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ADDISON<br />
PE Insulated Air Core/Jelly Filled Star Quad Railway Signalling<br />
Cables (RF 0.3)<br />
APPLICATION<br />
The <strong>cable</strong>s are designed to give good protection to the core against inductive<br />
interference (RF=0.3).The <strong>cable</strong>s are used for outdoor signaling equipment.<br />
STANDARDS<br />
• RENFE E.T. 03.365.051.6<br />
CONSTRUCTION<br />
• Conductors: Solid annealed bare copper 0.9/1.4mm as per ASTM B-3/class 1 of IEC 60228.<br />
• Insulation: Solid polyethylene as per ASTM D 1248/IEC 60708.<br />
• Cabling Element: Four insulated conductors are twisted together to form a quad.<br />
• Cable Core Assembly: The cores are <strong>cable</strong>d together in concentric layers to form the <strong>cable</strong> core. Units are identified by<br />
colour coded binders.<br />
• Core Wrapping: One or more non-hygroscopic polyester tapes are helically or longitudinally laid with an overlap.<br />
• Electrostatic Screen: Corrugated copper tape of 0.12mm is applied longitudinally with overlap.<br />
• Bedding: PE or LSZH.<br />
• Electrostatic Armour: Two steel tapes of 0.5mm are helically applied with gap. The outer tape will cover the gap left by<br />
the inner one.<br />
• Sheath: PE, PVC or LSZH.<br />
• Ripcord: Nylon ripcord may be placed parallel to the cores to facilitate sheath removal.<br />
ELECTRICAL PROPERTIES<br />
Nominal Conductor Diameter mm 0.9 1.4<br />
Conductor Size mm 2 0.636 1.539<br />
Maximum Conductor Resistance @20°C Ω/km 28 12.1<br />
Minimum Insulation Resistance @500V DC MΩ . km 35000 5000<br />
Reduction Factor Rk (50Hz) Induced Voltage Em 100V/Km 0.3 0.3<br />
Induced Voltage Em 500V/Km 0.5 0.5<br />
Maximum Resistance Unbalance % 2.5 2.5<br />
Maximum Mutual Capacitance @0.8Hz nF/km 45 50<br />
Maximum Capacitance Unbalance @1KHz pair-to-pair pF/500m 250 250<br />
140 Caledonian Telephone Cables www.addison-<strong>cable</strong>s.com www.<strong>caledonian</strong>-<strong>cable</strong>s.co.uk