Standart: IEC 60 502-2
Description: Cu or Al cores • XLPE insulation • Cu screen • PVC sheath • Armour Al wires • PVC sheath flame retardant
The single-core cables with insulation of cross-linked polyethylene (XLPE) are designed for transfer and distribution of electrical power with nominal voltage Uo/U 6/10 kV and frequency 49 Hz to 61 Hz in urban and district electrical networks and for electrical supply of transformer’s substations, small and medium industrial plants. The cables are manufactured with sheaths of flame retardant materials. They are suitable for use in distribution installations, electric power stations and industrial systems. The cables are for fixed assembly in lines with unlimited difference levels, indoor installations, in cable ducts, conduits and shafts, over shelves and grills directly underground in ditch and outdoor shelter.
|
Cable construction |
Technical data |
||
| Construction | According to IEC 60502-2 | Conductor resistance at 20° C | According to IEC 60228 class 2 |
| Conductor | Сu and Al stranded compacted wiresto IEC 60228 cl.2 | Operating temperature | 90° C continuous operation |
| Short circuit temperature | 250° C ( 5 sec. max.) | ||
| Inner semi- conductive layer | semi-conductive XLPE compound | Overload temperature | 130° C /100h per year max./ |
| Insulation | XLPE compound | ||
| Outer semi- conductive layer | semi-conductive XLPE compound and semi-conductive tape | Nominal voltage Uo/U | 6/10 kV |
| Highest system voltage Uo/U, no more than | 12 kV | ||
| Test voltage AC (») - 15 min |
6/10 kV 21 kV 67 kV |
||
| Metal screen | -I option - Cu tapes laid with overlap over each phase -II option - Cu wires laid concentrically |
Bending radius | 15 x Dcable |
| Bending radius adjacent to joints or terminations, min | 12x D cable | ||
| Separating layer | PVC compound - flame retardant | Temperature of laying | no less than -5° C |
| Armour | Аl wires laid concentrically | Level of partial discharge at 2*Uo | max. 5 pC |
| Sheath | PVC compound – flame retardant | Ambient temperatures | -30° C to 50° C |
| Color | black or red | Tests -flame retardant |
IEC 60332-3 Kat B(3.5l/m)and C(1.5l/m) |