The NS-JD series cable ground box produced by Baoding Xinsida Electric Technology Co., Ltd. is suitable for the metallic sheath protection grounding of power cables with voltage ratings of 127/220kV and below.

The NS-JD series cable grounding box is made of stainless steel, offering high mechanical strength and excellent sealing performance. Its internal wiring board is made of copper bars, ensuring superior conductivity. It is a reliable grounding device. Additionally, it can be paired with the NS-JHJD cross-connected grounding box and the NS-ZJJD direct grounding box to form a complete grounding protection system for the entire cable line, ensuring reliable cable operation.

NS-ZJJD Direct Grounding Box, NS-BHJD Protective Grounding Box, NS-JHJD Cross-Interconnected Grounding Box: Structure and Function

(1) The NS-ZJJD Direct Grounding Box is mainly composed of the housing, insulating support plates, core wire clip seats, and connecting copper busbars, etc. It is suitable for direct grounding of high-voltage single-core cross-linked cable joints and terminations.

(2) The NS-BHJD protective grounding box is primarily composed of components such as the housing, insulating support plates, core wire clamps, connecting copper busbars, and sheath protection devices. It is suitable for the protective grounding of high-voltage single-core cross-linked cable joints and terminations. It is used to control the induced voltage of the metallic sheath, reduce or eliminate the circulating current on the sheath, increase the cable's transmission capacity, prevent the outer sheath from being pierced, and ensure the cable's operation.

(3) The NS-JHJD Cross-Connected Grounding Box is primarily composed of the housing, insulating support plates, core wire clamp seats, connecting copper bars, cable sheath protectors, and other components. It is suitable for cross-connection and grounding protection at the joints and terminals of high-voltage single-core cross-linked cables. It is used to limit the increase of surge overvoltage on both sides of the sheath and insulating joints, control the induced voltage of the metallic sheath, reduce or eliminate the circular current on the sheath, increase the cable's transmission capacity, prevent the outer sheath from being pierced, and ensure the cable's operation.

The NS-JD series cable grounding box features excellent flame retardancy and corrosion resistance; its internal terminal board is made of copper strips, ensuring excellent conductivity; the sheath protector uses ZnO varistor as the protective element, with external insulation made of insulating materials, offering superior electrical performance and good sealing properties, as well as excellent voltage-current characteristics.