Application

The cables are designed for use as connection between central offices. The cables are suitable for installation in ducts, direct burial in the ground and also for aerial installation with integral suspension strand. Jelly filled option is for subscriber’s cables installed underground or along the edge of pavement. An armoured option is offered for direct burial installations. A figure-8 self support option is offered for aerial installation.

Standards

• DIN VDE 0816

Construction

Conductors
Solid annealed bare copper 0.4/0.6/0.8mm, as per class 1 of DIN VDE 0295/ BS 6360/IEC 60228

Insulation
Cellular polyethylene 2YI2 type as per VDE 0207-2

Twisted Pairs
Insulated conductors are twisted into pairs with varying lay length to minimize crosstalk

Cabling Element
Star Quads

Cable Core Assembly
4 Cores are twisted into star quad. 5 star quads are stranded into a basic unit. 5 or 10 basic units each are stranded into one main unit. The star quads are grouped in units and stranded in layers to form the cable core.Standard make up is per VDE 0816 in the Cable Make Up Diagram

Core Wrapping
One or more non-hygroscopic polyester tapes are helically or longitudinally laid with an overlap. These tapes furnish thermal, mechanical as well as high dielectric protection between shielding and individual conductors

Moisture Barrier
A layer of aluminium tape (0.2mm) coated with PE-copolymer on one or both sides is applied longitudinally with overlap over the cable core to provide 100% electrical shielding coverage and ensures a barrier against water vapor

Sheath
Black low or medium density polyethylene 2YM2 type as per VDE 0207-3, being able to withstand exposure to
sunlight, temperature variations, ground chemicals and other environmental contaminants

Ripcord
Ripcord may be provided for slitting the sheath longitudinally to facilitate its removal

Spare Pairs (optional)
Spare pairs may be provided for large pair cables

Continuity Wire (optional)
Tinned copper drain wire may be longitudinally laid to ensure electrical continuity of the screen

Optional Construction

Jelly Filled Cable
The cable core interstices are filled with petroleum jelly to avoid longitudinal water penetration within the cable. The water resistant filling compound is applied to the air space between non-hygroscopic tape and shield,shield and sheath within the cable core

Armoured Cable
Corrugated steel tape armour is applied over an optional inner polyethylene sheath with an overlap. An outer polyethylene sheath is applied over the armour

Type Code

A-	Outdoor Cable
02Y	Cellular Polyethylene (FOAM PE) insulation
F	Continuous core filling
(L)2Y	Laminated sheath(copolymer-coated aluminium tape laminated to PE outer sheath)
SR	Corrugated steel tape
b	Armouring
T	Messenger of galvanized steel wires
StIII	Star quad in local cables
Bd	Unit-type stranding

 

          
        
            
    
         
            
        

 

Electrical Properties

Nominal Conductor Diameter	mm	0.4	0.6	0.8
Conductor Gauge Size	AWG	26	-	20
Conductor Size	mm2	0.126	0.283	0.5
Maximum Average Conductor Resistance @20°C	Ω/km	143	63	34.6
Minimum Insulation Resistance @500V DC	MΩ.km	5000	5000	5000
Maximum Mutual Capacitance @800Hz  95% of all values	nF/km	40	40	40
100% of all values	nF/km	42	42	42
Capacitance Unbalance @800Hz pair-to-pair
K1          100% of values  max	pF/500m	980	800	800
98% of values   max	pF/500m	420	400	400
K9-12    100% of values  max	pF/500m	800	300	300
90% of values   max	pF/500m	200	100	100
Maximum Conductor Loop Resistance @20°C	Ω/km	300	130	73.2
Impedance @0.8KHz	Ω	994	665	500
Maximum Average Attenuation @0.8KHz	dB/km	1.45	0.91	0.68
Dielectric Strength 50Hz
Conductor to Conductor (2mins)	V AC	500	500	500
Conductor to Screen (2mins)	V AC	2000	2000	2000
Maximum Operating Voltage Peak Value	V	150	225	225
Nominal Insulation Thickness  (Air Core)	mm	0.20	0.25	0.3
(Jelly Filled)	mm	0.26	0.36	0.44
Nominal Insulated Conductor Diameter (Air Core)	mm	0.8	1.1	1.4
(Jelly Filled)	mm	0.92	1.32	1.68

 

 

 

 

 

 

 

 

 

 

 

 

Mechanical and Thermal Properties

Temperature range during operation (fixed state): -30°C – +70°C
Temperature range during installation (mobile state): -20°C – +50°C
Minimum bending radius: 10 x Overall Diameter (unarmoured cables);15 x Overall Diameter (armoured cables)

Colour Code

Quads
The single core is identified by black ring markings:

Side Circuit 1	a-wire	without marking
	b-wire	1 mark distance 17mm
Side Circuit 2	a-wire	2 marks distance 34mm
	b-wire	2 marks distance 17mm

 

 

 

Subunits
Basic colours for the wire insulation of the 5 star quads of a basic unit:

Quad 1 Red	Quad 2 Green
Quad 3 Grey	Quad 4 Yellow	Quad 5 White

The tracer units are coded with a red helix, all other units by a white binder

Dimensions And Weight
Cellular PE Insulated and LAP Sheathed Air Core Cable VDE CODE: A-02Y(L)2Y …x2x0.4/0.6/0.8 StIII Bd

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