Scope of application:
Apply to extruded insulated power cable with U0≤8.7kV
—Single-core, three-core cables—Copper or aluminum conductor
—Metal tape shield or metal wire shield
—Metal tape armoured or metal wire armoured
Application:
Indoor terminal: It is installed at the end of the cable running in the indoor environment (not exposed to wind, frost, rain, snow and sunlight), connected to power supply devices such as switchgear and transformer or busbar.
Outdoor terminal: It is installed at the end of the cable running in the outdoor environment (can withstand wind, frost, rain, snow and sunlight), connected to power supply devices such as overhead cable, busbar, transformer and fuse or overhead cable.
Straight-through joint: It is installed in the middle of a running cable, used to connect two sections of cable lines.
Technical Parameter：
|
Conform to and pass GB/T12706.4-2020 rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) extruded insulated power cable and accessories part four: rated voltage 6kV (Um=7.2kV) to 35kV (Um=40.5kV) power cable accessories testing requirements and IEC60502-4:2005 rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) extruded insulated power cable and accessories part four: rated voltage 6kV (Um=7.2kV) to 30kV (Um=36kV) power cable accessories testing requirements. |
| Serial Number | ltem | Standard Parameter Value |
| 1 |
Power frequency withstand voltage test |
39kV, 5 min, no breakdown, no flashover |
| 2 |
Direct-current withstand voltage test |
35kV, 15 min, no breakdown, no flashover |
| 3 |
Partial discharge test |
Discharge is not greater than 10pC at 15kV |
| 4 |
Impulse voltage test |
95kV, 10 times each for positive and negative polarity |
| 5 |
Constant voltage load cycle (in the air) |
22kV, heated to 95-100℃, keep stable for 2 hours and circulate 30 times |
| 6 |
Constant voltage load cycle (in water) |
22kV, heated to 95-100℃, keep stable for 2 hours and circulate 30 times |
| 7 |
Short circuit thermal stability (cross-section of cable is 400 square millimeters） |
40.9kA,3s,2 times |
| 8 |
Short circuit dynamic stability (cross-section of cable is 400 square millimeters） |
177.0kA,10ms,1 time |
| 9 |
Power frequency withstand voltage test |
22kV, 15 min, no breakdown, no flashover |
| 10 |
Outdoor terminal salt spray test |
11kV，1000h |
| 11 |
Indoor terminal humidity test |
11kV，300h |
| 12 |
Immersion test of intermediate joint |
2.5u0, heated to 95-100℃, keep stable for 2 hours and complete the immersion cycle for 30 times |
 |
Prev
Back
