How do I deal with lightning protection requirements of optical fiber cables during integrated cabling?

How do I deal with lightning protection requirements of optical fiber cables during integrated cabling?

With the development of the network, optical fiber is a medium used to transmit data in the Integrated Wiring System. Because of its advantages such as high transmission rate and long distance, optical fiber is increasingly used by people. As we all know, optical fiber is non-conductive and can withstand the impact of current, optical fiber also has good protection performance, metal components in the optical fiber cable insulation value is high, lightning current is not easy to enter the optical fiber cable, however, because the optical cable has a strong core, especially the Directly Buried optical cable has a armor layer, so when the optical cable line is struck by lightning, the optical cable can also be burned or damaged.

Today, I would like to explain in detail the main measures for Lightning Protection of optical fiber cables during the construction of the integrated wiring project.

Measure 1: for Lightning Protection of the cable line, the metal parts in the cable must be connected at the joint position in the local grounding mode, ensure that the cables of the relay segment are connected to the reinforcing core, Moisture protection layer, and armor layer. (2) In accordance with the provisions of the YDJ14-91, in the optical cable joint Moisture protection layer, armor layer and the strong core should be electrical disconnection treatment, and are not grounded, the ground is insulated, this can avoid the accumulation of inductive lightning current in the optical fiber cable, and avoid the introduction of lightning current into the optical fiber cable from the grounding device due to the difference in the ground loop Impedance Between the lightning protection line and the metal components of the optical fiber cable.

Measure 2: For overhead optical cables, electrical cables should be connected and grounded at intervals of 2km. When grounded, cables can be directly grounded or grounded through suitable surge protection devices. In this way, the cable has the protection function of the overhead ground.

3. After the optical cable enters the lightning box, the lightning box should be grounded. After the lightning current enters the metal layer of the cable, the lightning current can be quickly laid off to protect the cable. The Directly Buried optical cable has a armor layer and a strong core, and the outer jacket is PE (polyethylene) jacket, which can effectively prevent corrosion and prevent mouse bites.