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Mechanical and Electrical Test Results of KALINGA XLPE Cables 1.1 KV Grade

XLPE that is Cross linked Polyethylene is the most superior extrudable solid dielectric currently in use i nthe wire and cable industry.

A Non Polar material ,XLPE possesses High insulation resistance and Dielectric Strenght and Low Diellectric Loss characteristics which are independent of both Frequency and temperature.

Test Unit Requirement Test Sample Insulated Cond. Finished Cable
Mech.Characteristics of insulation: Tensile Strength before ageing N/mm2 Min.12.5 15-18 15-18
Tensile strength after ageing change 7d 1350C % Max.±25 ±10 ±10
Elongation at break before ageing % Min.200 350-450 350-450
Change 7d 1350C % Max.±25 ±15 ±15
Thermal expansion characteristics 15 min 200 0C Under load 20 N/cm2 % Max.175 60-120,60-120
After no load % Max.15 0-8 0-8
Shrinkage of insulation jacket 1 h 1300C % Max.4 0-2 0-2
Electrical Test Voltage Tests 3.0 KV 5 min per conductor 1.2 KV dc for 240 hrs.in No breakdown Shall Withstand Withstood Withstood
water at 600C No breakdown Shall Withstand Withstood Withstood
Insulation resistance at Ambient Temperature ohm cm 3 X 1017,3 X 1017
At Operating Temperature ohm cm Shall Withstand Withstood Withstood