3M™ Cold Shrink QT-II

Silicone Rubber Termination Kit

5620K Series, for 5–15 kV
Data Sheet

1. Product Description • High-K stress control. Specially formulated high-impulse

material minimizes surface stress by uniformly distributing
3M™ Cold Shrink QT-II Silicone Rubber Termination Kits the electrical field over the entire surface of the insulator.
5620K Series contain one-piece, non-skirted, silicone
rubber terminations, qualified as IEEE Class I for weather- • Compact design provides for easier installation in
protected applications. Termination assemblies consist restricted spaces.
of a high dielectric constant (High-K) stress control tube • Silicone rubber insulators and EPDM stress control tubes
insulated with a non-tracking silicone rubber insulator, are compatible with all common solid dielectric insula-
prestretched and loaded together onto a removable core. The tions, such as polyethylene, cross-linked polyethylene
kits are designed for terminating solid dielectric shielded (XLP), and ethylene propylene rubber (EPR).
power cable rated 5 through 15 kV, with ribbon shield, wire
shield and UniShield® constructions. Stress Control
Kit Contents: The QT-II termination is designed to control the electric
field stress distribution with a special High-K material
Each kit contains sufficient quantities of the following which is an integral part of the termination. The High-K
materials to make three single-phase terminations material, with a dielectric constant (K) of approximately
(compression lugs are not included in the kit). 30, capacitively distributes the field that surrounds the
3 High-K, Tracking Resistant, Silicone Rubber Terminations termination.
3 Mechanical Ground Strap Assemblies Electrical flux is refracted to distribute the voltage stress
9 Strips Scotch® Mastic Strip 2230 (black with white in a controlled manner along the entire termination length
release liners, bagged) extending beyond the cable shield cutoff. By controlling the
3 Strips Scotch® Electrical Shielding Tape 24 (Used for electrical field, the stress concentrations within the installed
termination and on the termination insulator surface are
Wire Shielded Cable only)
kept below 15 volts per mil at rated voltage. Within a 15 kV
3 Strips Scotch® Self-Fusing Silicone Rubber Electrical cable, the stress concentrations in a continuous length of
Tape 70 (except 5625-K Kit which has one roll) shielded cable are typically 50 V/mil adjacent to the shield
3 3M™ EMI Copper Foil Shielding Tape 1181 Strips, 1/2" to about 70 V/mil at the conductor. The QT-II termination is
x 10" designed to reduce cable stresses at the termination to less
than those in the continuous shielded portion of the cable.
3 Packs of Silicone Grease
1 3M™ Cable Cleaning Preparation Kit CC-2 The figure below illustrates an actual computerized stress
plot of the QT-II termination.
1 Instruction Manual
Termination Features: F CAUTION
• Conforms to IEEE Standard 48 requirements for Class I,  orking around energized electrical systems may cause serious
W
15 kV terminations. injury or death. Installation should be performed by personnel
familiar with good safety practice in handling electrical equipment.
• One-piece versatile design, allowing quick installation De-energize and ground all electrical systems before installing
and accommodating a wide range of cable sizes. product.
• Cold Shrink delivery system for easy installation. Simply
place termination over prepared cable and unwind core to
shrink into place (no force fit required).

Semi-conductive
Insulation Shield

Figure 1
Insulation 3
2. Applications EPDM Rubber High-K Stress Control Tube
Physical Properties
Designed for:
Test Method Typical Value*
• 5, 8, and 15 kV voltage classes. Permanent Set
(3M Test Method)
• Tape-shielded, wire-shielded, and UniShield® cables. 22 hours @ 212° F (100° C) 20%
100% elongation
• Solid dielectric insulations, such as polyethylene, XLP, 5 minute recovery
and EPR. Ultimate Tensile Strength 1394 psi
(ASTM D-42) (9.6 MPa)
• Contaminated and non-contaminated indoor (weather- Electrical Properties
protected) locations. Test Method Typical Value*

• Free-hanging or bracket-mounting arrangements. Dielectric Constant (K)

