Power Cables


Power cables are made of copper / aluminium conductor, PVC / XLPE insulated having voltage rating upto 1100 V AC / 1500 V DC armoured / unarmoured with PVC outer jacket made as per IS 1554 Part-1, IS 7098 Part I, BS 5467, IEC 502, any other international standard or customer specification.

Size : 1.5 Sq.mm. to 630 Sq.mm. in 2 to 4 core.
1000 Sq.mm in single core

Conductor - Annealed Bare Electrolytic Grade Copper / Aluminium Conductor conforming to IS:8130:1984. Shaping of Conductor is applied above 10.0 Sq.mm. in Aluminium & 6.0 Sq.mm. in Copper.

Insulation - Type A PVC Compound capable of withstanding conductor temperature upto 70 degrees C for general purpose insulation & 85 degrees C for Heat Resistant insulation conforming to IS:5831:1984 or XLPE insulation for conductor temperature upto 90 degrees C.

Colour Of Cores : Cores are identified with a colour scheme as per IS:1554(Pt-I):1988 as under :

In case of cable exceeding five cores, two adjacent (counting and direction cores) in each layer shall be coloured Blue, Yellow and remaining cores grey or cores can be identified by numbers by numbers printed on that of same colour.
Laying Of Cores - Cores are laid up as per the above colour scheme. The final lay direction shall be kept right hand.
Inner Sheath - The Inner Sheath is applied over laid up of cores by extrusion / wrapping of thermoplastic material.
Armoring - It is applied over inner Sheath. It may consist of galvanized Round Steel wires or galvanized Flat Steel Strips conforming to IS:3975. Round Wire armouring is provided , where the calculated diameter under armour is 13.0 mm. Above this, armouring is either round wire/steel strip. In single core cables used in AC systems, armoring I done by non-magnetic hard drawn aluminum wires / strips
Outer Sheath - A final covering of PVC Compound, conforming to IS:5831:1984, is applied over Armouring in case of Armoured Cable or over Inner Sheath in case of Unarmoured Cable, called as "Outer Sheath".

The insulation, inner sheath & outer sheath can be of HR PVC, FRLS PVC, FRHF (Flame Retardant Halogen Free) or ROHS Compound depending upon the application.

LT PVC CABLES

DIMENSIONS & WEIGHTS OF ORIENT CAB PVC INSULATED POWER CABLES CONFIRMING TO IS:1554 / Par t 1 / 1988 1.1 KV

Single Core PVC insulated & sheathed unarmoured & armoured cable with Aluminium Conductor conforming to IS:1554 / Part 1 / 1988


Two Core PVC insulated & sheathed unarmoured & armoured cable with Aluminium Conductor conforming to IS:1554 / Part 1 / 1988

Three Core PVC insulated & sheathed unarmoured & armoured cable with Aluminium Conductor conforming to IS:1554 / Part 1 / 1988

Three and Half Core PVC insulated & sheathed unarmoured & armoured cable with Aluminium Conductor conforming to IS:1554 / Part 1 / 1988

Four Core PVC insulated & sheathed unarmoured & armoured cable with Aluminium Conductor conforming to IS:1554 / Part 1 / 1988

LT-XLPE CABLES

CROSS LINKED POLYETHYLENE (XLPE)
XLPE means cross-linked polyethylene or vulcanize polyethylene. The basic material is low density polyethylene. Polyethylene is a thermoplastic material consisting of long chain of hydrocarbon molecules. At elevated temperatures these molecules tend to move relative to one another so that the material becomes increasingly deformable and will eventually melt at the temperature around 110°C. By means of process similar to the vulcanization or rubber the polyethylene molecules can be cross-linked. The process of cross linking or vulcanization consists or producing chemical bonds at interval between the long molecular chain to give a “ladder” effect which prevents slippage between molecules. As a result of cross-linking the material becomes heat resistant and does not soften at higher temperatures. Further it has better resistance to stress cracking and good resistance to ageing in hot air. With the change of structure there is no adverse effect on electrical properties.

LT-XLPE CABLES ARE SUPERIOR OVER PVC CABLE SINCE THEY

COMPARISON OF MAIN PROPERTIES BETWEEN PVC AND XLPE INSULATION
Characteristics Unit PVC XLPE
Termitivity (50Hz,20°C) - 4-6 2.- 3
Dielectric Loss Factor (50Hz,20°C) - 0.05-0.07 0.0004
Volume Resistivity (27°C) ohms cm (min.) 1013 1014
Max. Conductor Temp. °C 70 90
Max. Short Circuit Temp. °C 160 250
Tensile Stength N/mm (min.) 12.5 12.5
Elongation at break - Excellent Medium
Flexibility at - 10°C - Poor Good
Resistance to abrasion - Medium Good

LT XLPE CABLES

DIMENSIONS & WEIGHTS ORIENT CAB XLPE INSULATED POWER CABLES CONFIRMING TO IS:7098 (PART-1) 1988 1.1 KV

Single core XLPE insulated unarmoured & armoured cable with aluminium conductor conforming to IS:7098 (Part 1) 1988


Two core XLPE insulated unarmoured and armoured cable with aluminium conductor conforming to IS:7098 (Part 1) 1988

Three core XLPE insulated unarmoured and armoured cable with aluminium conductor conforming to IS:7098 (Part 1) 1988

Three & A Half Core XLPE Insulated Unarmoured and Armoured cable with Aluminium Conductor Conforming to IS:7098 (Part 1) 1988

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