Power Flexible Cable for telecommunication Power Spply Application
It is used to bransmit and distribute power of A .C rated voltage 0.6./1kV or lower for power system. It has not only better performance of PVC insulation power cable but also advantages of softness and flexibility as well.
Executive standard: YD/T 1173-2001
Type and Description
|
Type
|
Description
|
|
RV
|
Soft power cable with Cu core, PVC insulation
|
|
RVZ
|
Soft power cable with Cu core, PVC insulation,flame retardance
|
|
RVV
|
Soft power cable with Cu core, PVC insulation and sheath
|
|
RVVZ
|
Soft power cable with Cu core, PVC insulation & sheath,flame retardance
|
|
RVV22
|
Soft power cable with Cu core, PVC insulation & sheath,steel tape armor
|
|
RVVZ22
|
Soft power cable with Cu core, PVC insulation & sheath,steel tape armor,flame retardance
|
Production scope
|
Type
|
Core number
|
mm2
Nominal cross section area
|
|
RV RVZ
RVV RVVZ
|
1
|
1.5~400
|
|
RVV RVVZ
RVV22 RVVZ22
|
2
|
1.5~185
|
|
RVV RVVZ
RVV22 RVVZ22
|
3
|
1.5~300
4~300
|
|
RVV RVVZ
RVV22 RVVZ22
|
4
|
4~185
|
|
RVV RVVZ
RVV22 RVVZ22
|
3+1
|
4~300
4~240
|
|
RVV RVVZ
RVV22 RVVZ22
|
3+2
|
4~240
10~240
|
Working Condition
1: Max temperature of cable conductor for Long-term working is 70℃.
2: Min environment temperature for installing cable is 0℃.
3: Bending radium allowed by cable : It will be no less than 8 times that of cable O.D for inarmored cable and 20 times that of cable O.D for armored cable .
4: Max. working temperature of cable conductor is 160℃ during short circuit (the longest lasting time shall be no more than 5 seconds).
Main Technical Parameter
Max DC resistance value of conductor at 20℃ shall meet the requirements of the following bable:
|
Nominal cross section area (mm2)
|
1.5
|
2.5
|
4
|
6
|
10
|
16
|
25
|
35
|
50
|
|
Max.DC resistance of conductor at 20℃(Ω/km)
|
13.3
|
7.98
|
4.95
|
3.30
|
1.91
|
1.21
|
0.780
|
0.554
|
0.326
|
|
Nominal cross section area (mm2)
|
70
|
95
|
120
|
150
|
185
|
240
|
300
|
400
|
500
|
|
Max.DC resistance of conductor at 20℃ (Ω/km)
|
0.272
|
0.206
|
0.161
|
0.129
|
0.106
|
0.0801
|
0.0641
|
0.0495
|
0.0391
|
Min insulation resistance at 70℃
|
(mm2)
Nominal cross section area
|
(MΩ.km)
Min insulation resistance at 70℃
|
(mm2)
Nominal cross section area
|
(MΩ.km)
Min insulation resistance at 70℃
|
|
1.5
|
0.010
|
70
|
0.0032
|
|
2.5
|
0.009
|
95
|
0.0032
|
|
4
|
0.007
|
120
|
0.0029
|
|
6
|
0.006
|
150
|
0.0029
|
|
10
|
0.0056
|
185
|
0.0029
|
|
16
|
0.0046
|
240
|
0.0028
|
|
25
|
0.0044
|
300
|
0.0028
|
|
35
|
0.0038
|
400
|
0.0026
|
|
50
|
0.0037
|
/
|
/
|
|
Testing condition：1.Testing length : 5m. 2.Time of immersion in the water is one hour .
3.Temperature of water is 70℃
|
A.C. Voltage test under power frequency
The finished cable shall bear A.C. voltage test of 50Hz listed in the following bable without puncture.
|
Core NO.
|
Testing method
|
(m)
Sample length
|
Voltage V
|
Lasting time
|
|
Rated voltage
|
Testing voltage
|
5 min
|
|
Single core
|
Lmmersing in the water 1h
|
Manufacturing length
|
450/750
|
2500
|
|
Multi-core and armoring
|
Interphase
|
600/1000
|
3500
|
*Suitable for RV type and RVZ type .
Approximate outer diameter and current loading capacity of cable
By comparing with common power cable of the same specification with PVC insulation and sheath,cable outer diameter is bigger by 2~10mm for cable with cross section of 95mm 2 or lower and by 12~20mm for cable with cross section of 120 mm 2 or higher. And cable weitht generally remains heavier by 4%~10%. About current-loading capacity allowed by soft power cable ,you can refer to that of VV series power cable of the same specifi-cation with a drop of 6%~10%.
Delivery Length
Delivery length of cable depends on both agree-ments with length error allowance of ±0.5%.
