Medium Voltage Heat Shrink Joints-Conventional and next generation. Raychem developed highly specialized polymers for heat shrink joints suitable for plastic and paper cables upto 36 kV. For transition joints, a special oil barrier tubing is used to transform draining oil (MI) and non-draining oil (MIND) paper insulated cable into quasi-polymeric insulated cable with a radial field.
The conventional design developed in 1980 was based on multiple layer tubing concept providing insulation and stress functions. The latest developed heat shrink joint is a single tubing (triple layer co-extruded) of adequate thickness which provides insulation for a particular voltage range.
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Parameter
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Unlimited shelf life for heat shrink components
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Suitable for wide range of connectors
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Immediate energization
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Pre-Engineered Kit
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Tested as per National & International Standards
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Particulars
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7.2 KV
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12 KV
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24 KV
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36 KV
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Applicable Standards
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IEC 60502-4, CENELEC HD 629.1, IS 13573-2
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Rated Voltage of cable accessories
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3.8/6.6 (7.2)
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6.35/11 (12)
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12.7/22 (24)
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19/33 (36)
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Brand
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Raychem-RPG
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Raychem-RPG
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Raychem-RPG
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Raychem-RPG
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Accessories
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Heat Shrink type
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AC Voltage test(Dry for 5 minutes )
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17.1 kV
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28.5 kV
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57.1 kV
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85.5 kV
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AC Voltage test (Wet for 1 minute)
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15.2 kV
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25.4 kV
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50.8 kV
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76 kV
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DC Voltage test for 15 min
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15.2 kV
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25.4 kV
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50.8 kV
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76 kV
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Partial Discharge at 1.73U0
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Less than 10 pC
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Impulse Voltage at ambient & elevated temp
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60 kVp
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75 kVp
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125 kVp
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170 kVp
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60 cycles in air & water
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5 hours
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95 - 100° C
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3 hours
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Resistive based
(ZnO based available in termination on req.)
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Heat Shrinkable type
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As per ASTM D-2303
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10 kV/mm minimum
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