ET-TC 250 kcmil 15kV 133%IL

Description

Description

Standards

  • Product
    ASTM B 3; ASTM B 496; ASTM B 8; ICEA S-93-639; IEC 60228; IEC 60502-2
  • Test
    IEC 60332-1-2; IEC 60332-3-24 Cat.C

Applications

Power shielded cable for fixed installations, used for connection of transformers, switchgears, GIS substations, motors, generators, feeders in distribution networks. Suitable to be installed directly buried, buried in ducts, in conduits, in tray cables or in free air.

Construction: Singlecore cable.

Conductor: Compact-round stranded copper conductor. For AWG and kcmil sizes: class B according to ASTM B-3, ASTM B8 and ASTM B-496 according to requirements of ICEA S-93-639. For standard mm² sizes: class 2 according to IEC 60228.

Conductor shield: Extruded semiconducting material.

Insulation: Ethylene propylene rubber (EPR) with excellent electrical properties, good resistance to ozone and chemical agents.

Insulation shield: Extruded semiconducting material.

Metallic shield: Copper tape applied helically in intimate contact with the underlaying semiconducting layer. 12% mimimum overlap.

Oversheath: Polyvinyl Chloride (PVC), flame retardant and fire retardant according to IEC 60332-3-24 Cat. C.  Resistant to weather and UV radiation. Color upon request.

 

Marking: NEXANS CHILE ET-TC "size" "Rated voltage" Cu EPR "Nominal Insulation Thickness" 90°C "Manuf. order" "Date"

(1) Nominal Insulation Thickness information on marking only applies for cables according to ICEA S-93-639.

Design Alternatives

ET-RAT: Resistant to rodent attack.

 

HFFR alternative:

FREETOX-E Medium Voltage

 

INSTALLATION CONDITIONS FOR CURRENT CARRYING CAPACITIES_MV CABLES

(1) Current carrying capacities based on ICEA P-46-426, for installations were ducts and cables are not directly exposed to solar radiation.

De-rating factors must be applied according to specific installation conditions.

INSTALLATION CONDITIONS FOR CURRENT CARRYING CAPACITIES_MV CABLES

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Copper
Conductor shape
Circular
Conductor flexibility
Class B
Insulation
EPR
Outer sheath
PVC

Dimensional characteristics

Dimensional characteristics

Conductor cross-section (AWG/KCMIL)
-
Conductor cross-section
250 kcmil
Conductor cross-section
127 mm²
Phase Conductor Cross Section
127 mm²
Total number of wires
37
Phase Conductor Diameter
13.2 mm
Nominal insulation thickness
5.59 mm
Minimum insulation thickness
5.33 mm
Diameter over insulation
26.0 mm
Screen section
6.4 mm²
Minimum outer sheath thickness
2.53 mm
Outer Diameter
33 mm
Nominal outer diameter
33.0 mm
Approximate weight
2200 kg/km
Number of cores
1

Electrical characteristics

Electrical characteristics

Operating voltage
15 kV
Insulation Level
133 %
Maximum operating voltage
15.7 kV
Max. DC resistance of the conductor at 20°C
0.141 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.18 Ohm/km
Inductive reactance at 50Hz and 90°C flat spaced
0.175 Ohm/km
Perm current rating in air 40°C
445 A
Permissible current rating buried 20°C
442 A
Perm. Current in duct 20°C
378 A
Voltage Drop
0.43 V/A.km
Permissible short circuit current
57 kA

Mechanical characteristics

Mechanical characteristics

Maximum pulling tension with pulling eyes
889 kgf
Maximum pulling tension with pulling grips
170 kgf

Usage characteristics

Usage characteristics

Laying operation bending radius
462 mm
Minimum Bend Radius - Installed
396 mm
Max. conductor temperature in service
90 °C
Overload maximum core temperature
130 °C
Short-circuit max. conductor temperature
250 °C
Minimum installation temperature
-10 °C
Fire retardant
IEC 60332-3-24 (cat C)
Flame retardant
IEC 60332-1-2
Oil resistance
ICEA S-93-639 (70°C/4h)
U.V resistance
UL 1581

Resources

Resources

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