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Optical Power Ground Wire(OPGW) for Transmission Line

OPGW (Optical Power Ground Wire) is also called Optical Fiber Composite Overhead Ground Wire.

OPGW (Optical Power Ground Wire) is also called Optical Fiber Composite Overhead Ground Wire. The main function is to place the optical fiber in the ground wire of the overhead high-voltage transmission line to form the OPGW optical fiber communication network on the transmission line. This structure has the dual functions of ground wire and communication, and is generally called OPGW optical cable. ZMS produces high-quality OPGW cables, complete product production and customization experience, competitive price advantages, fast and effective delivery capabilities, and better product service capabilities. If you want to know more about aerial optical fiber cable products, please contact us.


Introduction to OPGW

The OPGW optical cable is more reliable, stable and firm due to the metal wire wrapping. Because the overhead ground wire and the optical cable are combined as a whole, compared with other methods of optical cables, the construction period is shortened and the construction cost is saved. In addition, if the OPGW made of aluminum-clad steel wire or aluminum alloy wire is used, it is equivalent to erecting a good conductor overhead ground wire, which can reduce the submerged current of the transmission line, reduce the power frequency overvoltage, and improve the power line to the communication line. The interference and dangerous effects of the multi-faceted benefits. Because the optical fiber has the characteristics of anti-electromagnetic interference, light weight, etc., it can be installed on the top of the transmission line tower without having to consider the best mounting position and electromagnetic corrosion. Therefore, OPGW has significant characteristics such as higher reliability, superior mechanical performance, and lower cost. This technology is especially suitable and economical when laying or replacing existing ground wires.

 

OPGW Application

OPGW optical cables are mainly used on lines with voltage levels of 500KV, 220KV, and 110KV. Affected by factors such as line power outages, safety, etc., they are mostly used in newly-built lines.

The applicable features of OPGW are:

(1) Lines with high voltage exceeding 110kv have a relatively large range (generally above 250M);

(2) It is easy to maintain, easy to solve the problem of line crossing, and its mechanical characteristics can meet the requirement of large line crossing;

(3) The outer layer of OPGW is metal armor, which has no effect on high voltage electric corrosion and degradation;

(4) OPGW must be powered off during construction, and the power loss is relatively large, so OPGW should be used in newly built high-voltage lines above 110kv;

(5) In OPGW's performance indicators, the greater the short-circuit current, the more it is necessary to use good conductors for armoring, and the tensile strength will be reduced accordingly. In the case of a certain tensile strength, the short-circuit current capacity must be increased. The metal cross-sectional area leads to an increase in cable diameter and cable weight, which poses a safety issue to the strength of the line tower.


OPGW -12B1 Parameters

Project

Unit

Guarantee Value

Optical Fiber

Type

--

G.652

Quantity

Core

12B1

Damping

1310nm

dB/km

0.35

1550nm

dB/km

0.21

Sectional Area

Bearing Sectional Area

mm2

54.5

AS Area

mm2

54.5

AA Area

mm2

0.0

Stainless Steel Pipe Area:

mm2

2.0

Total Sectional Area

mm2

56.5

Outer Layer Stranding Direction

--

Right

External Diameter

mm

10.20

Unit Weight

kg/km

385.1

Rated Breaking Force (RTS)

kN

67.8

20℃ DC Resistance

Ω/km

1.557

Short Circuit Current Capacity (40℃~200℃,0.25s)

kA2·s

21.3

Short Circuit Current

KA

9.2

Rally to Weight Ratio

km

18.0

Elastic Modulus

kN/mm2

162.0

Linear Expansion Coefficient

1×10-6/

13.0

Maximum Allowable Working Tension (MAT)

kN

27.1

Average Annual Operating Tension (EDS)

kN

17.0

Allowable Minimum Bending Radius

mm

Construction:204

Operational:153

Storage Temperature

-40+70

Maximum Delivery Length

m

6000


Optical Fiber Cable

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