3Cold Shrink Silicone Rubber Termination QT-III 7672-S-8-JCNInstructionsIEEE Std. No. 48-1996Class 1 Termination69 kV Class 350 kV BILIEC 6084072,5 kV

Kit Contents:1 Silicone Rubber Lug Seal Insulator Assembly1 Hi-K Stress Control Assembly1 Silicone Rubber Insulator Assembly1 Silicone Rubber Skirted Insulator Assembly1 Pre-formed Ground Braid Assembly3 Constant Force Springs1 Roll Scotch® Electrical Shielding Tape 246 Tubes P55/R Red Compound (Non-Silicone Grease)1 Roll Scotch® Sealing Mastic 2229, 1" (25 mm) wide8 Strips Hi-K Mastic (1-6" × 22", 7-2" × 11")1 Roll Scotch® Silicone Rubber Tape 701 Roll Scotch® Vinyl Electrical Tape Super 88, 1½" × 44'1 6" (150 mm) Hi-K Mastic Pad1 3M™ Cable Cleaning Pads CC-31 Copper Foil Tape Strip 1181, 15" long4 Instruction Sheets

Note: Do not use knives to open plastic bags.

Kit NumberPrimary Insulation

O.D. RangeJacket O.D. Range

Conductor Size RangeAWG (mm2)

7672-S-81.94"–3.08"

(49.3–75.4 mm)2.45"–3.61"

(62.2–91.7 mm)250–1750(120–850)

Table 1

3M™ Cold Shrink Silicone Rubber Skirted Termination Kit QT-III

for Jacketed Concentric Neutral (JCN) Cable

7672-S-8-JCN

78-8126-9535-7-BmCAUTION 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.

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Correct Installation of Termination

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Note: Check to insure all of the 3M™ Termination Assemblies QT-III will fit over the lug. If the lug will not fit through the assembly cores, this termination can not be installed using this lug. Do not remove any of the cores at this time.

1.0 Prepare Cable

1.1 Check to be sure the cable fits within the kit ranges as shown in Table 1.

1.2 Prepare cable using dimensions shown in Figure 1. Be sure to allow for depth of terminal lug plus 0.5" (13 mm) plus crimp growth.

Note: Provide additional exposed conductor to allow for growth of aluminum lugs or connectors during crimping.

Conductor Size 250–350 400–650 750–1000 1100–2000

Growth Allowance 0.25" (6 mm) 0.5" (13 mm) 0.75" (19 mm) Field Determined

Table 2

Figure 1

1.3 Select the roll of 1" (25 mm) wide Scotch® Sealing Mastic 2229 from the kit. Cut a length of the mastic long enough to wrap around the cable jacket. Remove the release liner from the mastic and, using a light tension, apply a single wrap of mastic around the cable jacket 1" (25 mm) from the cut edge. (Figure 2)

Figure 2

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1.4 Bend neutral wires back over applied sealing mastic and secure to cable jacket with vinyl tape 12" (305 mm) below jacket cutback. (Figure 3)

1.5 Select the roll of 1" (25 mm) wide Scotch® Sealing Mastic 2229 from the kit and cut a length of the mastic. Remove the release liner and, using a light tension, apply a single wrap of mastic around the cable jacket over the neutral wires and previously applied mastic. (Figure 3)

Figure 3

1.6 Compress neutral wires into mastic by over-wrapping seal strips with two half-lapped layers of highly-tensioned Scotch® Vinyl Electrical Tape Super 88. Cover all exposed mastic and neutral wires, overlapping 0.25" (6 mm) onto the exposed cable semi-con. (Figure 4)

Note: Take care not to cover the exposed semi-con. A minimum of 2.5" (75 mm) of semi-con must be exposed.

Figure 4

2.0 Install Lug or Connector

2.1 Check to be sure the cable fits within the kit ranges as shown in Table 1.

2.2 Position lug/connector and crimp according to manufacturer’s directions. Remove excess oxide inhibitor and sharp crimp flashing following crimping. Refer to pages 11–12 for 3M lug/connector crimping information up to 1000 kcmil.

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3.0 Clean Cable Insulation and Lug Barrel Using Standard Practice

3.1 Use only aluminum oxide abrasive to finish and polish insulation surface.

3.2 Use abrasive only on cable insulation. Do not use on semi-con.

3.3 When using abrasive, do not reduce the cable insulation diameter below that allowed by the kit.

3.4 Wipe the cable insulation clean with an approved solvent. Do not allow the solvent to touch semi-con insulation shield.

Note: Remove any remaining solvent with 3M™ CC-DRY Cable Cleaning Pads (not supplied with kit) or lint-free cloth.

