These single core cables are designed for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations. If the cable gets water inside due to the mechanical demages, swellable tapes prevent the movement of the water inside the cable.

Standard :IEC 60840

CONSTRUCTION

40/69kV XLPE Insulated, PE Sheathed High Voltage Power Cables

Conductor: Copper/Aluminium wire, stranded to BS 6360 class 2.

Conductor Screen: The conductor screen consists of an extruded layer of non metallic, semi-conducting compound applied on top of a semi-conducting tape. The conductor screen is applied under triple extrusion process over the conductor along with the insulation and the insulation screen. The extruded semi-conducting compound is firmly bonded to the insulation to exclude all air voids and can be easily hand stripped on site.

Insulation: Extruded cross-linked polyethylene (XLPE-GP8) compound insulation

Insulaton Screen: The insulation screen consists of an extruded layer of non metallic, semi-conducting compound extruded over the insulation of each core. The extruded semi- conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating.

Semi-conductive Water Blocking Swellable Tape: A semi-conducting tape shall beapplied over the core assembly as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. The screen may be covered by semi-conductive water blocking swellable tape to ensure longitudinal watertightness.

Metallic Layer: The metallic layer may be applied over the core assembly collectively.

The metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires.

Swellable Tape:Swellable material

Separation Sheath: Aluminum Tape sheath

Outer Sheath: Thermoplastic HDPE-ST3 compound

Dimensional Data

Nom. Cross-Section Area	Nom. Insulation Thickness	Copper Wire Screen Area	Approx. Overall Diameter	Approx. Weight
				CU	AL
mm²	mm	mm²	mm	kg/m
240	13.0	25	56.9	4.7	2.9
300	13.0	25	59.9	5.4	3.3
400	13.0	35	61.5	6.4	4.0
500	13.0	35	65.0	8.4	4.9

Electrical Data

Nom. Cross- Section Area	D C Resistance @20°C		A C Resistance @90°C		Capacitance per core	Inductance	Continuous Current Rating for Single Circuit (in air)
							Cu conductor		Al conductor
	Cu	Al	Cu	Al			Trefoil	Flat	Trefoil	Flat
mm²	Ω/km	Ω/km	Ω/km	Ω/km	µF/km	mH/km	A		A
240	0.0754	0.125	0.0973	0.161	0.174	0.414	576	715	449	557
300	0.0601	0.100	0.0781	0.129	0.189	0.397	658	820	515	642
400	0.0470	0.0778	0.0618	0.101	0.207	0.381	762	955	601	752
500	0.0366	0.0605	0.0492	0.0776	0.190	0.372	877	1108	753	838