3M 7622-T-110, 7624-T-110, 7626-T-110, 7625-T-110, 7623-T-110 User Manual
3M™ Cold Shrink QT-III Silicone Rubber Indoor
Tubular Termination Kit
With High-K Stress Relief
®
For Tape Shield, Wire Shield and UniShield
7622-T-110, 7623-T-110, 7624-T-110, 7625-T-110,
7626-T-110
Instructions
IEEE Std. No. 48
Class 1 Termination
15 kV Class
110 kV BIL
Cable
F CAUTION
Working around energized systems may cause serious injury or death. Installation should
be performed by personnel familiar with good safety practice in handling electrical
equipment. De-energize and ground all electrical systems before installing product.
September 2014
78-8113-5099-6 Rev E 3
1.0 Kit Contents
3 High–K, Tracking Resistant, Silicone Rubber Terminations
3 Pre-formed Ground Braids
3 Constant Force Springs
3 3M™ EMI Copper Foil Shielding Tape 1181 Strips, 1/2" x 10"
6 Strips Scotch® Mastic Strip 2230 (black with white release liners, bagged)
1 3M™ Cable Cleaning Preparation Kit CC-2
1 Instruction Sheet
Note: Do not use knives to open plastic bags.
Kit Selection Table
NOTE: Final Determination Factor is cable insulation diameter.
Kit Number
7622–T–110
7623–T–110
7624–T–110
7625–T–110
7626–T–110
Primary Insulation
O.D. Range Jacket O.D, Range
0.64" – 1.08"
(16,3 – 27,4 mm)
0.72" – 1.29"
(18,3 – 32,8 mm)
0.83" – 1.53"
(21,1 – 38,9 mm)
1.05" – 1.80"
(26,7 – 45,7 mm)
1.53" – 2.32"
(38,9 – 58,9 mm)
0.97" – 1.48"
(24,6 – 37,7 mm)
1.04" – 1.60"
(26,4 – 40,6 mm)
1.12" – 1.87"
(28,4 – 47,5 mm)
1.39" – 2.40"
(35,2 – 61,0 mm)
1.84" – 2.80"
(46,7 – 71,1 mm)
Table 1
Conductor Size Range (AWG & kcmil)
5 kV 8 kV 15 kV
4/0 – 400
—
300 – 500
—
500 – 750
—
700 – 1500
—
1750 – 2000
—
3/0 – 300
—
250 – 500
—
350 – 700
—
600 – 1250
—
1500 – 2000
—
(70 – 150 mm
(120 – 240 mm
(240 – 500 mm
(625 – 1000 mm
2 – 2/0
(35 – 70 mm
2/0 – 300
4/0 – 500
500 – 1000
1250 – 2000
2
)
2
)
2
)
2
)
2
)
2 78-8113-5099-6 Rev E
2.0 Instructions for Tape Shielded Cable
Prepare Cable
2.1 Check to be sure cable size fits within kit range as shown in Table 1.
2.2 Prepare cable using dimensions shown in Figure 1. BE SURE TO ALLOW FOR DEPTH OF TERMINAL LUG.
If necessary to prevent tape shield from unrolling, hold down edge with a single wrap of 3M™ EMI Copper Foil
Shielding Tape 1181.
NOTE: Provide additional exposed conductor distance to account for growth during crimping of ALUMINUM lugs or
connectors as follows:
Aluminum Lug
and Connector
Growth Allowance
2 - 350
1/4” (6 mm)
400 - 650
1/2” (13 mm)
750–1000
3/4” (19 mm)
1250 - 2000
Field determined
NOTE: It is imperative to remove all remnants of the semi-con layer, even if the semi-con layer comes off as one layer.
There should not be any remaining black areas, or particles, on the cable insulation layer.
Jacket Removal Length
Depth Of Terminal Lug + Growth Allowance
9" (229 mm)
3" (76 mm)
1-1/2" (38 mm)
Semi-Con
Tape Shield
Cable Jacket
Figure 1
3.0 Install Ground Braid
3.1 Select a Scotch® Mastic Strip 2230 from kit and remove white release liners. Using light tension, apply a SINGLE
WRAP of mastic around the cable jacket 1/4" (6 mm) from cut edge (Figure 2). Cut off excess.
1/4" (6 mm)
Semi-Con
Tape Shield
1st Scotch® Mastic Strip 2230
Cable Jacket
Figure 2
78-8113-5099-6 Rev E 3
3.2 Position pre-formed ground braid with short tail over tape shield directly adjacent to cable jacket cut edge. PLEASE
NOTE: The ground braid needs to make full contact with the metallic tape shield. Position long tail of ground braid,
extending over cable jacket with solder block over mastic strip (Figure 3). Secure ground braid to cable jacket 4-1/2"
(114 mm) from cable semi-con edge using vinyl tape (Figure 3).
NOTE: Position vinyl tape with care, it also serves as a marker for positioning the termination.
