Aluminum Tube - OPGW Optical Ground Wire

OPGW Fiber Optic Cable Applications
OPGW cable is suited for installation on transmission lines with the double function of a ground wire (designed to replace traditional static or shield wires) and a communication wire. OPGW conducts short circuit current and provide lightning resistance as it “shields” conductors, while providing a telecommunications path for internal as well as third party communications.  OPGW must be capable of withstanding the mechanical and environmental stresses inflicted on overhead cables (such those caused by wind or ice). OPGW must also be capable of handling electrical faults on the transmission line by providing a path to ground yet preventing damage to the delicate optical fibers inside the cable.

Fibra Opgw Construction
OPGW cable has two constructions:  
Central loose tube type---The fibers are placed loosely in a sealed and water resistant central, aluminum tube filled with water blocking gel. This tube provides protection to the fiber during installation and operation under severe environmental conditions.  The stainless steel tube may also be aluminum-clad steel depending on the engineering requirements. The stainless optical tube is located at the center of the cable protected by single or multiple layers of aluminum clad steel, aluminum alloy wires, or steel wires. The metallic wires provide mechanical strength to withstand severe installation and operating conditions, while achieving conductivity to control temperature rise during short circuit conditions.
Each optical fiber is clearly distinguishable utilizing a fiber identification system consisting of coloring and the number of ring marks on it. This compact design features high mechanical strength and fault current rating within a smaller diameter. The smaller diameter also results in excellent sag tension performance.
Multi loose tube type--- The fibers is placed loosely in a sealed and water resistant stainless steel tube filled with water blocking gel. Two or three stainless steel optical tubes are helically stranded in the inner layer of a multiple-layer cable.  The multi loose tube type is designed mostly for very high fiber count requirement over 48 with the maximum fiber count reaching 144. The multi loose tube type can meet the requirement of huge cross and large current capacity.
The optical fiber is made of high pure silica and germanium doped silica. UV curable acrylate material is applied over fiber cladding as optical fiber primary protective coating. The detail data of optical fiber performance are shown in the following table.
Optical fiber uses special spun device successfully controlled the value of PMD, and makes sure that it can keep stable in cabling

Opgw Manufacturer Standards 

1. IEC 60793-1 Optical fiber Part 1: Generic specifications
2. IEC 60793-2 Optical fiber Part 2: Product specifications
3. ITU-T G.652 Characteristics of a single-mode optical fiber cable
4. ITU-T G.655 Characteristics of a non-zero dispersion-shifted single-mode optical fiber and Cable
5. EIA/TIA 598  Color code of fiber optic cables
6. IEC 60794-4-10 Aerial optical cables along electrical power lines – Family specification for OPGW
7. IEC 60794-1-2 Optical fiber cables-Part 1-2: Generic specification - Basic optical cable test procedures
8. IEEE1138-2009 IEEE Standard for testing and performance for optical ground wire (OPGW) for use on electric utility power lines
9. IEC 61232 Aluminum – clad steel wire for electrical purposes
10. IEC 60104 Aluminum magnesium-silicon alloy wire for overhead line conductors
11. IEC 61089 Round wire concentric lay overhead electrical stranded conductors
12. Fiber is Corning SMF-28e+ Optical Fiber

Opgw In Transmission Line

Item #	FIBERS	FAULT CURRENT (KA2sec)	TOTAL CONDUCTOR AREA (in2)	TOTAL CONDUCTOR AREA (mm2)	OVERALL DIAMETER (IN)	OVERALL DIAMETER (mm)	WEIGHT (lb/ft)	Weight (kg/km)	RBS (lbs)	RBS (kb)
OPGW(L-AL_Tube)-1S 8	8	43	0.1195	79.88	0.496	12.6	0.3	0.447	16197	7347
OPGW(L-AL_Tube)-1S 8	8	63	0.1195	79.88	0.516	13.1	0.272	0.404	11338	5143
OPGW(L-AL_Tube)-1S 8	8	88	0.1694	113.19	0.571	14.5	0.421	0.626	22902	10388
OPGW(L-AL_Tube)-1S 8	8	101	0.1694	113.19	0.571	14.5	0.369	0.549	15410	6990
OPGW(L-AL_Tube)-1S 12	12	43	0.1195	79.88	0.496	12.6	0.301	0.448	16219	7357
OPGW(L-AL_Tube)-1S 12	12	63	0.1195	79.88	0.516	13.1	0.272	0.404	11338	5143
OPGW(L-AL_Tube)-1S 12	12	67	0.1494	99.86	0.544	13.8	0.376	0.56	20426	9265
OPGW(L-AL_Tube)-1S 12	12	78	0.1461	97.62	0.544	13.8	0.329	0.49	13790	6255
OPGW(L-AL_Tube)-1S 24	24	69	0.1481	98.96	0.54	13.7	0.362	0.538	19257	8735
OPGW(L-AL_Tube)-1S 24	24	83	0.1481	98.96	0.54	13.7	0.298	0.443	12350	5602
OPGW(L-AL_Tube)-1S 24	24	83	0.1622	108.39	0.559	14.2	0.393	0.585	21147	9592
OPGW(L-AL_Tube)-1S 24	24	101	0.1622	108.39	0.559	14.2	0.323	0.481	13565	6153
OPGW(L-AL_Tube)-1S 36	36	98	0.1741	116.36	0.595	15.1	0.417	0.621	21619	9806
OPGW(L-AL_Tube)-1S 36	36	111	0.1741	116.36	0.595	15.1	0.368	0.548	14758	6694
OPGW(L-AL_Tube)-1S 36	36	124	0.1978	132.14	0.626	15.9	0.478	0.712	25150	11408
OPGW(L-AL_Tube)-1S 36	36	141	0.1978	132.14	0.626	15.9	0.422	0.628	17119	7765
OPGW(L-AL_Tube)-1S 48	48	153	0.2148	143.52	0.646	16.4	0.499	0.742	25510	11571
OPGW(L-AL_Tube)-1S 48	48	179	0.2196	146.73	0.65	16.5	0.454	0.676	18087	8204
OPGW(L-AL_Tube)-1S 48	48	253	0.2814	188	0.725	18.4	0.673	1.001	35139	15939
OPGW(L-AL_Tube)-1S 48	48	305	0.2814	188	0.725	18.4	0.555	0.826	22699	10296
OPGW(L-AL_Tube)-1S 72	72	159	0.2178	145.55	0.677	17.2	0.504	0.75	25556	11592
OPGW(L-AL_Tube)-1S 72	72	184	0.2206	147.41	0.677	17.2	0.435	0.648	17727	8041
OPGW(L-AL_Tube)-1S 72	72	188	0.2394	160	0.701	17.8	0.569	0.846	29672	13459
OPGW(L-AL_Tube)-1S 72	72	213	0.2394	160	0.701	17.8	0.503	0.749	20585	9337