YJLV 8.7/10kV3×95
Keywords:
YJLV 8.7/10kV3×95
Category:
Description
Scope of Application
This product is suitable for transmission and distribution of power on lines with rated AC voltage of 35kV and below. It is often used in urban underground power grid, outgoing lines of power stations, internal power supply of industrial and mining enterprises and underwater power transmission lines crossing rivers and seas.
Standard Implemented
This product complies with GB/T 12706 Extruded Insulated Power Cables with Rated Voltage from 1kV (Um=1.2kV) to 35kV (Um=40.5kV), GB/T 12706.2 Part II: Rated Voltage from 6kV (Um=7.2kV) to 30kV (Um=36kV), and GB/T 12706.3 Part III: Rated Voltage 35kV (Um=40.5kV).
Usage Characteristics
1. The allowable long-term working temperature of cable conductor is:
The highest temperature of conductors of various insulated cables (GB/T12706.2 Part II)
|
Insulating compound |
Maximum temperature of conductor ℃ |
|
|
normal operation |
Short circuit (the longest lasting 5S) |
|
|
Polyvinyl chloride (PVC/A) |
70 |
160 |
The highest conductor temperature of the XLPE insulated composite cable (GB/T12706.3 Part III)
|
Insulating compound |
Maximum temperature of conductor ℃ |
|
|
normal operation |
Short circuit (the longest lasting 5S) |
|
|
Cross-linked polyethylene (XLPE) |
90 |
250 |
2. The ambient temperature during cable laying shall not be lower than 0℃;
3. Minimum allowable bending radius during cable laying:
|
Project |
Single core cable |
Multi-core cable |
||
|
Minimum bending radius of cable during installation |
Unarmored |
Armored |
Unarmored |
Armored |
|
20D |
15D |
15D |
12D |
|
|
Note: D is the outer diameter of the cable |
||||
4. Rated voltage
GB/T 12706.2 Part II: The rated power frequency voltage of the cable: U0/U (Um): 3.6/6 (7.2) kV, 6/6 (7.2) kV, 6/10 (12) kV, 8.7/10 (12) kV, 8.7/15 (17.5) kV, 12/20 (24) kV, 18/30 (36) kV;
GB/T 12706.3 Part III: The rated power frequency voltages of the cable: U0/U (Um): 21/35 (40.5) kV and 26/35 (40.5) kV.
U0: rated power frequency voltage between conductor and ground or metal shield for cable design;
U: rated power frequency voltage between conductors for cable design;
Um: the maximum value of the "highest system voltage" that the equipment can withstand.
Routine Tests
|
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 shall be in accordance with GB/T 3048.12-2007. When the voltage is 1.73 U0, there is no partial discharge, and the insulation has no breakdown after 5min voltage test.
The flame retardant, halogen-free and low-smoke cables meet the requirements of GB/T 19666-2019 and GB/T 18380-2008.
Common cable model
|
Model |
Name |
|
|
Copper core |
Aluminum core |
|
|
YJV |
YJLV |
XLPE insulated and PVC sheathed power cable |
|
The models in the table do not include flame retardant properties |
||
The flame retardant, halogen-free and low-smoke cables meet the requirements of GB/T 19666-2019 and GB/T 18380-2008.
Cable structure diagram and physical picture
Related products
Xiangguang 100 billion Industrial Park, Yanggu, Shandong