TRATOS® XLPE/HDPE
Cathodic Protection Cable

Tratos single core XLPE/HDPE unarmoured cable is designed for use as the connecting cable in cathodic protection systems requiring improved water resistance. 

Because of its many benefits Cross-linked polythene (XLPE) is now used almost universally as the insulation on LV cables. Polyethylene, which is thermoplastic, is transformed into an elastomeric material (XLPE) by cross-linking which Tratos accomplished by chemical methods. Tratos cross-linked polythene has good mechanical properties and good resistance to abrasion coupled with excellent dielectric properties. Because of its elastomeric nature it withstands high temperatures without melting or excessively deforming. XLPE has higher modulus and strength at elevated temperatures compared to HDPE it also has reduced creep and sensitivity to stress cracking. 

Over the XLPE Insulation Tratos extrude a close-fitting sheath of High Density Polyethylene (HDPE). The higher the density of the material the greater the crystallinity and therefore the greater the hardness and stiffness. Primarily HDPE is used as a sheath because of its toughness and excellent water resistance, though it also has good resistance to chemicals, and some solvents. However, it has only moderate resistance to oils and although classed as halogen free has the disadvantage of being flammable. Low temperature performance is very good. Unlike PVC sheathed cables which should not be installed or flexed when the temperature is below 0oC polyethylene sheathed cables can be safely installed at sub-zero temperatures.

Tratos XLPE/HDPE cables offer performance and reliability over an extended lifetime in cathodic protection applications moisture or water are present continually, or for long periods of time.  HDPE coverings also provide corrosion protection in installations where this is a problem.