ET-TC 70 mm² 25kV 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: Multicore 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.

 

 

 

INSTALLATION CONDITIONS FOR CURRENT CARRYING CAPACITIES_MV MULTI-CORE CABLES

(1) Current carrying capacities based on NEC/NFPA 70 for installations were ducts and cables are not directly exposed to solar radiation.

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

INSTALLATION CONDITIONS FOR CURRENT CARRYING CAPACITIES_MV MULTI-CORE CABLES

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Copper
Conductor shape
-
Conductor flexibility
-
Construction type
-
Insulation
EPR
Outer sheath
PVC

Dimensional characteristics

Dimensional characteristics

Conductor cross-section (AWG/KCMIL)
-
Conductor cross-section
- kcmil
Conductor cross-section
70 mm²
Phase Conductor Cross Section
- mm²
Total number of wires
19
Phase Conductor Diameter
9.7 mm
Nominal insulation thickness
8.13 mm
Minimum insulation thickness
7.75 mm
Diameter over insulation
27.5 mm
Minimum outer sheath thickness
2.53 mm
Outer Diameter
35 mm
Nominal outer diameter
- mm
Approximate weight
1800 kg/km
Number of cores
-

Electrical characteristics

Electrical characteristics

Operating voltage
25 kV
Insulation Level
133 %
Maximum operating voltage
26.2 kV
Max. DC resistance of the conductor at 20°C
0.268 Ohm/km
A.C. Conductor resist. 50Hz and at 90 °C
0.342 Ohm/km
Inductive reactance at 50Hz
- Ohm/km
Perm current rating in air 40°C
307 A
Permissible current rating buried 20°C
319 A
Perm. Current in duct 20°C
271 A
Permissible short circuit current
- kA

Mechanical characteristics

Mechanical characteristics

Maximum pulling tension with pulling eyes
490 kgf

Usage characteristics

Usage characteristics

Laying operation bending radius
490 mm
Minimum Bend Radius - Installed
420 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
Oil resistance
ICEA S-93-639 (70°C/4h)
U.V resistance
UL 1581

Resources

Resources

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