OPGW tension clamp

1. Introduction to OPGW optical cable products:

[OPGW optical cable] is also called optical fiber composite overhead ground wire. It is to place optical fiber in the ground wire of overhead high-voltage transmission line to form an optical fiber communication network on the transmission line. This structural form has both ground wire and communication functions and is generally called OPGW optical cable. Because optical fiber has the characteristics of anti-electromagnetic interference and light weight, it can be installed on the top of the transmission line tower without considering the best hanging position and electromagnetic corrosion. Therefore, OPGW has the remarkable characteristics of high reliability, superior mechanical properties and low cost.

The OPGW optical cable produced by Shandong Luxintong Optoelectronic Technology Co., Ltd. is suitable for various new power lines and the transformation of existing power lines due to its high tensile strength and special short-circuit current design.

2. Main structural forms of OPGW products:

(1) Classification:

A: According to the different materials of the optical unit protection tube, the OPGW structural type is divided into stainless steel tube type and aluminum tube type (including aluminum-clad stainless steel tube type).

B: According to the different positions of the optical unit in the OPGW structure, the OPGW structure type is divided into a central tube structure and a layer twisted structure.

C: For stainless steel tube OPGW, according to the number of optical units, the OPGW structure type is divided into single optical unit OPGW, double optical unit OPGW and multi-optical unit OPGW.

D: According to the twisting layer and the material of the twisted single wire, the OPGW structure type is divided into an all-aluminum-clad steel structure (the twisted single wires are all aluminum-clad steel wires) and a mixed twisted structure (the twisted single wires include aluminum-clad steel wires and aluminum alloy wires).

(2) Typical OPGW structure type:

The OPGW optical cables currently produced by Shandong Luxintong Optoelectronic Technology Co., Ltd. are typical OPGW structures, namely: central tube structure and layer-twisted structure.

3. Main features of OPGW optical cable:

(1) Seamless stainless steel tube optical fiber protection design is adopted, and the tube is filled with imported fiber gel water-blocking compound to effectively protect the optical fiber;

(2) Through the optimization design of the optical fiber excess length and cable core twisting pitch in the stainless steel tube, the optical fiber in the optical cable obtains secondary excess length to ensure that the optical fiber is not stressed when the OPGW optical cable is subjected to large operating tension;

(3) The compact structure not only reduces the ice load and wind load, but also ensures that the heat generated in the short circuit is easy to dissipate, and has better resistance to lateral pressure and impact;

(4) The precisely designed optical cable cross section ensures the mechanical and electrical properties of the optical cable.

(5) For lines with high voltage exceeding 110kv, the span is large (generally more than 250M);

(6) Easy to maintain, easy to solve the problem of line crossing, and its mechanical characteristics can meet the large line crossing;

(7) The outer diameter and tensile unit weight ratio of OPGW optical cable are similar to the specifications of commonly used ground wires, and can be used to directly replace the original ground wire without changing the line or replacing the iron tower.

4. Common specifications and models of OPGW optical cable standard products:

Note: 1. Common core counts are 8/12/16/24/36/48 cores, and specific specifications can be customized according to customer needs.

5. Basic technical parameters of OPGW optical cable: See OPGW-11-70-1 parameter table

Notes:

(1) The above optical cable parameters are for reference only. Different manufacturers have different production processes and calculation methods, which will have a slight impact on the parameters;

(2) The number of optical fibers in the above optical cable parameters is the maximum number of optical fibers that can be accommodated by this structure. The optical fiber model can be B1, B4 or B1+B4 (B1: G.652; B4: G.655);

(3) Only when the outer layer is aluminum-clad steel monofilament (the diameter is not less than 3mm at 20%IACS and the diameter is not less than 3.2mm at 40%IACS), the lightning resistance can be based on 150C as the minimum guaranteed value;

(4) All parameters are for reference only as the minimum guaranteed value.

6. Application:

OPGW optical cable is mainly used on 500KV, 220KV, and 110KV voltage level lines. Affected by line power outages, safety and other factors, it is mostly used on newly built lines.

7. OPGW optical cable matching hardware:

Pre-twisted wire tension hardware: used for connection with terminal towers, tension towers, towers with an angle greater than 25° and splicing towers;

Pre-twisted wire suspension hardware: pre-twisted suspension wire clamps are connection hardware for hanging optical cables on transmission line towers;

Fasteners: realize the connection and installation of tension wire clamps and suspension wire clamps with towers;

Spiral vibration dampers: interference type vibration dampers, which consume the energy of optical cable vibration and suppress the vibration of optical cables;

Joint box: used for connection protection of OPGW optical cable joints;

Grounding wire: provides a path for short-circuit current when the system is grounded;

Protective strip: protects optical cables;

Excess cable rack: used to place excess optical cables when splicing optical cables;

Down-leading clamp: fastens the ADSS optical cable from the tower to the tower so that it cannot shake to avoid wear of the optical cable.