Aluminum Clad Steel Tube - OPGW Optical Ground Wire

OPGW 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.

OPGW Conductor 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

Cable OPGW 48 Fibras Typical Design
 

Code name	Structure(No.*Dia./AS) n*mm/AS		Area mm2		Dia.	Linear mass	Rated strength	DC resistance	Short current capcacity
	Center	Outer layer	AS	Total	mm	Kg/km	KN	Ω/km	KA2S
OPGW-24B1-42[54;8.4]	1×3.0/24B1	6×3.0/20AS	42.41	42	9	309	54	2.03	8.4
OPGW-24B1-42[43.5;10.6]		6×3.0/27AS	42.41	42	9	281	43.5	1.53	10.6
OPGW-24B1-42[35.5;11.5]		6×3.0/30AS	42.41	42	9	268	35.5	1.37	11.5
OPGW-30B1-48[61.4;10.9]	1×3.2/30B1	6×3.2/20AS	48.25	48	9.6	348	61.4	1.78	10.9
OPGW-30B1-48[49.5;13.7]		6×3.2/27AS	48.25	48	9.6	315	49.5	1.34	13.7
OPGW-30B1-48[40.3;14.9]		6×3.0/30AS	48.25	48	9.6	3.1	40.3	1.21	14.9
OPGW-30B1-51[63.9;12.3]	1×3.3/30B1	6×3.3/20AS	51.32	51	9.9	368	63.9	1.68	12.3
OPGW-30B1-51[52.7;15.5]		6×3.3/27AS	51.32	51	9.9	333	52.7	1.26	15.5
OPGW-30B1-51[42.9;16.8]		6×3.3/30AS	51.32	51	9.9	318	42.9	1.14	16.8
OPGW-30B1-51[33.2;20.8]		6×3.3/40AS	51.32	51	9.9	268	33.2	0.85	20.8
OPGW-36B1-54[67.8;13.9]	1×3.4/36B1	6×3.4/20AS	54.48	54	10.2	389	67.8	1.58	13.9
OPGW-36B1-54[55.9;17.5]		6×3.4/27AS	54.48	54	10.2	352	55.9	1.19	17.5
OPGW-36B1-54[45.5;19]		6×3.4/30AS	54.48	54	10.2	336	45.5	1.07	19
OPGW-36B1-54[35.2;23.4]		6×3.4/40AS	54.48	54	10.2	283	35.2	0.8	23.4
OPGW-40B1-58[69.6;15.6]	1×3.5/40B1	6×3.5/20AS	57.73	58	10.5	410	69.6	1.49	15.6
OPGW-40B1-58[59.2;19.6]		6×3.5/27AS	57.73	58	10.5	371	59.2	1.12	19.6
OPGW-40B1-58[48.3;21.3]		6×3.5/30AS	57.73	58	10.5	354	48.3	1.01	21.3
OPGW-40B1-58[37.3;26.3]		6×3.5/40AS	57.73	58	10.5	298	37.3	0.76	26.3
OPGW-48B1-61[73.7;17.5]	1×3.6/48B1	6×3.6/20AS	61.07	61	10.8	432	73.7	1.41	17.5
OPGW-48B1-61[62.7;22]		6×3.6/27AS	61.07	61	10.8	391	62.7	1.06	22
OPGW-48B1-61[51.1;23.8]		6×3.6/30AS	61.07	61	10.8	373	51.1	0.95	23.8
OPGW-48B1-61[39.5;29.5]		6×3.6/40AS	61.07	61	10.8	313	39.5	0.72	29.5
OPGW-50B1-65[76.6;19.5]	1×3.7/50B1	6×3.7/20AS	64.51	65	11.1	455	76.6	1.33	19.5
OPGW-50B1-65[66.2;24.5]		6×3.7/27AS	64.51	65	11.1	411	66.2	1	24.5
OPGW-50B1-65[53.9;26.6]		6×3.7/30AS	64.51	65	11.1	392	53.9	0.9	26.6
OPGW-50B1-65[41.7;32.9]		6×3.7/40AS	64.51	65	11.1	329	41.7	0.68	32.9
OPGW-54B1-68[80.8;21.7]	1×3.8/54B1	6×3.8/20AS	68.05	68	11.4	478	80.8	1.26	21.7
OPGW-54B1-68[69.8;27.3]		6×3.8/27AS	68.05	68	11.4	432	69.8	.0.95	27.3
OPGW-54B1-68[56.9;29.6]		6×3.8/30AS	68.05	68	11.4	412	56.9	0.86	29.6
OPGW-54B1-68[44;36.6]		6×3.8/40AS	68.05	68	11.4	346	44	0.64	36.6
OPGW-60B1-75[86.7;26.6]	1×4.0/60B1	6×4.0/20AS	75.4	75	12	527	86.7	1.14	26.6
OPGW-60B1-75[77.4;33.5]		6×4.0/27AS	75.4	75	12	476	77.4	0.86	33.5
OPGW-60B1-75[63;36.3]		6×4.0/30AS	75.4	75	12	453	63	0.77	36.3
OPGW-60B1-75[48.7;44.9]		6×4.0/40AS	75.4	75	12	380	48.7	0.58	44.9

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(AL-Tube)-1S 48	48	44	0.1218	81.39	0.469	11.9	0.316	0.47	17075	7745
OPGW(AL-Tube)-1S 48	48	55	0.1218	81.39	0.469	11.9	0.259	0.385	10820	4908
OPGW(AL-Tube)-1S 48	48	55	0.133	88.87	0.488	12.4	0.327	0.487	16850	7643
OPGW(AL-Tube)-1S 48	48	66	0.133	88.87	0.488	12.4	0.28	0.416	11541	5235
OPGW(AL-Tube)-1S 48	48	64	0.143	95.56	0.504	12.8	0.351	0.522	18470	8378
OPGW(AL-Tube)-1S 48	48	76	0.143	95.56	0.504	12.8	0.299	0.445	12644	5735
OPGW(AL-Tube)-1S 48	48	66	0.1481	98.99	0.512	13	0.378	0.562	20831	9449
OPGW(AL-Tube)-1S 48	48	76	0.1481	98.99	0.512	13	0.331	0.493	14174	6429
OPGW(AL-Tube)-1S 48	48	76	0.1586	106.01	0.528	13.4	0.403	0.599	22024	9990
OPGW(AL-Tube)-1S 48	48	94	0.1586	106.01	0.528	13.4	0.33	0.491	14105	6398