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Structure of Stranded Loose Tube Single Steel Wire Armored Cable

Armored steel wire
Optical Fiber
The optical gel is filled in optical cables before they completed and sheaths are applied to pass waterproof tests and infiltration tests.
The buffer tuber is one kind of the thermoplastic material and is made of polypropylene can nylon. The buffer tuber can be put in fiber cable loosely and protect optical fiber from interior stress and outer side pressure.
The central strength member: phosphatized steel wire, high-count fiber cable and extruded polyethylene.
The water proofing material: filling compound.
The damp-proof layer: aluminum-plastic tape.
The inner jacket uses black polyethylene and is easy to lay and transport.
Armored layer: steel-plastics tape
The outer jacket uses black polyethylene and is easy to lay and transport.

Description of Stranded Loose Tube Single Steel Wire Armored Cable

The cable features an insert of single-mode or multi-mode into loose tube made of high modulus polyester material and filled with water proof compounds. The center of cable core is a metallic strength core. For the cables with a certain number of cores, the metallic strength core sheathed with polyethylene (PE). The loose tube (and filling rope) is twisted around the central strength core to form a compact circular core, whose cracks are filled with water blocking materials. Extruded polyethylene sheath is inserted into cable after the double chromium-plated plastic steel tape is vertically wrapped. Finally, an extruded polyethylene sheath into cable after armored of single steel wire.

Application of Stranded Loose Tube Single Steel Wire Armored Cable

The stranded loose tube single steel wire armored cable is suitable for Long distance and interoffice communication.

Parameter

1. Technical parameter

Item	Content	Value
Item	Number of cable cores	24	36	48	72	96	120	144
Loose tube	Outer diameter	1.8	2.5	2.5	2.5	2.5	2.5	2.5
Loose tube	Number of Loose Tube* number of cores per tube	4*6	6*6	4*12	6*12	8*12	10*12	12*12
Reference outer diameter	mm	18.5	18.5	20.0	21.0	22.5	24.5	26.0
Center strength member	Steel wire	Steel wire
Water blocking material	Water blocking cable gel	Water blocking cable gel
Damp-proof layer	/	/
Armored layer	Corrugated aluminium belt	Corrugated aluminium belt
Inner sheath	1.0	1.0
Armored layer	Corrugated steel belt	Corrugated steel belt
Inner sheath	1.0	1.0
Armored layer	Single galvanized steel wire	Single galvanized steel wire
Outer sheath	Thickness0.2mm	1.8
Range of operating temperature		-40- +70
Pull	short-term /long-term(N)	8000/2000
Flatten	short-term /long-term(N)	6000/3000
*According to customers requirements, the stranded loose tube armored cable can customize other structures or cores.

2. Characteristic of optical fiber

		G.652.D	G.655	50/125m	62.5/125m
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	-	-
Band width	@850nm	-	-	500MHzkm	200MHzkm
Band width	@1300nm	-	-	1000MHzkm	600MHzkm
Fiber cutoff wavelength		1260nm	1260nm	-	-
Polarization Mode Dispersion	Single optical fiber	0.20ps/km	0.20ps/km	-	-
Link valueM=20Q=0.01%		0.10ps/km	0.10ps/km	-	-

3. Main machinery and environment performance

Item	Inspection standard	Specified value	Requirements
Pull	IEC 60794-1-2-E1	According to technical parameter	Additional attenuation for short term:0.1dB
Flatten	IEC 60794-1-2-E3	According to technical parameter	Additional attenuation for short term0.1dB
Impact	IEC 60794-1-2-E4	The height is 1 meter punch hammer 450g at least 50 times	Residual additional attenuation:0.03dB
Backward and forward bending	IEC 60794-1-2-E6	Loading 150N 30times	Residual additional attenuation:0.03dB
Twisting	IEC 60794-1-2-E7	1meter 180 10 times	Residual additional attenuation:0.03dB
Temperature recycle test	IEC 60794-1-2-F1	-40 +70	Change of additional attenuation:0.05dB/km
* The monitoring of all optical fiber attenuations change is operated in wavelength of 1550nm.

Features

We control the optical fiber's surplus length accurately to ensure the capability of resisting tension and temperature characteristics.
The material of loose tube has good hydrolysis - resistant performance and high strength. The tube is filled with special ointment to make key protection for optical fiber.
The polyethylene sheath features good anti ultraviolet radiation performance.
We use the following measures to ensure outstanding water blocking performance.

Installation

Duct, Aerial, Directly buried