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Cold Shrink - Silicone RubberQTII(X)6S-32 Series Cable Termination

Instructions

Class I Outdoor TerminationVoltage Designation: 12/20(24) kV

Kit Contents:

1 Cold Shrink Silicone Rubber Breakout Boot Assembly 6 Tape Strip, Silicone

3 Silicone Rubber Phase Re-jacketing Sleeve Assembly 2 Mastic Seal Strip

3 Cold Shrink Silicone Rubber Termination Assembly 1 Roll Vinyl Tape

1 Roll Tinned Copper Ground Braid 1 Cable Preparation Kit

3 Constant-Force Spring (Small) 1 Installation Instructions

1 Constant-Force Spring (Large)

Size

Selection

(X)

Termination

Assembly

Body Size

Cable Insulation

O. D. Range

mm ( Inch )

( ) J 16 28 ( 0.64 1.12 )

( ) K 21 35 ( 0.84 1.38 )

( ) L 27 46 ( 1.08 1.80 )

( ) M 33 53 ( 1.31 2.10 )

Final Determining Factor = Cable Insulation Diameter

Table 1

3/C Copper Tape Shield Armored Cable

3M!

QTIISilicone Rubber Termination

78-8126-0458-1B

CAUTION:

Working around energized high voltage systems maycause serious injury or death. Installation should beperformed by personnel familiar with good safetypractice in handling high voltage electrical equipment.

De-energize and ground all electrical systems before

installing this product.

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! Temporary Vinyl Tape Band

Copper Tape Shield

[A]

Do not attach

cable mounting

bracket within

150 mm ( 6.0 )

of jacket edge.

[C]

Bedding

Armor

10 mm (0.40)

50 mm (2.0)

25 mm (1.0)

" Mastic Seal Strip

[B]

JacketRemoval

Length

[A] + [B]

Maximum

1.5 M

A. Prepare Cable

1. Determine cable jacket removal length required for correct phase spacing and bolted terminal lug connections ( [A] + [B]

Figure 1; based on the longest phase to be connected ). Allow for dimension [C] as needed.

NOTE: Individual phase length and separation dimensions vary according to specific installation and equipment

design requirements. They must, therefore, be determined by the installer and must conform to accepted engineering

practices. Supplied materials allow for a maximum [A] + [B] dimension of 1.5 M. See your local 3M Representative

for information regarding longer core length requirements.

2. Remove cable jacket, armor, bedding (inner sheath) and core fillers according to Figure 1 dimensions. Secure copper tape

shield ends with a temporary band of vinyl tape ( !Figure 1 ).

3. Using light tension, wrap a mastic seal strip around cable jacket 25 mm ( 1.0 ) below the cut edge ("Figure 1 ).

Figure 1

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B. Attach Metallic Shield Grounding Braids

1. Cut supplied tinned copper grounding braid into three equal 600 mm ( 2.0 foot ) lengths. Expand each braid end for a

distance of 300 mm ( 12.0 ) (!Figure 2 ).

2. Position each expanded ground braid end over cable as shown in Figure 3. Using vinyl tape bands, secure upper braid end to

copper tape shielding 200 mm ( 8.0 ) beyond armor edge ( jacket edge for non-armored cable ) ( ! Figure 3 ). Secure to

cable jacket 15 mm ( 0.60 ) below mastic seal strip ("Figure 3 ).

3. Connect each ground braid upper end to cable copper tape shield using small constant force springs (#Figure 3 ).

Armored cables: Connect three ground braids to cable armoring using one large constant force spring ( $Figure 3 ).

Following application, cinch (twist with hand) each spring to tighten.

4. Apply a second mastic seal strip over ground braids and previously-applied mastic strip (%Figure 3 ).

5. Apply two highly stretched half-lapped layers vinyl tape over mastic seal strips and constant force springs (&Figure 3 ).

Expand !