4-1/2" (114 mm)
Semi-Con Edge
Tape Shield
Ground Braid
Cable Jacket Edge
Solder Block
1st Scotch® Mastic Strip 2230
Vinyl Tape Marker
Figure 3
3.3 Wrap ground braid around cable tape shield one complete wrap, trim excess to prevent overlap and secure in place
with constant force spring. Wrap spring in same direction as ground braid (Figure 4). Cinch (tighten) the spring after
wrapping the final winding.
3.4 Select second Scotch® Mastic Strip 2230 from kit and remove white release liners. Apply a second SINGLE WRAP
of mastic over solder block on ground braid and previously applied mastic (Figure 4). Cut off excess.
Constant Force Spring
Tape Shield
Ground Braid
1st Scotch® Mastic Strip 2230
Solder Block
®
2nd Scotch
Mastic Strip 2230
Trim
Cable
Tape
Shield
Ground Braid Leg
Figure 4
4 78-8113-5099-6 Rev E
3.5 Wrap two highly stretched half-lapped layers of electrical grade vinyl tape around Scotch® Mastic Strip 2230,
constant force spring and exposed tape shield (Figure 5).
NOTE: Take care not to cover exposed semi-con insulation shield. A minimum of 1" (25 mm) must be exposed.
SPECIAL NOTE FOR CLOTH OR PAPER SEMI-CON INSULATION SHIELD
In cables with cloth or paper semi-conductive shields, it is recommended the shield be over wrapped with one halflapped layer of highly stretched semi-conductive rubber tape, such as Scotch® Electrical Semi-Conducting Tape 13.
Semi-Con
Tape Shield
Constant Force Spring
Two Half-Lapped Layers of Electrical Grade Vinyl Tape
Scotch® Mastic Strip 2230
Vinyl Tape Marker
Figure 5
4.0 Install Lug or Connector
Important Packaging Notice
In order to make sure that you receive an undamaged termination, this 3M™ Cold Shrink QT-III Termination is packed
with a RED SHIPPING CORE inside of the white core. Please remove the red shipping core BEFORE you install the
termination. This shipping core can be recycled with other polypropylene waste.
4.1 Check to insure 3M™ Cold Shrink QT-lll Silicone Rubber Termination assembly fits over the selected lug or
connector. If lug or connector. (Figure 6) will not fit through the termination core, clean the insulation (per Step 5.0)
and slide termination on cable before installing lug or connector. DO NOT REMOVE CORE AT THIS TIME.
Clearance
Connector/Lug
Figure 6
NOTE: Refer to pages 17 – 19 for 3M Connector and Lug crimping information.
NOTE: For Aluminum Conductors - Thoroughly wire brush conductor strands to remove aluminum oxide layer. Insert
conductor into lug or connector and then remove conductor. This will transfer some of the antioxidant compound onto
the conductor. Wire brush the anti-oxidant paste into the strands. Immediately insert conductor into lug or connector
barrel as far as it will go.
NOTE: Die/crimper head rotation between consecutive crimps is RECOMMENDED.
4.2 Position connector or lug and crimp according to manufacturer's directions. Remove excess oxide inhibitor and sharp
crimp flashings following crimping.
5.0 Clean Cable Insulation and Lug or Connector Barrel Using Standard Practice
5.1 Wipe the cable insulation with one of the solvent saturated pads from the 3M™ Cable Cleaning Preparation Kit CC-2.
DO NOT ALLOW SOLVENT TO TOUCH SEMI-CON INSULATION SHIELD!
5.2 If abrasive must be used:
a. Use on insulation only. DO NOT USE ABRASIVE ON SEMI-CON INSULATION SHIELD!
b. Use only aluminum oxide abrasive; grit 120 or finer, included in 3M Cable Cleaning Preparation Kit CC-2.
c. Be careful not to reduce the cable insulation diameter below that allowed by the kit.
78-8113-5099-6 Rev E 5
6.0 Install Termination
6.1 Slide the termination body onto the cable and remove core. Make sure the termination body (not the core) is butted
up to the edge of the vinyl tape marker previously applied (Figure 7). Pull the core while unwinding, counterclockwise, starting with the loose end (Figure 7). Be sure to alternate the pulling and unwinding actions (pullunwind-pull-unwind-etc.) to help prevent the core material from binding up as the core is being removed.
NOTE: Once the termination body makes contact over the mastic seal area, there is no need to continue supporting the
assembly. DO NOT PUSH OR PULL ON THE TERMINATION ASSEMBLY WHILE UNWINDING THE CORE.
Counterclockwise
Vinyl Tape Marker
NOTE: The material being removed at this step is mixed polymers
and can be recycled.
Figure 7
6.2 Connect ground braid to system ground according to standard practice.
Correct Installation of Termination on Tape Shielded Cable
Vinyl Tape
Marker
Ridge at End
of High-K Tube
Semi-Con Insulation Shield
Stress Controlling Compound
Ridge at End of Cable
Insulation Shield (Semi-Con)
Cable Insulation
Conductor
Environmental Top
Seal
High-K Stress
Relief Tube
6 78-8113-5099-6 Rev E
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