12.7/22kV Triplex

Description

Description

Standards

  • International
    IEC 60228; IEC 60502-2
  • National
    AS/NZS 1125; AS/NZS 1429.1

Stranded compacted conductor, triple extruded conductor screen, insulation and insulation screen, copper wire screened, water blocking taped, HDPE sheathed, laid up 'Triplex' cables.

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Armour type
-
Conductor material
Copper
Insulation
XLPE
Outer sheath
HDPE
Screen
Copper wire
Type of conductor
Stranded compacted

Dimensional characteristics

Dimensional characteristics

Approximate weight
1280.0 kg/100m
Conductor cross-section
300 mm²
Conductor diameter
20.7 mm
Diameter over insulation
33.2 mm
Diameter over screen
37.7 mm
Nominal Duct Diameter
125 mm
Nominal Screen Area on each core
68.7 mm²
Nominal insulation thickness
5.5 mm
Nominal overall diameter of each phase cable
43 mm
Nominal overall diameter of triplex
92.7 mm
Number of screen wires (nb x mm Ø)
48 x 1.35 mm Ø

Electrical characteristics

Electrical characteristics

A.C. Conductor resist. 50Hz and at 90 °C
0.079 Ohm/km
Capacitance (All Main Cores - Screen)
0.334 µF / km
Charging current per phase
1.334 A/km
DC Resistance of the Screen at 20°C
0.26 Ohm/km
Dielectric loss per phase
67.8 W/km
Inductive reactance at 50Hz
0.106 Ohm/km
Insulation resistance at 20°C
7200 MOhm.km
Max. DC resistance of the conductor at 20°C
0.06 Ohm/km
Maximum electric stress
2.8 kV/mm
Permissible short circuit current conductor 1s
42.9 kA
Permissible short circuit current screen 1s
10.19 kA
Rated Voltage Uo/U (Um)
-
Zero sequence reactance at 50HZ
0.053 Ohm/km
Zero sequence resistance at 20°C
0.325 Ohm/km

Mechanical characteristics

Mechanical characteristics

Maximum Pulling Tension
63 kN

Usage characteristics

Usage characteristics

Minimum Bending Radius of Cable Bundle During Pulling
1390 mm
Minimum Bending Radius of Cable Bundle Set in Position
930 mm
Minimum Bending Radius of Phase Cable During Pulling
1080 mm
Minimum Bending Radius of Phase Cable Set in Position
650 mm

Resources

Resources

Current carrying capacity table (in Amps) - 12.7/22kV Triplex

Current carrying capacity table (in Amps) - 12.7/22kV Triplex
Conductor cross-section
mm² Cu Al Cu Al Cu Al Cu Al Cu Al
300.0 608.0 479.0 647.0 509.0 445.0 352.0 539.0 427.0 466.0 369.0
In air touching
In air spaced from surface
In air enclosed
Underground direct touching
Underground ducts

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