Detailed Product Description
Concentric Conductor Power Cable
■ Application
The product is suitable for electric power transmission and
distribution network circuit with rated voltage 0.6/1kV and including.
■ Product Characteristic
1. It has lower and uniform positive (inverted) sequence and zero sequence impedance, which can
improve the quality of electricity supplied.
2. Comparing with the fourth core of common 4-core cable, the reactance value of concentric
conductor is much lower than the working condition of zero sequence, which can improve
sensitive action of short-circuit auto-protection device and can ensure cable and relative equipment
for safe operation.
3. It has strong properties of anti-electromagnetic interference and anti-thunder strike.
4. Five-core cable is suitable for power supply of TN-S and TN-C-X system.
■ Type designation and specification
|
Type
|
Designation
|
Number of core
|
Nominal Cross-section
mm2
|
|
Copper conductor
|
Aluminum conductor
|
|
VV-T
YJV-T
|
VV-T
YJV-T
|
Copper(Al)core PVC (XLPE) insulated and sheathed round(flat)concentric power cable
|
3+1 (T)
4+1 (T)
|
4~300
|
|
VV22-T
YJV22-T
|
VLV22-T
YJLV22-T
|
Copper(Al)core PVC (XLPE) insulated and sheathed steel tape armored round(flat)concentric power cable
|
|
VV32-T
YJV32-T
|
VLV32-T
YJLV32-T
|
Copper(Al)core PVC (XLPE) insulated and sheathed fine steel wire round(flat)concentric power cable
|
|
VV42-T
YJV42-T
|
VLV42-T
YJLV42-T
|
Copper(Al)core PVC (XLPE) insulated and sheathed thick steel wire round(flat)concentric power cable
|
|
Note: Include flame-retardant and fire-resistant type.
|
■ Schematic figuration of structure
1. Conductor
2. Insulation
3. Filler
4. Wrapped tape
5. Inner separator
6. Outer conductor
7. Wrapped tape
8. Outer sheath
■ Technical parameter
1. D.C. resistance of conductor is referenced to the cable with PVC insulation and sheath.
2. The finished cable shall be subjected to A.C. voltage of 50Hz 3500V 5min and result should not be breakdown.
As far as single core is concerned, it should make voltage resistant test after immersing water.
3. DC resistance value at 20℃.
|
Nominal cross sectional mm2
|
Ω/km at 20℃
|
Ω/km of each sequence
|
|
Copper core
|
Aluminum core
|
Positive
(negative)
|
Zoro sequence
|
|
4
|
4.564
|
7.336
|
0.0989
|
0.1479
|
|
6
|
3.049
|
4.564
|
0.0937
|
0.1380
|
|
10
|
1.812
|
3.049
|
0.0843
|
0.1320
|
|
16
|
1.139
|
1.891
|
0.0799
|
0.1236
|
|
25
|
0.7200
|
1.188
|
0.0791
|
0.1194
|
|
35
|
0.5190
|
0.8590
|
0.0758
|
0.1176
|
|
50
|
0.3830
|
0.6350
|
0.0755
|
0.1146
|
|
70
|
0.2650
|
0.4390
|
0.0733
|
0.1125
|
|
95
|
0.1920
|
0.3180
|
0.0730
|
0.1098
|
|
120
|
0.1520
|
0.2520
|
0.0716
|
0.1081
|
|
150
|
0.1230
|
0.2050
|
0.0714
|
0.1041
|
|
185
|
0.0985
|
0.1630
|
0.0713
|
0.1022
|
|
240
|
0.0750
|
0.1240
|
0.0711
|
0.0951
|
|
300
|
0.0597
|
0.0994
|
0.0708
|
0.0888
|
|
Note: Electrical resistance is similar for copper core cable with equal or different cross-section
|
■ Delivery length
Delivery length of single piece is not less than 100m, short section with length not less than 20m, is permitted, but the quantity shall not exceed in ±10% of total quantity.
Any length of cable can be delivered as per mutual agreement.
The tolerance of length shall not exceed in ±0.5%.
