XLPE Cables Applications and Advantages

 

·    Why is XLPE cables are Cross-Linked?

In XLPE insulation cables the rubber is vulcanized with addition of Small quantities of chemical additives. This will help to rearrange the molecular structure into a lattice this process will hinders the movement of molecules in the presence of heat.

XLPE cable is insulated with hydronic tubing made of cross-linked polyethylene plastic (XLPE).  The XLPE insulation has a three-dimensional bond within the plastic. The insulation is a  thermoset, zero halogen insulation that provides flame retardant properties.  It is strong, durable, and temperature conducting. 

This process of vulcanization is being carried out to increase the stability of the XLPE cables even at high temperatures. This process of Cross-linking polyethylene also improves current carrying capacity i.e. rating of XLPE in order to withstand higher short circuits and under normal load conditions.

By this XLPE insulation, the problem of increased aging as a result of electrical, environmental and mechanical stress is taken care of as well. After Cross linking these cables can be used in the open air or buried (for underground distribution) with no affect on current rating and heating of cables.

The cross-linking creates a molecular bond which improves a number of resistances such as:

• Heat deformation
• Abrasion
• Chemical
• Stress Crack Resistance

Various Applications of XLPE Cables:-

There is an endless list of usage of XLPE cable now days. Every industry uses these cables according to their needs. Few of applications of these cables are as below:-

Due to ability of withstand extreme temperatures and pressure these are used in mines. Even at these extreme temperature and pressure these still maintain its toughness that makes it a suitable material for mines.

Advantages of XLPE Insulated Cables:-

1.      XLPE insulated cables are perfect for High voltage transmission. This is due to its insulation properties. These cables are better than the other alternative options available in the market such as Silicon rubbers, and even Ethylene Propylene Rubber, EPR.

2.      These cables have better moisture resistant.

3.      These cables are better chemical resistant.

4.      These cables are better oil resistant.

5.      These cables possess better mechanical properties

6.      These cables have better impact resistance.

7.      These cables possess better elongation.

8.      These cables have better tensile strength.

9.      These cables saves time and cost during installation, maintenance and repair works.

10.  During transmission of high voltage from one point to another we observe sparking, shocking and heat that could cause fire or other potential hazards. In XLPE cables are better used for such purposes to avoid such type of instances.

11.  These cables requires less maintenance. XLPE cables doesn’t melt when there are high temperatures and thus XLPE cables can take excess load per unit are without fracture or tearing.

 

XLPE cable tubes have shape memory characteristics, which only require heat to return it to its original shape.

Cross-linking is a very intricate process. XLPE raw material powder is formed and processed into sturdy, durable end products, usually formed into cylindrical shapes that can be used for long tubing. 

If during the cross-linking process the degree is too high, the material could become brittle and cause stress cracking. If too low, the physical properties could be very poor and unusable. Made correctly, the tubing can act as a strong, long-lasting insulator to various wires and cables, protecting it from all sorts of external elements.

XLPE is designed to replace traditional galvanized steel, copper, and PVC piping due to rusting, cost and circulation. Cross-linking can solve plumbing issues at competitive pricing and can sometimes be easier to install. 

Some of important features of these cables are listed below:-

·         Hydrolysis resistance.

·         High electrical & insulation properties.

·         High extrusion speed.

·         Heat resistance.

·         Sunlight resistance.

·         Moisture resistance.