Nuclear Grade Cable Accessories / Grounding Device
Protective earthing box
Model:
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Description
本产品适用于高压单芯电力电缆金属护套的接地保护,包含系统额定电压U0/U：8.7/15kV、19/33kV、26/35kV、48/66kV、64/110kV、76/138kV、127/220kV。采用不锈钢作为保护外壳，内部可浇注树脂。护层保护器采用ZnO压敏电阻作为保护元件，外绝缘采用进口绝缘材料制成。使得本产品拥有优良的伏安特性曲线，保护性能极好。
Features
- This product is suitable for the grounding protection of the metal sheath of high-voltage single-core power cables. It covers system rated voltages U0/U: 8.7/15kV, 19/33kV, 26/35kV, 48/66kV, 64/110kV, 76/138kV, and 127/220kV. It uses stainless steel as the protective housing, and the interior can be filled with resin. The sheath protection device uses a ZnO varistor as the protective element, and the external insulation is made of imported insulating material. This gives the product excellent volt-ampere characteristic curves and extremely good protective performance.
Specifications
1Current withstand capability (2 ms rectangular impulse current) / 600 A, 18 times / 600 A, 18 times
2DC 1 mA reference voltage test / ≥4 kV / ≥5.8 kV
3Rated voltage / 2.8 kV / 4 kV
4Continuous operating voltage (kV) / 2.24 / 3.2
5Residual voltage ratio / K≤2 / K≤2
6Residual voltage at nominal discharge current (10 kA) / ≤7 kV / ≤10 kV
Similar Products
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Features
- This product is suitable for the grounding protection of the metal sheath of high-voltage single-core power cables. It covers system rated voltages U0/U: 8.7/15kV, 19/33kV, 26/35kV, 48/66kV, 64/110kV, 76/138kV, and 127/220kV. It uses stainless steel as the protective housing, and the interior can be filled with resin. The sheath protection device uses a ZnO varistor as the protective element, and the external insulation is made of imported insulating material. This gives the product excellent volt-ampere characteristic curves and extremely good protective performance.
Specifications
1Current withstand capability (2 ms rectangular impulse current) / 600 A, 18 times / 600 A, 18 times
2DC 1 mA reference voltage test / ≥4 kV / ≥5.8 kV