26/35 (27.5) Accessori per cavi termorestringenti kV

 

Scope of application:

Suitable for extruded insulated power cables with U0≤27.5kV

l Single-core, three-core cable

l Conduttore in rame o alluminio

l Extruded semi-conductive shielding layer or semi-conductive tape shielding

l Metal tape shielding or metal wire shielding

l corazzato o non corazzato

l Armatura in nastro metallico o armatura in filo metallico

utilizzo:

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.

Connettore diretto (insulated connector): in the middle of the installed and running cable, utilizzato per connettersi 2 tratti di linee in cavo.

Parametri tecnici:

Comply with and pass GB/T12706.4-2020 rated voltage 1kV (Uhm=1,2 kV) a 35kV (A=40,5kV) extruded insulated power cables and accessories Part 4: rated voltage 6kV (Um=7.2kV) a 35kV ( A=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.

numero di serie progetto Valori dei parametri standard
1 Prova di tensione di tenuta a frequenza industriale 124kV, nessun guasto o flashover 5 minuti
2 DC withstand voltage test 110kV, nessun guasto o flashover 15 minuti
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, riscaldato a 95-100 ℃, stabile per 2 ore, pedalato 3 volte
6 Prova di tensione di tenuta a frequenza industriale 110kV, no breakdown or flashover in 4h