Liaoning OPGW-24B1-150 fiber optic cable manufacturer Ningxia OPGW fiber optic cable price

Description :

　　OPGW fiber optic cable (also known as fiber optic composite overhead ground wire) is a structure in which optical fibers are placed in the ground wire of overhead high-voltage transmission lines to form a fiber optic communication network on the transmission lines. This structure has dual functions of ground wire and communication, and is generally referred to as OPGW fiber optic cable. A 250 μ m optical fiber is inserted into a loose tube made of high modulus material, and the loose tube is filled with waterproof compound. A layer of double-sided plastic coated steel strip (PSP) is wrapped longitudinally outside the loose tube, and a water-resistant material is added between the steel strip and the loose tube to ensure the compactness and longitudinal water resistance of the optical cable. Two parallel steel wires are placed on both sides and extruded into a polyethylene sheath to form the cable.

　　Characteristics: 1. Lines with high voltage exceeding 110kV have a large span (usually above 250M).

　　2. Easy to maintain, easy to solve for line crossing problems, and its mechanical characteristics can meet the requirements for large line crossings.

　　3. The outer layer of OPGW is metal armor, which has no effect on high-voltage corrosion and degradation.

　　4. OPGW must be powered off during construction, and the losses caused by power outages are significant. Therefore, OPGW should be used in the construction of new high-voltage lines above 110kV.

　　OPGW optical cables are mainly used on 500KV, 220KV, and 110KV voltage level lines. Due to factors such as power outages and safety, they are often applied on newly built lines. Lines with high voltage exceeding 110KV have a large span (usually above 250M). Easy to maintain, easy to solve for line crossing problems, and its mechanical characteristics can meet the requirements for large line crossings; The outer layer of OPGW is metal armor, which has no effect on high-voltage corrosion and degradation.

　　Process standard method:

　　1. The sag of the tight wire should be checked immediately after hanging the wire, and its allowable deviation should comply with the following regulations:

　　2. In general, the allowable deviation for 110kV transmission lines is ≤+5% and -2.5%; Allowable deviation for 220kV and above lines is ≤± 2.5%;

　　3. The allowable deviation of sag for large spans crossing navigable rivers is ≤± 1%, and its positive deviation is ≤ lm.

　　4. When crossing power lines, the clearance distance between the optical cable and the crossed conductor should comply with the regulations when the crossed conductor is in a large sag state.

　　5. When hanging the line, the over traction length for ten isolated gears, small tension sections, and large spans shall not exceed the design value.

　　6. The construction of optical cable installation should use tension pay off.

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