Interior direct grounding box of high tension cable who establishes on -line monitoring device

The utility model discloses an interior direct grounding box of high tension cable who establishes on -line monitoring device, its box is inside including four cables, be respectively A, B, C, four -phase earthing cable, its characterized in that: A, B, C three -phase earthing cable's heart yearn 1 on, be equipped with sheath current monitoring CT11, partial discharge monitoring high frequency CT12 and partial discharge monitoring phase place CT13. On -line monitoring device's among the direct grounding box of this high tension cable sensitivity is high, not fragile, long service life. 本实用新型公开了种内设在线监测装置的高压电缆直接接地箱，其箱体内部包括四根电缆，分别为A、B、C、地四相接地电缆；其特征在于：所述的A、B、C三相接地电缆的芯线1上，设有护套电流监测CT11、局部放电监测高频CT12和局部放电监测相位CT13。该高压电缆直接接地箱中的在线监测装置的灵敏度高，不易损坏，使用寿命长。