Optical Fibre Composite Overhead Ground Wire (Uni-tube)

Optical Ground Wire (OPGW) – The Ultimate Solution for Utility Communications

Optical Ground Wire, or OPGW, is a cutting-edge technology that integrates both grounding and fiber optic communication capabilities into a single overhead cable. Designed for high-voltage transmission lines ranging from 110kV to 750kV, OPGW offers a versatile and cost-effective solution for modern utility communication needs.

Characteristics

• Stainless steel tubes filled with hydrophobic gel provide the protection and support of the optical fibres
• Good tensile performance
• Small diameter, light weight, low additional load to the tower
• Appropriate fibre excess length of optical unit easliy to make

Optical Fibre Characteristics

	Attenuation				Bandwidth		Polarization Mode Dispersion
	@850nm	@1300nm	@1310nm	@1550nm	@850nm	@1300nm	Individual Fibre	Design Link Value (M=20, Q=0.01%)
G652D	—	—	≤0.35dB/km	≤0.21dB/km	—	—	≤0.20ps/ km	≤0.1ps/ km
G655	—	—	—	≤0.22dB/km	—	—	≤0.20ps/ km	≤0.1ps/ km
50/125μm	≤3.0dB/km	≤1.0dB/km	—	—	≥600MHz.km	≥1200MHz.km	—	—
62.5/125μm	≤3.5dB/km	≤1.0dB/km	—	—	≥200MHz.km	≥600MHz.km	—	—

	Classification	Material	Value
Construction	Optical Fibre	G652D/G655 etc.	2 – 48
	Protection Tube	Stainless steel tube	1.5 – 6mm
	Stranded Line	AS wire/AA wire/Al Rod	1.5 – 6mm
	Max. Diameter		18mm
	Max. Cross Section		200mm2
Characteristic	According to the standards as DL/T 832, IEC60794-4-10, IEEE1138
	Max. Tensile Strength (RTS ) (kN)		280
	Max. Crush Strength（N/100mm）		2200
	Max. Short Current Capacity (40℃-200℃)(kA2s)		100
	Min. Bending Radius (Dynamic)		20D
	Min. Bending Radius (Static)		15D
Environment Performance	Installation (℃)		-10 to +50
	Transportation and Operation (℃)		-40 to +65

Note: D is cable diameter.

Specific Type and Technical Data

No.	Technical Data
	Product Type	Structure Type	Max. Fibre Count	Section of AS Wire (mm2)	Diameter （mm）	Cable Weight (kg/km)	Rate Tensile Strength （kN）	20℃DC Resistance （Ω/km）	Short Time Current Capacity （40-200℃ kA2.s）
1	OPGW-24B1.3-40-[51;9]	6/3.0/20AS, Optical Unit 1/3.0	24	≈40	9.0	≤304	≥51	≤2.10	≥9
2	OPGW-24B1.3-50-[58;11.5]	6/3.2/20AS, Optical Unit 1/3.2	24	≈50	9.6	≤345	≥58	≤1.82	≥11.5
3	OPGW-48B1.3-70-[77;24]	6/3.8/20AS, Optical Unit 1/3.8	48	≈70	11.4	≤475	≥77	≤1.30	≥24
4	OPGW-48B1.3-70-[42;38]	6/3.8/40AS, Optical Unit 1/3.8	48	≈70	11.4	≤340	≥42	≤0.70	≥38

**Other optical fibre type and count, stranded wire are available om request.

Mechanical and Environmental Test Characteristics

Item	Test Method	Requirements
Tension	IEC 60794-1-2-E1 Load: according to cable structure Sample length: no less than 10m, linked length no less than100m Duration time: 1min	40%RTS no additional fibre strain（0.01%）, no additional attenuation (0.03dB). 60%RTS        fibre        strain≤0.25%，additional        attenuation≤0.05dB (No additional attenuation after test).
Crush	IEC 60794-1-2-E3 Load: according to above table, three points Duration time: 10min	Additional attenuation at 1550nm ≤0.05dB/fibre; No damage to the elements
Water Penetration	IEC 60794-1-2-F5B Time : 1 hour Sample length: 0.5m Water height: 1m	No water leakage.
Temperature Cycling	IEC 60794-1-2-F1 Sample length: No less than 500m Temperature range: -40℃ to +65℃ Cycles:   2 Temperature cycling test dwell time: 12h	The change in attenuation coefficient shall be less than 0.1dB/km at 1550nm.

Packaging and Drum

• Standard Cable Drum
• Standard reel length: 2/3km/reel, other length is also available