3M 7622-T-110, 7624-T-110, 7626-T-110, 7625-T-110, 7623-T-110 User Manual

4 (1)

3MCold Shrink QT-III Silicone Rubber Indoor

Tubular Termination Kit

With High-K Stress Relief

For Tape Shield, Wire Shield and UniShield® Cable

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

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

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78-8113-5099-6 Rev E

1.0 Kit Contents

3 High–K, Tracking Resistant, Silicone Rubber Terminations

3 Pre-formed Ground Braids

3 Constant Force Springs

3 3MEMI Copper Foil Shielding Tape 1181 Strips, 1/2" x 10"

6 Strips Scotch® Mastic Strip 2230 (black with white release liners, bagged) 1 3MCable 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.

 

Primary Insulation

 

 

Conductor Size Range (AWG & kcmil)

 

 

 

 

 

 

 

 

Kit Number

O.D. Range

Jacket O.D, Range

5 kV

8 kV

15 kV

7622–T–110

0.64" – 1.08"

0.97" – 1.48"

4/0 – 400

3/0 – 300

2 – 2/0

(16,3 – 27,4 mm)

(24,6 – 37,7 mm)

 

 

(35 –

70 mm2)

7623–T–110

0.72" – 1.29"

1.04" – 1.60"

300

– 500

250

– 500

2/0 – 300

(18,3 – 32,8 mm)

(26,4 – 40,6 mm)

 

 

(70 – 150 mm2)

7624–T–110

0.83" – 1.53"

1.12" – 1.87"

500

– 750

350

– 700

4/0 – 500

(21,1 – 38,9 mm)

(28,4 – 47,5 mm)

 

 

(120 –

240 mm2)

7625–T–110

1.05" – 1.80"

1.39" – 2.40"

700 – 1500

600 – 1250

500

– 1000

(26,7 – 45,7 mm)

(35,2 – 61,0 mm)

 

 

(240 –

500 mm2)

7626–T–110

1.53" – 2.32"

1.84" – 2.80"

1750

– 2000

1500

– 2000

1250 – 2000

(38,9 – 58,9 mm)

(46,7 – 71,1 mm)

 

 

(625 – 1000 mm2)

Table 1

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78-8113-5099-6 Rev E

2.0 Instructions for Tape Shielded Cable

Prepare Cable

2.1Check to be sure cable size fits within kit range as shown in Table 1.

2.2Prepare 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 3MEMI 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

2 - 350

400 - 650

750–1000

1250 - 2000

and Connector

1/4” (6 mm)

1/2” (13 mm)

3/4” (19 mm)

Field determined

Growth Allowance

 

 

 

 

 

 

 

 

 

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

3.0Install Ground Braid

3.1Select 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

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3M 7622-T-110, 7624-T-110, 7626-T-110, 7625-T-110, 7623-T-110 User Manual

3.2Position 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

3.3Wrap 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.

3.4Select 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 Trim 1st Scotch® Mastic Strip 2230

Solder Block

2nd Scotch® Mastic Strip 2230

Ground Braid Leg

Cable

Tape

Shield

Figure 4

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78-8113-5099-6 Rev E

3.5Wrap 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.

4.1Check to insure 3MCold 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.

4.2Position connector or lug and crimp according to manufacturer's directions. Remove excess oxide inhibitor and sharp crimp flashings following crimping.

5.0Clean Cable Insulation and Lug or Connector Barrel Using Standard Practice

5.1Wipe the cable insulation with one of the solvent saturated pads from the 3MCable Cleaning Preparation Kit CC-2.

DO NOT ALLOW SOLVENT TO TOUCH SEMI-CON INSULATION SHIELD!

5.2If 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

6.0Install Termination

6.1Slide 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 (pull- unwind-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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: The material being removed at this step is mixed polymers

Vinyl Tape Marker

 

 

 

 

 

 

and can be recycled.

Figure 7

6.2Connect ground braid to system ground according to standard practice.

Correct Installation of Termination on Tape Shielded Cable

 

Vinyl Tape

 

 

Marker

Ridge at End of Cable

 

 

 

 

Insulation Shield (Semi-Con)

 

Ridge at End

 

 

of High-K Tube

 

 

Semi-Con Insulation Shield

Cable Insulation

Environmental Top

Stress Controlling Compound

Conductor

Seal

 

 

 

High-K Stress

 

 

Relief Tube

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78-8113-5099-6 Rev E

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