English
The Central Tube Optical Ground Wire (OPGW) is a type of cable that is used in overhead power lines. Such cable combines the functions of grounding and communications. An OPGW cable contains a tubular structure with one or more optical fibers in it, surrounded by layers of steel and aluminum wire. The OPGW cable is run between the tops of high-voltage electricity pylons. The conductive part of the cable serves to bond adjacent towers to earth ground, and shields the high-voltage conductors from lightning strikes.
Typical design for Single Layer OPGW Cable:
|
Specification |
Fiber Count |
Diameter |
Weight |
RTS |
Short Circuit |
|
(mm) |
(kg/km) |
(KN) |
(KA2s) |
||
|
OPGW-32(40.6;4.7) |
12 |
7.8 |
243 |
40.6 |
4.7 |
|
OPGW-42(54.0;8.4) |
24 |
9 |
313 |
54 |
8.4 |
|
OPGW-42(43.5;10.6) |
24 |
9 |
284 |
43.5 |
10.6 |
|
OPGW-54(55.9;17.5) |
36 |
10.2 |
394 |
67.8 |
13.9 |
|
OPGW-61(73.7;175) |
48 |
10.8 |
438 |
73.7 |
17.5 |
|
OPGW-61(55.1;24.5) |
48 |
10.8 |
358 |
55.1 |
24.5 |
|
OPGW-68(80.8;21.7) |
54 |
11.4 |
485 |
80.8 |
21.7 |
|
OPGW-75(54.5;41.7) |
60 |
12 |
459 |
63 |
36.3 |
|
OPGW-76(54.5;41.7) |
60 |
12 |
385 |
54.5 |
41.7 |