Scope of application:
Suitable for extruded insulated power cables with U0≤27.5kV
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 (insulated connector): in the middle of the installed and 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) test requirements for power cable accessories and GB/T28427-2012 Electrified Railway 27.5kV single-phase AC cross-linked polyethylene insulated cables and accessories 1.
serial number | project | Standard parameter values |
1 | Power frequency withstand voltage test | 124kV, no breakdown or flashover in 5 minutes |
2 | DC withstand voltage test | 110kV, no breakdown or flashover in 15 minutes |
3 | Partial discharge test | Discharge ≤5pC at 48kV |
4 | Impulse voltage test | 250kV, positive and negative polarity 10 times each |
5 | constant voltage load cycle | 65kV, heated to 95-100℃, stable for 2 hours, cycled 3 times |
6 | Power frequency withstand voltage test | 110kV, no breakdown or flashover in 4h |