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Structure of Central Tube Steel Wire Armored Cable

Ooptical fiber
The optical gel is water-proof compounding and filled in optical cables before they completed and sheaths to make waterproof test and infiltration test.
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.
Armored steel wire: low carbon steel wire
The water proofing material: filling compound
Armored layer: steel-plastics tape
The outer jacket uses black polyethylene and is easy to lay and transport.

Description of Central Tube Cable

We insert a single-mode or multi-mode into a loose tube made of high modulus polyester material and filled with water proof compounds. The external of loose tube is vertical wrapped double chromium-plated plastic steel tape. Water blocking material is added between the steel belt and loose tube to ensure the compact and vertical water blocking of the cable. We extrude a polyethylene sheath into the cable by placing steel plastic composite tape.

Application of Central Tube Steel Wire Armored Cable

The central tube steel wire armored cable(GYXTS) is suitable for Long distance and interoffice communication.

Parameter

1. 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	-	-
Band width	@850nm	-	-	≥500MHz·km	≥200MHz·km
Band width	@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	-	-

2. Technical parameter

Item	Content	Value
Item	Number of cable cores	6	12	24	36	48
Loose tube	Outer diameter	2.6	2.8	2.8	3.2	3.6
Loose tube	Number of Loose Tube* number of cores per tube	1*6	1*12	1*24	1*36	1*48
Reference outer diameter	mm	9.5	9.5	9.5	10.0	10.5
Center strength member	Material	Steel wire
Center strength member	Diameter(mm)	1.0
Water blocking material	Material	Water blocking cable gel
Armored layer	Material	Corrugated steel belt
Outer sheath	Thickness(±0.2mm)	1.8
Range of operating temperature	℃	-40- +70
Pull	Short-term /long-term(N)	3000/1000
Flatten	Short-term /long-term(N)	3000/1000
*According to customer's requirements, the stranded loose tube armored cable can customize other structures or cores.

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 term:≤0.1dB
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 30 times	Residual additional attenuation:≤0.03dB
Twisting	IEC 60794-1-2-E7	1 meter ±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 attenuation's change is operated in wavelength of 1550nm.

Features

We control the optical fiber's surplus length accurately to ensure the good capability of resisting tension and temperature characteristics.
The steel wire armoring has good anti-side pressure performances and bullet-proof capability.
The double coated plastic steel tape can improve cable's moisture resistance capacity.
The polyethylene sheath has good anti-ultraviolet radiation performance. And the polyethylene sheath has small diameter, light weight and is easy to installation.
When users use the optical cable, they can choose the installation methods of duct, aerial, direct burial and so on.

Standards

YD/T 769-2010 central tube outdoor cable for telecommunication

Installation

Duct, Aerial, Direct burial