Polycab A2XWY 3.5 Core LT Aluminium Armoured Cable, Upto 400 sq mm

Product Details

The cables are suitable for use on AC single phase or three phase (earthed or unearthed) systems for rated voltage up to and including 1100 volts. These cables can be used on DC systems for rated voltage up to and including 1500 volts to earth.CONDUCTOR:The most acceptable metals for conductors are copper and aluminium due to their higher conductivity and ductility. As copper has got higher affinity for Sulphur, it corrodes in the atmosphere where Sulphur fumes are present. In these conditions tinned copper should be used. Aluminium oxide film which is always present on Aluminium conductor surface acts as barrier and it protects the Aluminium conductor from corrosion in fumes laden atmosphere.CONDUCTOR CONSTRUCTION: The most economical construction for conductor is solid conductor i.e. conductor is made of one single wire. As the area of conductor increase, solid conductor becomes more stiff and hence difficult to handle. In this case stranded construction is adopted. Here the conductor is made of number of strands. The strands are arranged in spiral layers in 1+6+12+18+…….. formations. This construction provides more flexibility. Where crimping of lugs are required, the conductor has to be of stranded construction only. To economise in insulating material, weight and overall diameter, shaped conductors are employed in bigger sized cables. Here the stranded conductor is shaped in to a segment of a circle so that when all the cores are laid, they form a complete circle. These segments are identified as 2 Core – 180 degree, 3 Core – 120 degree, 4 Core – 90 degree and 3.5 Core – 100/60 degree. I.S. 1554 permits solid conductor construction upto 10 sq.mm in Aluminium and upto 6 sq.mm in copper. It permits the use of shaped conductors for sizes from 16 sq.mm onwards.INSULATION: The PVC covering over conductor is called insulation and is provided by extrusion process only. The insulated conductor is called core.I.S. 1554 permits two types of PVC insulation as follows : 1) Insulation with TYPE A PVC compound as per I.S. 5831 which is suitable for 70 deg C continuous operation. 2) Insulation with TYPE C PVC compound as per I.S. 5831 which is suitable for 85 deg C continuous operation.COLOR CODE: The following colour code is used for identification : Single Core : Red, Black, Yellow or Blue. Two Cores : Red and Black Three Cores : Red, Yellow and Blue. Three & Half : Red, Yellow, Blue and Reduced neutral Black. Four Core : Red, Yellow, Blue and Black. Five Core : Red, Yellow, Blue, Black, & Grey Six Cores : Two adjacent cores. Blue and Yellow (Counting and direction core) And remaining Grey in each layer. OR By printing numbers on each core.LAYING UP: The cores are laid up with suitable lay. The final layer always has a right hand lay i.e. if you look along the cable, the cores move to your right hand.INNERSHEATH: Innersheath is provided over the laid up cores. It is provided to give circular shape to the cable and it provides bedding for the armouring. I.S. 1554 permits following two methods of applying the innersheath of any thermoplastic material i.e. PVC, Polyethylene, etc.EXTRUDED INNERSHEATH:Here the innersheath is provided by extrusion of Thermoplastic over the laid up cores. This type of the innersheath is generally provided in cables having round cores i.e in control cables and in power cables upto 10 sq.mm size. This type of the innersheath also acts as a water barrier between core.Also available in : Number of cores: 3, 3.5 CoreCable sizes: 300 400 185 240 120 95 sq mmNominal Voltage: 1100V 33KV 11KV