3M™ Cold Shrink Medium Voltage termination kit QT II series, thanks to the cold shrink silicon insulation body provides an easy and secure solution for MV cable termination.
3M™ Cold Shrink Medium Voltage accessories series QT II are designed using a unique Cold Shrink delivery system. Products are supplied prestretched on a removable core for efficiency and easy of installation. Electrical field control device preinstalled in the insulation body help to avoid complexity during the installation. The specific properties of the insulating silicon body allow to terminate wide range of cable cross sections. 3M™ MV termination kits are available both with and without mechanical lugs included. 3M™ Cold Shrink Medium Voltage accessories are designed to provide an easy and secure solution to terminate MV cables.
3M™ Cold Shrink QT-II and QT-III Terminations function in a similar manner. They both employ 3M cold shrink technology which utilizes a high-dielectric constant (Hi-K) stress control tube. The Cold Shrink QT-II employs a dielectric grade silicone grease in conjunction with the stress control tube while the Cold Shrink QT-III employs a conformable Hi-K stress controlling compound. The termination is made from a pre-stretched Hi-K stress control tube and a silicone rubber termination insulator body installed around a core. When the core is removed, the rubber provides a constant inward pressure on the cable, forming a seal which expands and contracts with variations in temperature and load, thereby creating a ‘living seal.’
The silicone rubber material used to make the Cold Shrink QT-III termination has better track-resistant properties than the Cold Shrink QT-II, while allowing for a much shorter design without sacrificing product performance. This is especially important when space is in an issue as in cabinet placements. In addition, there are fewer steps involved when using a Cold Shrink QT-III termination so installation is simpler and generally quicker than the QT-ll termination.
No, unless the following conditions are met:
They are qualified as IEEE-48 Class 1 for indoor and weather-protected applications. For outdoor applications use one-piece, skirted silicone rubber terminations which meet IEEE-48 Class 1 for outdoor weather-exposed applications. Indoor terminations, such as the 3M™ Cold Shrink QT-III Silicone Rubber Indoor Tubular Termination Kits, 7640-T and 7650-T Series, can be specified for most outdoor, pad-mounted switchgear and transformer applications, since these enclosure interiors are protected from direct exposure to the elements.
All 3M™ Cold Shrink skirted terminations meet the IEEE-48 Class 1 for outdoor weather-exposed applications. All 3M Non-skirted Terminations are qualified as IEEE-48 Class 1 for indoor and weather-protected applications, except for two terminations, which are classified as Class 3. These IEEE-48 Class 3 terminations are: 3M™ Cold Shrink QT-II Silicone Rubber Termination Kit 5671 and 3M™ Cold Shrink QT-II Silicone Rubber Termination Kit 5672 for Concentric Neutral (CN) and Jacketed Concentric Neutral (JCN) cables.
Yes, we have the 3M™ Cold Shrink QT-III Termination Kit 7673-S-8 Series for 69/72.5 kV (8-skirted). We also have the 3M™ Cold Shrink QT-III Termination Kit 7673-S-10 series which has an additional 2 skirts if your installation is in a heavily polluted area or additional creepage distance is desired.
NOTE: The 7673 Series does not come with lugs, but we have a series of shear bolt options to be included with the kit.
For custom kitting, customers can take advantage of our complimentary 3M Construction Services.
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3M™ Cold Shrink QT-III Termination Kit 7673 Series
Yes, all terminations above 69kV will be custom kitted. In order to determine proper kit components an application engineer from 3M will have to be contacted. You will need a detailed cable data sheet so we can make sure that all of our accessories will fit your application.
For custom kitting, customers can take advantage of our complimentary 3M Construction Services.
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