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Covered Protected Aluminum Cable (ABNT NBR 11873)

Covered Protected Aluminum Cable (ABNT NBR 11873)

ABNT NBR 11873 Medium Voltage Protected Aluminum Cable; Covered cables with polymeric material, voltage class 15 kV, 25 kV and 35 kV, for electrical overhead distribution lines.
Aerial Insulated Protected Cables Application
Aerial Insulated Cables/Protected Cables with voltages from 13.8kV - 34.5kV of spacer cable. Protected Cables is suitable for compact primary networks of medium voltage power distribution. The protected cable coverage is resistant to electrical tracking and weather. This increases the reliability of the overhead line distribution, which prevents discharges and shutdowns, in occasional contacts with grounded objects and trees.
Aerial Insulated Protected Cables Construction
Conductor: 1350 aluminum wires, compact class 2 cording, with longitudinal moisture blocking,according to NBR NM 280.
Semiconductor layer: Thermostable material (XLPE) or thermoplastic (PE) (even for 35 kV cables, optional for 15 and 25kV cables).
Protective layer: This cover, applied simultaneously with the semiconductor layer, can be made up of one or two layers of thermostable material (XLPE), or two layers of polyethylene LDPE/HDPE or XLPE/HDPE. in the case of cables that have two layers. , the internal one will be colorless and the external one will be the one that has the indicated coloration.
Aerial Insulated Protected Cables Maximum Operating Temperatures
In continuous regime:90℃
In overload:100℃
In short circuit:250C
Aerial Insulated Protected Cables Reference Standards
ABNT NBR 11873 - Cables covered with polymeric material for power distribution networks fixed in spacers, in voltajes from 13,8 to 34.5 kV.
ABNT NBR NM280-Conductors of insulated cables (IEC 60228, MOD).

Aerial Insulated Protected Cables 15kV

Section (mm) Conductor Diameter (mm) Coverage - Thickness (mm) Coverage - Diameter (mm) Nominal Weight (kg/km)
35 6,95 3 13,3 184
50 8,15 3 14,6 226
70 9,65 3 16,1 297
95 11,45 3 18 384
120 12,95 3 19,5 462
150 14,4 3 21 546
185 16,15 3 22,8 672
240 18,29 3 25 843
300 20,65 3 27,4 1021

Aerial Insulated Cables Protected Cables 25kV

Section (mm) Conductor Diameter (mm) Coverage - Thickness (mm) Coverage - Diameter (mm) Nominal Weight (kg/km)
35 6,95 4 15,4 225
50 8,15 4 16,6 271
70 9,65 4 18,2 346
95 11,45 4 20 437
120 12,95 4 21,6 520
150 14,4 4 23,1 608
185 16,15 4 24,9 739
240 18,29 4 27,1 916
300 20,65 4 29,5 1101

Aerial Insulated Cables Protected Cables 35kV

Section (mm) Conductor Diameter (mm) Coverage - Thickness (mm) Coverage - Diameter (mm) Nominal Weight (kg/km)
70 9,65 7,6 26,8 879
95 11,45 7,6 28,7 953
120 12,95 7,6 30,2 1028
150 14,4 7,6 31,7 1129
185 16,15 7,6 33,5 1230
240 18,29 7,6 35,7 1333
300 20,65 7,6 38,2 1437

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