Scope of application:
Suitable for extruded insulated power cables with U0≤8.7kV
l Single-core, three-core cable
l Copper or aluminum conductor
l Extruded semi-conductive shielding layer or semi-conductive tape shielding
l Metal tape shielding or metal wire shielding
l Armored or unarmored
l Metal tape armoring or metal wire armoring
use:
Indoor terminal: The end of a cable installed in an indoor environment (not subject to wind, frost, rain, snow and sunlight) and connected to switch cabinets, transformers and other power supply equipment or busbars.
Outdoor terminal: The end of a cable installed in an outdoor environment (able to withstand wind, frost, rain, snow and sunlight) and connected to overhead lines, busbars, transformers, fuses and other power supply equipment or overhead lines.
Straight-through connector: installed in the middle of the running cable, used to connect 2 sections of cable lines.
Technical Parameters:
Comply with and pass GB/T12706.4-2020 rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) extruded insulated power cables and accessories Part 4: rated voltage 6kV (Um=7.2kV) to 35kV ( Um=40.5kV) power cable accessories test requirements and IEC60502-4:2005 rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) extruded insulated power cables and accessories Part 4: rated voltage 6kV (Um= 7.2kV) to 30kV (Um=36kV) test requirements for power cable accessories.
serial number | project | Standard parameter values |
1 | Power frequency withstand voltage test | 39kV, no breakdown or flashover in 5 minutes |
2 | DC withstand voltage test | 35kV, no breakdown or flashover in 15 minutes |
3 | Partial discharge test | Discharge ≤10pC at 15kV |
4 | Impulse voltage test | 95kV, positive and negative polarity 10 times each |
5 | Constant pressure load cycle (in air) | 22kV, heated to 95-100℃, stable for 2 hours, cycled 30 times |
6 | Constant pressure load cycle (water) | 22kV, heated to 95-100℃, stable for 2 hours, cycled 30 times |
7 | Short circuit thermal stability (cable cross-section 400mm2) | 40.9kA, 3s, 2 times |
8 | Short circuit dynamic stability (cable cross-section 400mm2) | 177.0kA, 10ms, 1 time |
9 | Power frequency withstand voltage test | 22kV, no breakdown or flashover in 15 minutes |
10 | Outdoor terminal salt spray test | 11kV,1000h |
11 | Indoor terminal moisture test | 11kV,300h |
12 | Intermediate joint water immersion test | 2.5u0, heated to 95-100℃, stable for 2 hours, immersed in water 30 times |