|Heat Shrink/Cold Shrink:||COLD SHRINK|
3M Cold Shrink Silicone Rubber Termination Kit QT-III, 7620-S, 7680-S and 7690-S Series contain one-piece, skirted, silicone rubber terminations, qualified as IEEE Standard 48-1996 Class 1 for outdoor weather-exposed applications. The termination assem blies consist of a skirted insulator, high-dielectric constant (Hi-K) stress control tube*, conformable Hi-K stress controlling compound and built-in silicone top seal. The insulator is made of a dark gray silicone rubber with excellent tracking resist ance and hydrophobic properties.
*7620-S and 7621-S designed and assembled with stress controlling compound only.
The complete assembly is pre-stretched and loaded onto a removable core. The disposable core can be recycled. The kits are designed for terminating solid dielectric shielded power cables rated 5 through 34.5 kV, with tape shield, wire shield and UniShield constructions.
3M Cold Shrink Silicone Rubber Termination Kit QT-III, 7620-S, 7680-S and 7690-S Series are used to terminate tape shield, wire shield and UniShield power cable rated 5 - 34.5 kV, having extruded solid dielectric insulation as follows:
Polyethylene (high and low density), cross-linked polyethylene (XLP) and ethylene propylene rubber 9EPR)
The terminations are light weight for either free-hanging or bracket mounting arrangements.
They can be used in both protected and weather-exposed contaminated areas
The amount of airborne contamination determines the operating environment. Operating environments are described as areas having varying degrees of airborne contaminant or pollution severity that may, or may not affect the long-term performance of terminations. These operating environments are defined as light, medium, heavy and extremely heavy variations of pollution severity. The appropriate termination selection depends on the system voltage and operating environment.
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