Railway Cables

 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.

Standards

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

Construction

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

Colour scheme, unit binder colour and cable make-up according to NR/PS/TEL/00015

Pair Number
A Wire
B Wire
Unit Number
Binder Colour
Cable Size
Number and Pair Size of Unit
Centre
1st Layer
1
WHITE
BLUE
1
BLUE
2
1x2
-
2
WHITE
ORANGE
2
ORANGE
5
1x5
-
3
WHITE
GREEN
3
GREEN
10
1x10
-
4
WHITE
BROWN
4
BROWN
20
4x5
-
5
WHITE
GREY
5
GREY
20
2x10
-
6
RED
BLUE
6
WHITE
30
6x5
-
7
RED
ORANGE
7
RED
30
3x10
-
8
RED
GREEN
8
BLACK
50
5x10
-
9
RED
BROWN
9
YELLOW
50
1x10
4x10
10
RED
GREY
10
VIOLET
75
3x5
6x10
100
2x10
8x10
100
3x10
7x10
100
4x5
8x10

Dimensions And Weight

A-2Y(L)2Y n×2×0.63/0.9

Cable Code

Number of Pairs
(n)
Nominal Sheath
Thickness
mm
Maximum Overall
Diameter
mm
Nominal Weight
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
(n)
Nominal Sheath
Thickness
mm
Maximum Overall
Diameter
mm
Nominal Weight
kg/km
Inner
Outer
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