电缆接地保护箱和直接接地箱的安装规定是什么 |
添加时间:2023/9/20 15:10:37 浏览次数: |
电缆接地保护箱和直接接地箱的安装规定是什么
What are the installation requirements for cable earthing protection boxes and direct grounding boxes?
1.屏蔽一端直接接地,另一端通过护层保护接地:当线路长度在500---700m及以下时,屏蔽层可采用一端直接接地(电缆终端头位置接地),另一端通过护层保护器接地。
1. One end of the shield is grounded directly, the other end is
grounded through protective layer: when the length of the line is
500-700m or less, the shield layer can be grounded directly at one end
(grounded at the end of the cable), and the other end is grounded
through protective layer.
2. shielding neutral point grounding: when the line length is
1000----1400m, the neutral point grounding mode must be adopted. (1) In
the middle position of the circuit, the shield is directly grounded, and
the shield at both ends of the cable is grounded through the shield
protector. The intermediate junction generally needs to install a
through joint. (2) Install an insulated joint at the midpoint of the
circuit. The insulated joint disconnects the cable shield, and the
shielded ends are grounded through the protective layer protector
respectively. The two cable terminals are shielded and grounded
directly |
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