300 mm ( 12.0 )Ground Braid

Figure 2

Figure 3

15 mm (0.60) 200 mm (8.0)"

Mastic Seal Strip

Vinyl Tape Bands ( typical )

! Ground Braid Over

Copper Tape Shield

No Vinyl Tape

In This Area

2nd

Mastic Strip% $Spring ( Large )

#Spring ( Small )

&Vinyl Tape

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C. Install Cold Shrink Silicone Rubber Breakout Boot Assembly

1. Inspect boot assembly and confirm that all loose plastic core ends are free as shown (!and"Figure 4 ).

2. It will be necessary to unwind a few turns of each finger core to ensure that the boot assembly can be fully seated into the

breakout area of the cable

Caution: Do not unwind too far such that boot fingers begin to collapse.

3. Hold loose neck-end core ribbon " to one side and slide boot assembly over cable end. Guide individual cable cores

through boot assembly fingers.

Hint: View end of cable through boot assembly finger cores to ease cable phase insertion.4. Slide breakout boot assembly onto cable as far as it will go. Large neck-end should fully extend over cable jacket.

Hint: Spread cable phases while sliding boot assembly to ease the installation.

5. Remove large neck-end core. Grasping loose core ribbon end", pull and unwind counter clock-wise around cable.

6. Remove each finger core. Grasping loose core ribbon end!, pull and unwind counter clock-wise around each cable phase

leg.

D. Install Silicone Rubber Re-jacketing Sleeves

1. From the chart below, determine the correct [A] dimension for the QT-II Termination being installed.

(X) QTII Termination Assembly Dimension [A]

( ) J 195 mm ( 7.7 )

( ) K 195 mm ( 7.7 )

( ) L 205 mm ( 8.1 )

( ) M 205 mm ( 8.1 )

Figure 4

!

Finger

Neck

"

Neck CoreBoot Neck !

"

Boot Finger

Finger Core

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2. Place a vinyl tape marker on each cable phase leg at dimension [X] (!Figure 5 ).

Note: [X] = [A] + Lug depth [B]. Allow for crimp growth when using aluminum lugs.

3. Determine required re-jacketing sleeve length for each phase leg ( Distance [S], Figure 5 ). Be sure to include 25 mm

( 1.0 ) breakout boot finger overlap in measurement ( ", Figure 5 ).

4. Using scissors, trim re-jacketing sleeve assembly to length required ( Figure 6 ). Cut tubing and inner braid together.

Note: Inner polyester braid should extend approximately 75 mm ( 3.0 ) beyond re-jacketing tube end before

cutting. There is no need for termination-end braid exposure.

5. Guide one re-jacketing sleeve assembly over each cable phase leg ( Figure 7 ).

Push sleeve assembly from above. Continuously guide the free end maintaining sleeve-to-cable-core alignment.

Figure 5

Right Wrong

Figure 6

Figure 7

Trim Line

Termination End

Breakout Boot End

[S]

Expose 75 mm (3.0)

Re-Jacketing Sleeve

[S]

25 mm (1.0) Overlap [A] [B]

Vinyl Tape over Constant Force Spring

! Marker Tape

[X]

"

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6. Slide re-jacketing sleeve until inner polyester braid is adjacent to breakout boot finger (!Figure 8 )

7. Fold outer silicone tubing back on itself for 25 mm or 1.0 ("Figure 8 ) and trim off exposed polyester braid.

Note: Do not damage silicone tubing while cutting. Sleeve assembly may be rotated to ease trimming. When doing

so, rotate in the direction of the cable copper tape shield wrap.

8. Slide re-jacketing sleeve assembly down until folded tube contacts edge of breakout boot finger (#Figure 8 ).

9. Pull folded silicone tube section down onto breakout boot finger ($Figure 8 ).

Note: Re-jacketing tube end should align with upper edge of installed marker tape ( Figure 8 ). Minor tube

adjustments can be made as needed.

E. Install QT-II Cold Shrink Termination Assemblies

1. Prepare cable phase legs according to dimensions shown ( Figure 9 ). Allow for crimp growth when using aluminum

connectors or lugs.

