What Are The Lightning Protection Measures For Overhead Optical Cables?
1. Use a large egg-shaped isolator to electrically disconnect the hanging wire 3 meters in front of the terminal pole in the computer room. A medium-sized column isolator is used for electrical disconnection at the hanging wire joint. The general distance is 2 kilometers, and the longest distance should not exceed 2.5 kilometers. The second pole in front of the base station is used as a hanging device.
2. Lightning protection wire: It must be made where there are various pull wires. Its specifications are: use 4.0mm galvanized iron wire. 10 cm higher than the top of the pole, and tie two places 10 cm away from the top of the pole and the middle of the hoop from the top of the pole. The lower end is fixed in the hoop and wrapped around the guy wire 5 times to ensure good contact.
3. Directly buried ground wire: When the optical cable line crosses 10KV power, use 4.0mm galvanized iron wire to pass through the center of the pole. Leave 1 meter at the bottom of the pole and connect it to the ground body. Fold down the lightning protection wire at the top of the pole. Secure to the hanging wire with hanging wire splints.
4. General grounding: Make a general grounding on the pole before the terminal pole. The specific method is: use 4×4×4mm galvanized flat iron to trench vertically with the pole road, the depth is about 1 meter, the length of the flat iron is 1.2 meters, 3 The pole is driven into the ground with a gap of 2 meters, and welded together with a flat iron. It extends 6 meters at the bottom of the pole and is 1.2 meters deep. It is welded firmly to the grounding body.
5. When the optical cable is terminated in the computer room, the reinforcing core is electrically connected to the ground hole of the ODF frame.
6. When overhead optical cables and power lines intersect, install Ω-type insulated power protection tubes for protection. The protection tubes should exceed the width of the power lines by 2 meters on each side, and be firmly fixed and required to be neat and beautiful.