FREETOX 1x750 kcmil 12/20 (24) kV

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; IEC 60754-1; IEC 60754-2; IEC 61034-2
  • International
    NES 713

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, cable trays 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: Tree-Retardant crosslinked polyethylene (TR-XLPE)  or crosslinked polyethylene (XLPE) 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, 50% nominal overlap. Copper wires applied over the tape.

Oversheath: Low fire hazard polyolefin (LFH), flame and fire retardant, low smoke emision, resistant to weather and UV radiation. Color upon request.

 

Marking: NEXANS CHILE FREETOX "size" "Rated voltage" "Nominal Insulation Thickness" (1) Cu XLPE 90°C "Manuf. order" "Date"

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

Design Alternatives

FREETOX-RAT: Resistant to rodent attack.

FREETOX (ZAL): Armored cable with two flat aluminum tapes

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
Outer sheath
Low fire hazard Polyolefin
Halogen free
IEC 60754-1
Conductor flexibility
Class B
Conductor shape
Circular
Insulation
TR-XLPE (Tree-Retardant Cross-linked Polyethylene)
Lead free
Yes
Number of conductors
1

Dimensional characteristics

Dimensional characteristics

Conductor cross-section (AWG/KCMIL)
-
Conductor cross-section
750 kcmil
Conductor cross-section
380 mm²
Total number of wires
61
Phase Conductor Diameter
22.95 mm
Nominal insulation thickness
5.5 mm
Minimum insulation thickness
4.9 mm
Diameter over insulation
35.5 mm
Screen section
11.3 mm²
Minimum outer sheath thickness
1.64 mm
Approximate weight
4500 kg/km
Nominal outer diameter
41.0 mm

Electrical characteristics

Electrical characteristics

Operating voltage
20 kV
Insulation Level
- %
Maximum operating voltage
24 kV
Max. DC resistance of the conductor at 20°C
0.0472 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.0618 Ohm/km
Inductive reactance at 50Hz and 90°C flat spaced
0.154 Ohm/km
Perm current rating in air 40°C
870 A
Permissible current rating buried 20°C
796 A
Perm. Current in duct 20°C
695 A
Voltage Drop
0.25 V/A.km
Permissible short circuit current
170.6 kA

Mechanical characteristics

Mechanical characteristics

Maximum pulling tension with pulling eyes
2270 kgf
Maximum pulling tension with pulling grips
142 kgf

Usage characteristics

Usage characteristics

Laying operation bending radius
574 mm
Minimum Bend Radius - Installed
492 mm
Max. conductor temperature in service
90 °C
Overload maximum core temperature
130 °C
Short-circuit max. conductor temperature
250 °C
Flame retardant
IEC 60332-1-2
Fire retardant
IEC 60332-3-24 (cat C)
Smoke density
IEC 61034-2
Oil resistance
ICEA S-93-639 (70°C/4h)
U.V resistance
UL 1581
Minimum installation temperature
-10 °C

Resources

Resources

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