J-6S K-6S L-6S J-6S

A 275 mm ( 10.8 ) 280 mm ( 11.0 ) 290 mm ( 11.4 ) 290 mm ( 11.4 )

B Lug Depth Lug Depth Lug Depth Lug Depth

C 60 mm ( 2.4 ) 60 mm ( 2.4 ) 60 mm ( 2.4 ) 60 mm ( 2.4 )

D 40 mm ( 1.6 ) 40 mm ( 1.6 ) 40 mm ( 1.6 ) 40 mm ( 1.6 )

25 mm (1.0)

" Silicone Tube Fold-back

! Polyester Braid

#% Re-jacketing Sleeve

over Marker Tape$

Figure 8

Re-jacketing Sleeve

C

D

BAFigure 9

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2. Secure re-jacketing sleeve and cable copper tape shield ends with two half-lapped layers of vinyl tape (!Figure 10 ). Start

taping 20 mm ( 0.8 ) over re-jacketing sleeve, extend 10 mm ( 0.4 ) over cable semi-con layer and return to starting Point.

Note: Do not exceed 10 mm ( 0.4 ) semi-con layer overlap.

Re-jacketing Sleeve

3. Place a termination installation marker tape over re-jacketing sleeve 100 mm ( 3.9 ) from semi-con edge ( Figure 11 ).

4. Special Applications For terminal lug pads that will not pass through the interior of the termination assemblysupport core. Slide the termination assemblies over the cable phase legs before installing the lugs. Position each

termination assembly with its loose core ribbon directed toward the open, lug end, of the cable ( Reference !, Figure 14 as

needed ). Continue with lug installations.

Normal Application - Install terminal lugs:

(a.) For Aluminum Conductors - Thoroughly wire brush conductor strands to remove aluminum oxide layer. Immediately

insert conductor into terminal lug barrel as far as it will go.

(b.) Ensure that each lug face is parallel to equipment bushing or lug connection interface (!Figure 12 ).

(c.) Crimp terminal lug according to manufacturer recommendations. Start at the upper end as shown ( "Figure 12 ).

Remove all traces of oxide inhibitor that may have come out of lug barrel during crimping.

(d.) Thoroughly clean primary insulation and lug barrel area using solvent wipe from supplied cable preparation kit.

Note: Avoid wetting cable semi-conductive layer with solvent.

10 mm (0.4) Maximum20 mm (0.8)

!Vinyl Tape

100 mm ( 3.9 )

Marker Tape

Last Crimp " First Crimp

!

Figure 10

Figure 11

Figure 12

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5. Fill step at cable semi-con cut edge with silicone grease (!Figure 13 ).

6. Install QT-II Termination Assemblies.

(a.) Position termination assembly with loose white core ribbon directed toward the terminal lug (!Figure 14 ).

(b.) Align base of termination ( not the plastic core ) with installation marker tape as shown ("Figure 14 ).

(c.) Grasp loose white core ribbon. Pull and unwind counter clock-wise around cable end (!Figure 14 ).

Note: After the silicone rubber termination makes adequate contact ( approximately 25 mm or 1.0 ), release

the assembly and continue unwinding the core. Do not pull or push on the assembly while unwinding.

(e.) Remove installation marker tape.

7. Seal termination body to terminal lug barrel by wrapping at least two half-lapped layers Scotch!No. 70 Silicone Tapeas shown (!Figure 15 ).

8. Collect shield-grounding braids together and connect to system ground (earth) according to normal practice.

! Silicone GreaseCable Semi-con

Figure 13

Figure 14

Figure 15

"Termination Base Aligned With Marker Tape Edge

Marker TapeLoose Core Ribbon !

!Silicone Tape

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3M and Scotch are trademarks of 3M

Important Notice

Before using this product, you must evaluate it and determine if it is suitable for your intended application. You assumeall risks and liability associated with such use.

Warranty; Limited Remedy; Limited Liability. This product will be free from defects in material and manufactureas of the date of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO,

ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If

this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3Ms option, to

replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M

will not be liable for any loss or damage arising from this 3M product, whether direct, indirect, special, incidental

or consequential regardless of the legal theory asserted.

Electrical Products Division

6801 River Place Blvd.

Austin, TX 78726-9000

http://www.3M.com/elpd 3M 2002 QTII(X)6S-32