Underground cable distribution box
Product Model Description
The model is composed of a name and a type code, and its specific meanings are as follows
Product Standards
- JB /T10840-2008 3.6kV-40.5kV High-voltage AC Metal-enclosed Cable tap Changer Switchgear.
- GB /T12706.4-2020 Extruded Insulated power cables and accessories with rated voltage from 1kV(Um=1.2kV) to 35kV(Um=40.5KV) – Part 4: Test requirements for accessories of power cables with rated voltage from 6kV(Um=7.2kV) to 3skV(Um=40.5kV).
Product Features
- According to the national standard requirements, when single-core cables are in normal operation, it is stipulated that the induced voltage at the other end of the metal sheath of the cable should not exceed 60V (or 100V when there are safety measures). To effectively avoid circulating current problems, At the cable joint or at the maximum allowable length of single-point grounding of the cable (the maximum allowable length of single-point grounding for 10kV power cables can be designed as 3.0km), using this product can perfectly solve the above problems.
- It is small in size, does not take up much space, is light in weight, easy to move, does not require a base for fixation, and has no special requirements for the installation environment. It is particularly suitable for use in dedicated cable channels for rail transit.
- The integrated design modular cable sheath protector adopts a large cross-section 400A square wave capacity, fully insulated and fully sealed structure, and seals the protector and high-voltage lead cable as a whole in high-quality insulating rubber material. The high-voltage lead cable is connected to the metal sheath of the power cable, and the grounding terminal is fixed on the grounding copper bar, which is used for overvoltage protection of the cable sheath.
- It adopts high-quality stainless steel materials, which can effectively avoid the problem of rusting due to moisture and also prevent the generation of eddy currents during operation.
- The internal structure is reasonably designed, facilitating installation and maintenance.
Main technical parameters table
Parameters of cable sheath protector
地埋式电缆分接箱
型号由名称及类型代号构成，具体含义如下
- 产品标准
- JB /T10840-2008 3.6kV-40.5kV高压交流金属封闭电缆分接开关设备。
- GB /T12706.4-2020 额定电压1kV(Um=1.2kV)到35kV(Um=40.5KV)挤包绝缘电力电缆及附件第4部分：额定电压6kV(Um=7.2kV)到 3skV(Um=40.5kV)电力电缆附件试验要求。
- 产品特点
- 按国标要求单芯电缆在正常运行时，规定电缆的金属护套另一端感应电压应不超过60V (或有安全措施时不超过100 V), 为有效避免环流问题，在电缆接头部位或电缆单点接地允许的最大长度处(10kV电力电缆单点接地允许的最大长度可按0km 设计),使用此产品可完美解决单上述问题。
- 体积小，不占空间，重量轻，方便搬运，无需底座固定，对安装环境无特别要求，特别适用于轨道交通专 用电缆通道内。
- 一体化设计组合式电缆护层保护器，保护器采用大截面400A方波容量，全绝缘、全密封结构，将保护器 和高压引线电缆整体密封在优质绝缘橡胶材料中。高压引线电缆与电力电缆金属护套连接，接地端子固定 在接地铜排上，用于保护电缆护层的过电压保护。
- 采用优质不锈钢材料，可有效避免潮湿生锈问题，同时也避免运行时产生涡流问题。
- 内部结构设计合理，方便安装及检修。
