RT/ZHLS, A-2Y(L)2Y External Telephone Cables to NR/PS/TEL/00015

Application

The cables are designed primarily for trackside railway installation in non electrifi ed area. For direct burial application, brass tape armoured or Zetabon type corrugated steel tape armoured can be offered against rodent attack.

Standard

  • NR/PS/TEL/00015 (formerly RT/E/PS/00015 or GK/RT 0315)
  • TS0886/BR1822
  • BR892

Cable Construction

RT/ZHLS, A-2Y(L)2Y External Telephone Cables Railway Cable
Conductors Solid plain copper conductor, 0.63 or 0.9 mm nominal diameter.
Insulation Solid polyethylene to BS 6234.
Cabling Element Two insulated conductors are twisted together to form a pair.
Stranding Pairs are helically stranded in 10 pair units.
Core Wrapping Plastic tape(s) with overlapping.
Moisture Barrier One laminated sheath made of aluminium tape (0.15mm) coated with PE-Copolymer on at least one side is applied with longitudinally overlap.
Outer Sheath Polyethylene to BS 6234. LSZH compound option can be offered upon request.

Optional

  • Jelly Filled Cables: The cable core interstices are fi lled 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 Cables: Corrugated steel tape armour coated on both sides with copolymer can be applied over an intermediate sheath. The steel tape thickness is 0.145mm. Brass tape armour can be offered as an option.

Electrical Characteristics at 20℃

Nominal Conductor Diameter mm 0.63 0.9
Maximum Conductor Resistance Ω/km 60.0 30.0
Minimum Insulation Resistance @500 V DC (1min) MΩ.km 1500 1500
Maximum Conductor Capacitance @1000Hz (AC)
Maximum Average Value
For 20 pairs or less nF/km 70 79
More than 20 pairs nF/km 67 75
Maximum Individual Value 99% of pairs
Up to 20 pairs nF/km 79.0 85.0
More than 20 pairs nF/km 75.0 81.0
Maximum Capacitance Unbalance @1000Hz pair to pair (99% of pairs)
For 2 pairs (1 quad) pF/500m 800 800
All other sizes pF/500m 275 275
Dielectric Strength, conductor to screen (DC voltage 2mins) V 2000 2000
Maximum Average Attenuation
@1.0KHz dB/km 1.40 0.95
@2.4KHz dB/km 2.15 1.46
@1.024MHz dB/km 18.70 14.6
Minimum Average Near-end Crosstalk
@1.0KHz dB/km 70 70
@2.4KHz dB/km 65 65
@1.024MHz
Within Units dB/km 40 40
Between Units dB/km 47 47
High Voltage Breakdown Test
DC for 2mins V 2000 2000
AC for 2mins V 1333 1333

Mechanical and Thermal Properties

  • Minimum Bending Radius: 7.5×OD (unarmoured); 10×OD (armoured)
  • Temperature Range: -40℃ to +70℃ (during operation); -10℃ +60℃ (during installation)

Core Identification

Dimensions and Weight

A-2Y(L)2Y n×2×0.63/0.9

Cable Code Number of Pairs Nominal Sheath Thickness Maximum Overall Diameter Nominal Weight
  (n) mm mm kg/km
0.63mm Conductor, 1.15mm Insulated Wire
RS/RT/ZHLS-2Y(L)2Y-2P0.63 2 2.7 12.3 103
RS/RT/ZHLS-2Y(L)2Y-5P0.63 5 2.7 13.8 155
RS/RT/ZHLS-2Y(L)2Y-10P0.63 10 2.7 15.6 212
RS/RT/ZHLS-2Y(L)2Y-20P0.63 20 2.7 18.1 309
RS/RT/ZHLS-2Y(L)2Y-30P0.63 30 2.7 20.4 403
RS/RT/ZHLS-2Y(L)2Y-50P0.63 50 2.7 24.2 574
RS/RT/ZHLS-2Y(L)2Y-75P0.63 75 2.7 28.2 779
RS/RT/ZHLS-2Y(L)2Y-100P0.63 100 2.7 31.0 974
0.9mm Conductor, 1.5mm Insulated Wire
RS/RT/ZHLS-2Y(L)2Y-2P0.9 2 2.7 13.3 131
RS/RT/ZHLS-2Y(L)2Y-5P0.9 5 2.7 15.6 208
RS/RT/ZHLS-2Y(L)2Y-10P0.9 10 2.7 18.1 305
RS/RT/ZHLS-2Y(L)2Y-20P0.9 20 2.7 21.9 477
RS/RT/ZHLS-2Y(L)2Y-30P0.9 30 2.7 25.2 639
RS/RT/ZHLS-2Y(L)2Y-50P0.9 50 2.7 30.0 951
RS/RT/ZHLS-2Y(L)2Y-75P0.9 75 2.7 35.8 1325
RS/RT/ZHLS-2Y(L)2Y-100P0.9 100 2.7 39.1 1688

A-2Y(F)(L)2YB2Y n×2×0.63/0.9 Jelly Filled & Armoured Cables

Cable Code Number of Pairs Nominal Sheath Thickness Maximum Overall Diameter Nominal Weight
Inner Outer
  (n) mm mm mm kg/km
0.63mm Conductor, 1.15mm Insulated Wire
RS/RT/ZHLS-2Y(F)(L)2YB2Y-2P0.63 2 1.6 1.6 18.0 222
RS/RT/ZHLS-2Y(F)(L)2YB2Y-5P0.63 5 1.6 1.6 19.5 296
RS/RT/ZHLS-2Y(F)(L)2YB2Y-10P0.63 10 1.6 1.6 20.3 383
RS/RT/ZHLS-2Y(F)(L)2YB2Y-20P0.63 20 1.6 1.6 23.8 504
RS/RT/ZHLS-2Y(F)(L)2YB2Y-30P0.63 30 1.6 1.6 26.1 606
RS/RT/ZHLS-2Y(F)(L)2YB2Y-50P0.63 50 1.6 1.6 29.9 903
RS/RT/ZHLS-2Y(F)(L)2YB2Y-75P0.63 75 1.6 1.6 33.9 1202
RS/RT/ZHLS-2Y(F)(L)2YB2Y-100P0.63 100 1.6 1.6 36.7 1463
0.9mm Conductor, 1.5mm Insulated Wire
RS/RT/ZHLS-2Y(F)(L)2YB2Y-2P0.9 2 1.6 1.6 19.0 250
RS/RT/ZHLS-2Y(F)(L)2YB2Y-5P0.9 5 1.6 1.6 21.3 370
RS/RT/ZHLS-2Y(F)(L)2YB2Y-10P0.9 10 1.6 1.6 23.8 508
RS/RT/ZHLS-2Y(F)(L)2YB2Y-20P0.9 20 1.6 1.6 27.6 782
RS/RT/ZHLS-2Y(F)(L)2YB2Y-30P0.9 30 1.6 1.6 30.9 1000
RS/RT/ZHLS-2Y(F)(L)2YB2Y-50P0.9 50 1.6 1.6 35.7 1402
RS/RT/ZHLS-2Y(F)(L)2YB2Y-75P0.9 75 1.6 1.6 41.5 2055
RS/RT/ZHLS-2Y(F)(L)2YB2Y-100P0.9 100 1.6 1.6 44.8 2550