (ie recovering insulation up to a certain voltage, which is lower than the operating voltage of the cable), and with the 'insulation leakage' (insulation resistance decreases up to tenskilohms - hundreds ohms).
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