Industrial Cable Manufacturer

Structure Sstainless steel tube Aluminum tube
Aluminum clad steel wire
Aluminum wire Description of central aluminum tube overhead optical ground wire

OPGW fiber integrates ground electrode and photo-communication functions all in cable one unit. This product is mainly applied to 35kV, 110kV, 220kV, 500kV, 750kV telecommunication lines of high voltage transmission systems built on stilts. OPGW fiber is also suitable for replacing old ground wires of high voltage transmission system built on stilts to add to existing optical communication lines, conduct short circuit current and protect the system from lightning strikes.

SPFO will carefully design the structure of the optical cable according to the specific service environment (like distance between towers, requirement of sag, ice load, wind load, allowed tensile force at the suspension point, message capacity, short circuit current and so on). Users can specify the structure as well.

Parameter Technical parameter

Item	Content	Typical value
	Quantity of optical fiber	2~48
Protecting tube 1	Material	stainless steel tube
	Diameter/mm	1.5~6
Protecting tube 2	Material	Aluminum
	Diameter/mm	6~12
Stranded single wire	Material	Aluminum clad steel, aluminum, aluminum rod
	Diameter/mm	1.5~6
Maximum outer diameter	mm	18
Maximum tensile force	kN	280
Maximum sectional area	mm²	200
Maximum short circuit current	400-200℃(Ka²*S)	100
Operating temperature	℃	-40~+65
Compressive resistance	N/100mm	1800
*The structure of optical cable and quantity of core can be custom-made according to customer requirements.

Characteristic of optical fiber

		G.652.D	G.655	50/125μm	62.5/125μm
Attenuation	@850nm	-	-	≤3.0dB/km	≤3.0dB/km
	@1300nm	-	-	≤1.0dB/km	≤1.0dB/km
	@1310nm	≤0.36dB/km	≤0.36dB/km	-	-
	@1550nm	≤0.22dB/km	≤0.23dB/km	-	-
Bandwidth	@850nm	-	-	≥500MHz·km	≥200MHz·km
	@1300nm	-	-	≥1000MHz·km	≥600MHz·km
Fiber cutoff wavelength		≤1260nm	≤1260nm	-	-
Polarization mode dispersion	Single optical fiber	≤0.20ps/√km	≤0.20ps/√km	-	-
Link value (M=20, Q=0.01%)		≤0.10ps/√km	≤0.10ps/√km	-	-

Main machinery and environment performance

Item	Inspection standard	procedure of inspection	Requirements
tension	IEC 60794-4-10	According to the change of optical cable's structure	Additional attenuation≤0.05dB
pressure	IEC 60794-20-9.4.5	2200N/100mm, 10min, 3 times interval 1m	Additional attenuation≤0.1dB, non-mechanical damage
Backward and forward bending	IEC 60794-4-20-9.4.3	R=15~20*D	Additional attenuation≤0.05dB, non-mechanical damage
seepage test	IEC 60794-4-10-9.8	Length of sample:0.5m, 20±5℃, height of the water: 1m, 1h	Non-seepage
dripping test	IEC 60794-4	Length of sample:0.3m, 70±1℃, 24h	The filler and composition won't outflow or drip out.
temperature recycle test	IEC 60794-4-20-9.6	-40℃~+70℃	Additional attenuation≤0.1dB

Features
The optical unit of this product is protected by its aluminum tube, so the anticorrosion performance of optical fiber is good. The current will minimally affect the optical fiber in the case of a short circuit. This optical fiber has the characteristics of vibration fatigue. The aluminum tube will protect the stainless steel tube from generating stress at the stainless steel welded joints. Compared with ordinary stainless steel tube, the optical fiber extra length of this product is relatively easy to control.