Heat Shrinkable Straight through Joint suitable for 1 core copper/aluminium, tape/wire shield and lead sheathed cables upto 72.5 kV. The design has been focused to provide the basic important functions required for high voltage power cable accessories including the electric performance, stress relief measure, environmental seal, mechanical fatigues and other related performance parameters laid down in different countries for various service conditions.
- Simple installation, No special tools required.
- Excellent performance and reliability.
- Outstanding dielectric properties.
- No shelf life limitations upto or below 50oC.
- Permanent radial pressure equally distributed on cable profiles.
- Resistance to acids, alkalis, ozone, UV light & fungus.
- Immediate energizable.
- Field proven technology.
Specifications and Standards
Performance test results & GTP for Heat Shrinkable Joints of 72.5 kV rating (In conformance to IEEE-48)
|Test Requirement ||Test Voltage / Parameters ||Results |
|A.C. Voltage Withstand Test (Dry) ||114 kV for 4 hrs ||No Breakdown, No Flashover |
|A.C. Voltage Withstand Test (Dry) ||175 kV for 1 Minute ||No Breakdown, No Flashover |
|A.C. Voltage Withstand Test (Dry) ||145 kV for 1 Minute ||No Breakdown, No Flashover |
|Impulse Voltage withstand Test ||10 Impulses of each polarity at 325 kV ||No Breakdown, No Flashover |
|D.C Voltage Withstand Test ||15 minutes for 245 kV ||No Breakdown, No Flashover |
|Heating Cycle Test ||20 cycles at 1000 C at 2 U0 ||No Breakdown, No Flashover |
|Partial Discharge Test ||< 5 Pc at 57 kV ||Passes |
|Humidity Test ||300 hours at 1.25 U0 || Passes |
|Salt Fog Test ||1000 hours at 1.25 U0 ||Passes |