4.0 Install Termination

4.1 Select the large hi-K mastic pad from the kit. Remove the liners and align the pad with 1" (25 mm) covering the semi-con, and 5" (127 mm) covering the cable insulation. Using light tension, wrap the pad around the cable insulation two times. Trim the pad to overlap the start by approximately 0.25" (6 mm). Taper the pad edge by gently pressing along the edge with your finger. (Figure 5)

Figure 5

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4.2 Wrap two half-lapped layers of highly-tensioned Scotch® Vinyl Electrical Tape Super 88 over the hi-K mastic pad, leaving approximately 0.125" (3 mm) of mastic exposed at each end. Taper the exposed edges of the hi-K mastic onto the cable by gently pressing along the edge with your finger. (Figure 6)

Figure 6

4.3 Starting 5" (127 mm) from the cut end of the insulation, apply 2 tubes of P55/R Red Compund (non-silicone grease) over exposed insulation and vinyl tape-wrapped mastic pad. (Figure 7)

Figure 7

4.4 Select the Stress Control Assembly (medium length tubular assembly on white core) from the kit. Slide the Stress Control Assembly over the lug and cable with the loose core end toward the lug. Butt the Stress Control Assembly Tube (not the core) up to the folded back neutral wires, and remove the core by pulling the loose end while unwinding counter-clockwise. Clean exposed cable insulation after installation. (Figure 8)

Figure 8

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4.5 Select one 2' x 11" (50 mm x 280 mm) hi-K mastic strip from the kit. Remove the liners and wrap around the end of the stress control assembly tube and cable insulation. Position the hi-K mastic so that half covers the stress control assembly tube, and half covers the cable insulation. (Figure 9)

Figure 9

4.6 Wrap two half-lapped layers of highly-tensioned Scotch® Vinyl Electrical Tape Super 88 over the hi-K mastic, leaving approximately 0.125" (3 mm) of mastic exposed at each end. Taper the exposed edges of the hi-K mastic onto the cable by gently pressing along the edge with your finger. (Figure 10)

Figure 10

4.7 Select one or more of the 2" x 11" (50 mm x 280 mm) hi-K mastic strips from the kit. Remove the liner and fold the mastic strip twice lengthwise to form a 0.5" (12 mm) wide strip. (Figure 11)

Figure 11

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4.8 Wrap the mastic strip around the exposed conductor between the cable insulation and lug. Build the mastic up to the insulation O.D. (Figure 12)

Figure 12

4.9 Apply additional wrap(s) of hi-K mastic (not folded) onto the cable insulation for 1" (25 mm) and taper the hi-K mastic 2" (50 mm) onto the lug barrel. (Figure 13) When using a tapered barrel lug, extend the hi-K mastic onto the barrel 2" (50 mm) past the tapered part of the barrel. (Figure 13)

Figure 13

4.10 Select the roll of Scotch® Silicone Rubber Tape 70 from the kit. Using moderate tension, wrap 2 half-lapped layers of tape over the hi-K mastic, leaving approximately 0.125" (3 mm) of mastic exposed at each end. Taper the exposed edges of the hi-K mastic onto the cable by gently pressing along the edge with your finger. (Figure 14)

Figure 14

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4.11 Apply 1 tube of P/55R Red Compound (non-silicone grease) 2" (50 mm) over the lug seal area and onto the cable insulation for approximately 4 inches (100 mm). (Figure 15)

Figure 15

4.12 Select the Silicone Rubber Lug Seal Insulator from the kit. Slide the lug seal insulator onto the cable insulation with the loose core end toward the cable insulation. Position the lug seal insulator tube (not the core) 2" (50 mm) onto the lug barrel. Remove the core by pulling the loose core end while unwinding counter-clockwise. (Figure 16)

Figure 16

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4.13 Apply 3 tubes of P55/R Red Compound to the exposed cable insulation and hi-K stress control assembly tube. Fill the bottom edge of the silicone rubber lug seal the the P55/R Red Compound. Do not apply P55/R Red Compound to the surface of the lug seal insulator tube. (Figure 17)

Figure 17

4.14 Select the Silicone Insulator Assembly (long tubular assembly) from the kit. Slide the Silicone Insulator Assembly over the lug and cable with the loose core end toward the cable jacket. Overlap the lug seal insulator tube, and align the Silicone Insulator Assembly (not the core) with the end of the lug seal. Remove the core by pulling the loose end while unwinding counter-clockwise. (Figure 18)

Figure 18

4.15 Clean the Silicone Insulator Assembly Tube with an approved cable cleaner and wipe dry.

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4.16 Select the Skirted Insulator Assembly from the kit. Carefully remove the red shipping core by pulling the loose end while unwinding counter-clockwise and discard. Slide the Skirted Insulator Assembly over the lug and cable with the loose core end toward the cable jacket. Align the Skirted Insulator Assembly Tube (not the core) with the leading edge of the previously installed Silicone Insulator Assembly Tube. Remove the core by pulling the loose end while unwinding counter-clockwise. (Figure 19)

Figure 19

4.17 Connect the completed termination to equipment/system following standard practice.

4.18 Connect the neutral wires to the ground system following standard practice.

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*Y45 and Y46 accept all Y35 dies (“U” series). For Y45 use PT6515 adapter. For Y46 use PUADP adapter.**Anderson VC6–3, VC6–FT, VC8C and Burndy Y1000 require no die set.

Tooling Index

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