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3M™

Cold Shrink QT-III Silicone

Rubber Skirted Termination Kits,

7620-S, 7680-S and 7690-S Series

5, 8, 15, 25/28 and 35 kV

Product Description

3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and

7690-S Series, contain one-piece, skirted, silicone Rubber Skirted Terminations,

qualified as IEEE Standard 48 Class 1 for outdoor weather-exposed applications. The

termination assemblies consist of a skirted insulator, high-dielectric constant (High-K)

stress control tube*, conformable High-K stress controlling compound and built-in

environmental top sealing compound. The insulator is made of a dark gray silicone

rubber with excellent tracking resistance and hydrophobic properties.

*7620-S is 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 35 kV, with tape shield, wire shield and

UniShield

constructions.

Kit Contents

 3 - High-K, Tracking Resistant, Silicone Rubber Skirted Terminations

 3 - Constant Force Springs

 3 - Pre-formed Ground Braids

 6 - Strips Scotch

Mastic Strip 2230

 1 or 3 - 3M™ EMI Copper Foil Shielding Tape 1181 Strips, 1/2” x 10”

 1 - 3M™

Cable Preparation Kit CC-2

 1 - Instruction Sheet

Features

 Conforms to the IEEE Standard 48 Class 1 requirements for 5, 8, 15, 25/28 and

35 kV terminations

 One-piece versatile design, allowing quick installation and accommodating a wide

range of cable sizes

 Cold Shrink delivery system for easy installation: Simply place termination over

prepared cable and unwind core to shrink into place (no force fit required)

 High-K stress control: Specially formulated high dielectric constant material

minimizes surface stress by more uniformly distributing the electrical field over

the entire surface of the insulator

 Compact design provides for easier installation in restricted spaces

 Silicone rubber insulators, EPDM stress control tubes, stress controlling

compound and environmental sealing compound are compatible with all common

solid dielectric insulations, such as polyethylene (PE), cross-linked polyethylene

(XLPE) and ethylene propylene rubber (EPR)

Data Sheet June 2013

Summary of content (14 pages)

PAGE 1
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series 5, 8, 15, 25/28 and 35 kV Data Sheet Product Description June 2013 3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series, contain one-piece, skirted, silicone Rubber Skirted Terminations, qualified as IEEE Standard 48 Class 1 for outdoor weather-exposed applications.
PAGE 2
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Applications 3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series is designed for:  5, 8, 15, 25/28 and 35 kV classes  Tape shielded, Wire shielded and UniShield® cables  Solid dielectric insulations, such as polyethylene, XLPE and EPR  Protected and weather-exposed contaminated locations  Free-hanging or bracket-mounting arrangements  These terminations can b
PAGE 3
M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Pollution Severity Level Guide Light Heavy  Areas without industry and with low-density housing  Areas subjected to frequent winds and/or rainfall with low-density industry and housing  Agricultural areas *  Mountainous areas All of these regions should be situated at least 7 miles from the coast and should not be exposed to coastal winds.
PAGE 4
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Environmental Performance Material Characteristics Hydrophobicity When airborne contaminants are deposited on a termination surface, destructive leakage currents can initiate when the surface becomes wet.
PAGE 5
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Typical Properties Not for specifications. Values are typical, not to be considered minimum or maximum. Properties measured at room temperature 73°F (23°C) unless otherwise noted. 3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series can be used on cables with a rated maximum operating temperature of 221°F (105°C) and an overload rating of 284°F (140°C).
PAGE 6
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series [A] Kit Number 7685-S-12 7686-S-12 Dimension [A] (Max.) 28.75” (730 mm) 29.75” (756 mm) Wet Creepage Distance (Max.) 45.5” (1156 mm) 46.5” (1181 mm) Arcing Distance (Max.) 28.75” (730 mm) 29.
PAGE 7
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Typical Properties (continued) Silicone Rubber Insulator Physical Properties (Test Method) Dark Gray Color Tensile Strength (ASTM D412) Modulus @ 100% Elongation Modulus @ 300% Elongation Hydrophobic Recovery (3M Test Method No. 406) >90° Contact Angle Electrical Properties (Test Method) Dielectric Constant (S.I.C.
PAGE 8
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Common Conductor Size Chart Cross Sectional Area Size 10 AWG 9 AWG 8 AWG 7 AWG 6 AWG 5 AWG 4 AWG 3 AWG 2 AWG 1 AWG 8 of 14 CMA 10,380 11,844 13,090 15,792 16,510 19,740 20,820 26,240 27,627 31,580 33,090 41,740 43,413 49,430 52,620 59,200 66,360 69,070 74,987 83,690 mm2 6 8 10 14 15 22 25 30 35 38
PAGE 9
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Termination Selection Table Kit Number 7620-S-2 7621-S-2 7622-S-2 Cable Insulation O.D. Range 0.32 - 0.59” (8,1 - 15,0 mm) 0.44 - 0.89” (12,1 - 22,6 mm) 0.64 - 1.
PAGE 10
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Product Specifications The 3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S,7680-S and 7690-S Series cable terminations must have a voltage class rating equal to or greater than the cable being terminated. The rating shall be 5, 8, 15, 25/28 or 35 kV as an IEEE Standard 48 Class 1 termination.
PAGE 11
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Performance Tests (continued) Typical Results, IEEE Standard 48 Long-Term Test Sequence 5 / 8 kV (2 Skirt) Insulation Class Test Requirements Results 35 kV (8 and 12 Skirt) RequireResults Results ments 15/25 kV (4 Skirt) Requirements Partial Discharge Extinction voltage @ 3 pC 7.5 kV Passed 13 / 21.5 kV Passed 30 kV Passed Cycling Aging 30 days, 130°C cond.
PAGE 12
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Installation Techniques Caution Working around energized electrical systems may cause serious injury or death. Installation should be performed by personnel familiar with good safety practice in handling high-voltage electrical equipment. De-energize and ground all electrical systems before installing product.
PAGE 13
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series Maintenance It is good practice to incorporate a general inspection/cleaning of 3M™ Cold Shrink QTIII Silicone Rubber Skirted Termination Kits during normal scheduled or maintenance inspections. Once the area has been de-energized, the terminations can be inspected, and if need be, cleaned.
PAGE 14
3M™ Cold Shrink QT-III Silicone Rubber Skirted Termination Kits, 7620-S, 7680-S and 7690-S Series IMPORTANT NOTICE All statements, technical information, and recommendations related to 3M’s products are based on information believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated with such use.