| 电缆接地箱的功能特点 |
| 添加时间：2018/4/25 14:55:53 浏览次数： |
| 电缆接地箱是为限制电力电缆金属护层上的感应电压和故障过电压，避免在护层中形成环流而研发生产的。可广泛应用于单芯电力电缆线路中，用来保护电缆的金属护层免受各种过电压的危害。电缆接地箱安装在电缆金属护层与地之间，如果线路较长，还应将电缆护层分三段（或三的倍数段）相互绝缘，分段处用电缆交叉互联接地箱接地。系列电缆接地箱包括电缆护层直接接地箱、电缆护层保护接地箱和电缆护层交叉互联保护接地箱等几种形式。接地箱均采用密封设计，安装使用简便，外型小巧美观。目前，系列电缆接地箱已广泛应用于全国电力、铁路系统，并取得了良好的运行经验。 Cable grounding box is developed and manufactured to limit the induced voltage and fault Overvoltage on the metal sheath of power cables and avoid circulating current in the sheath. It can be widely used in single-core power cable lines to protect the metal sheath of the cable from various overvoltage hazards. The cable grounding box is installed between the metal protective layer of the cable and the ground. If the line is long, the cable protective layer should be separated into three sections (or multiples of three sections) to insulate each other, and the section should be grounded by the cable cross-connected grounding box. Series cable grounding boxes include direct grounding boxes with cable sheath, cable sheath protection grounding boxes and cable sheath cross-linked protection grounding boxes. The grounding boxes are sealed design, easy to install and use, compact and beautiful appearance. At present, series cable grounding boxes have been widely used in the national power and railway systems, and have gained good operational experience. 二、功能特点 2. Functional characteristics 电缆护层直接接地箱，内部含有连接铜排、铜端子等，用于电缆护层的直接接地。 The cable sheath direct grounding box contains copper bars, copper terminals and so on, which is used for direct grounding of cable sheath. 电缆护层保护接地箱和电缆护层交叉互联接地箱内含电缆护层保护器、连接铜排、铜端子等，用于电缆护层的保护接地。 The cable sheath protection grounding box and the cable sheath cross-connected grounding box contain cable sheath protector, connecting copper bar, copper terminal, etc., which are used for the protection grounding of cable sheath. 保护器采用ZnO压敏电阻作为保护元件，无串联间隙，保护特性好，具有优良的非线性伏安特性曲线。既具有瓷套式金属氧化物避雷器的优点，还具有电气绝缘性能好、介电强度高、抗漏痕、抗电蚀、耐热、耐寒、耐老化、防爆等优点及良好的化学稳定性、憎水性、密封性。 The protector uses ZnO varistor as protective element. It has no series gap, good protective characteristic and excellent non-linear volt-ampere characteristic curve. It not only has the advantages of ceramic sleeve MOA, but also has the advantages of good electrical insulation, high dielectric strength, leak resistance, corrosion resistance, heat resistance, cold resistance, aging resistance, explosion resistance and good chemical stability, hydrophobicity and sealing. |
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