Railway Cables

G7621 Trackside Communications Cables

Application

The cables are designed for installation in trackside bracket runs and for use in open locations (type1) or in tunnels or underground locations (type2).

Standards

● LUL Spec G7621 A2 type 1 (for PVC sheath)
● LUL Spec G7621 A2 type 2 (for LSZH sheath)

Construction

Conductors
Solid plain copper, 0.63/0.9 mm nominal diameter.

Insulation
Cellular polyethylene.

Cabling Element
Two insulated conductors are twisted together to form a pair.

Core Wrapping
Non-hygroscopic plastic tape with overlapping.

Outer Sheath
PVC/LSZH sheath, coloured violet.

Core Identification

1 Pair Cable: Blue/White
3 Pair Cable: Blue/White Orange/White Green/White

Electrical Characteristics at 20℃

Nominal Conductor Diameter
mm
0.63
0.9
Maximum Conductor Resistance
Average Value
Ω/km
57.5
28
Individual Value
Ω/km
59
29
Minimum Insulation Resistance @500 V DC
MΩ.km
1500
1500
Maximum Average Mutual Capacitance
nF/km
59
59
Maximum Average Capacitance Unbalance
Pair to Pair
pF/460m
100
100
Pair to Earth
pF/460m
1200
1200

Mechanical and Thermal Properties

Minimum Bending Radius: 7.5×OD
Temperature Range: -30℃ to +70℃ (during operation); -10℃ +55℃ (during installation)

Dimensions And Weight

Cable Code
No. of pairs
Nominal Thickness of Sheath
mm
Nominal Overall Diameter
mm
Nominal Weight
kg/km

0.63mm Conductor, 1.15mm Insulated Wire

RS7621A2/T1-02YY-1P0.63

1

2.5

7.0

60

RS7621A2/T1-02YY-3P0.63

3

2.5

9.0

90

0.9mm Conductor, 1.5mm Insulated Wire

RS7621A2/T1-02YY-1P0.9

1

2.5

8.0

70

RS7621A2/T1-02YY-3P0.9

3

2.5

10.0

120