This product is suitable for AC lines with rated voltages of 35kV and below, for power transmission and distribution. It is commonly used in urban underground power grids, power station outgoing lines, internal power supplies for industrial and mining enterprises, and underwater transmission lines crossing rivers and seas.
Implementation standards
This product complies with GB/T12706 "Extruded Insulated Power Cables with Rated Voltages of 1kV (Um=1.2kV) to 35kV (Um=40.5kV)", GB/T12706.2 Part 2: Rated Voltages of 6kV (Um=7.2kV) to 30kV (Um=36kV) and GB/T12706.3 Part 3: Rated Voltage of 35kV (Um=40.5kV)
Usage Features
1.The allowable long-term operating temperature of the cable conductor is：
Maximum conductor temperature of various insulation compound cables (GB/T12706.2 Part 2）
|
Insulation mixture |
Maximum conductor temperature ℃ |
|
|
Normal operation |
Short circuit (lasts up to 5 seconds) |
|
|
polyvinyl chloride（PVC/A） |
70 |
160 |
Maximum conductor temperature of XLPE insulation compound cable (GB/T12706.3 Part 3）
|
Insulation mixture |
Maximum conductor temperature ℃ |
|
|
Normal operation |
Short circuit (lasts up to 5 seconds) |
|
|
Cross-linked polyethylene (XLPE) |
90 |
250 |
2.The ambient temperature during cable laying must not be lower than 0°C；
3.Minimum bending radius allowed when laying cables：
|
project |
Single-core cable |
Multi-core cable |
||
|
Minimum bending radius of the cable during installation |
No armor |
Armored |
No armor |
Armored |
|
20D |
15D |
15D |
12D |
|
|
Note: D is the outer diameter of the cable |
||||
Routine test
|
Rated voltage U0 (kV) |
6 |
8.7 |
12 |
18 |
21 |
26 |
|
Test voltage U (kV) |
21 |
30.5 |
42 |
63 |
73.5 |
91 |
|
Duration (min) |
5 |
5 |
5 |
5 |
5 |
5 |
Partial discharge tests must comply with GB/T3048.12-2007. At a voltage of 1.73 U0, there must be no partial discharge, and no insulation breakdown during a 5-minute voltage test.
The performance of flame-retardant, halogen-free and low-smoke cables complies with the requirements of GB/T19666-2019 and GB/T18380-2008.
Common cable models
|
model |
name |
|
|
copper core |
Aluminum core |
|
|
YJV |
YJLV |
Cross-linked polyethylene insulated PVC sheathed power cable Cross-linked polyethylene insulated PE or polyolefin sheathed power cable Cross-linked polyethylene insulated steel tape armored PVC sheathed power cable Cross-linked polyethylene insulated steel tape armored PE or polyolefin sheathed power cable Cross-linked polyethylene insulated fine round steel wire armored PVC sheathed power cable Cross-linked polyethylene insulated fine round steel wire armored PE or polyolefin sheathed power cable |
|
The models in the table do not include flame retardant properties |
||
The performance of flame-retardant, halogen-free and low-smoke cables complies with GB/T19666-2019 and GB/T18380-2008 regulations。
Cable structure diagram and actual
picture