(ASTM-D-150) @ 400 V @ 3 kV
60 Hz; @ 60% strain
• Upright or inverted installations.
73° F (23° C) 25.7 28.8
• Switchgear, transformer, motor lead, bus, and similar 149° F (65° C) 24.5 27.2
194° F (90° C) 25.2 27.7
connections.
vs. frequency
3. Environmental Classification Note @ 73° F (23° C)
150 Hz 35
Indoor terminations, such as the 3M™ Cold Shrink QT‑II 1,000 Hz 29
10,000 Hz 24
Termination Kit 5620K/6020K series products, can be 100,000 Hz 20
specified for most outdoor, pad-mounted switchgear and Dissipation Factor
transformer applications, since these enclosure interiors (ASTM-D-150) @ 400 V @ 3 kV
60 Hz; @ 60% strain
are protected from direct exposure to the elements. The
user is reminded, however, that many of these cabinets 73° F (23° C)
149° F (65° C)
0.096
0.093
0.166
0.165
are vented and that their interiors can be subjected to the 194° F (90° C) 0.132 0.161
effects of condensation and wind-blown contaminants. vs. frequency
When conditions of this nature are suspected for a given @ 73° F (23° C)

installation, skirted QT-II terminations should be selected 150 Hz 0.16

1,000 Hz 0.15
in order to provide greater leakage current and flashover 10,000 Hz 0.14
protection. 100,000 Hz 0.12
*Average values. Not intended for specification purposes.
4. Physical and Electrical Properties
Silicone Rubber Insulator
QT-II 5620K series terminations can be used on cables with Physical Properties
a rated maximum operating temperature of 105° C and an
Test Method Typical Value*
emergency overload rating of 140° C. QT-II 5620K series
Color Munsel Gray
terminations meet all requirements of IEEE Standard 48,
Permanent Set
“IEEE Standard Test Procedures and Requirements for (3M Test Method)
High-Voltage Alternating-Current Cable Terminations” 22 hours @ 212° F (100° C) 8%
100% elongation
and are designated Class I for indoor or weather-protected 5 minute recovery
locations. The current rating of these terminations meets or Ultimate Tensile Strength 1200 psi
exceeds the current rating of the cables on which they are (ASTM D42) (8.28 MPa)
installed. Electrical Properties
Test Method Typical Value*
Typical Dimensions
Dielectric Constant (S.I.C.)
Dimension A Wet Creepage Distance
Kit No. (ASTM-D-150)
Maximum (Maximum)
73° F (23° C) 3.4
5621K 6.5 (165 mm) 6.5 (165 mm)
194° F (90° C) 3.0
5622K 6.5 (165 mm) 6.5 (165 mm) 266° F (130° C) 2.7

5623K 7.0 (178 mm) 7.0 (178 mm) Dissipation Factor

(ASTM-D-150)
5624K 7.0 (178 mm) 7.0 (178 mm)
73° F (23° C) 0.4%
5625K 7.0 (178 mm) 7.0 (178 mm) 194° F (90° C) 1.3%
266° F (130° C) 1.2%
Dielectric Strength
(ASTM-D-149) 507 V/mil (20 kV/mm)
75 mil (1.90 mm) gap
Track Resistance
(ASTM-2303) 10 hrs
Figure 2 2.5 kV, 10 k Ohms
Termination Selection Guide
Conductor Size Range (AWG and kcmil)
Cable Insulation
Kit No. 5 kV – 100% 5 kV – 133% 8 kV – 133% 15 kV – 100% 15 kV – 133%
O.D. Range
8 kV – 100%
5621K 0.32–0.46" (8,1–11,7 mm) 8–4 8–6 8 — —
5622K 0.44–0.65" (11,2–16,5 mm) 2–2/0 4–1/0 6–1 — —
5623K 0.56–0.87" (14,2–22,1 mm) 2/0–250 1/0–4/0 1–3/0 4–2/0 4–1
5624K 0.78–1.30" (19,8–33,0 mm) 300–750 250–750 4/0–600 2/0–500 1–350
5625K 1.09–1.80" (27,7–45,7 mm) 600–1500 600–1500 500–1250 500–1250 350–1000

5. Specifications Operating Temperatures

Product Insulation Class (kV) Normal Operation (deg. C) Emergency Operation
(deg. C)
The cable termination must have a voltage class rating 5 105 140
equal to or greater than the cable being terminated. The 8 105 140
rating shall be 5, 8, or 15 kV as an IEEE Standard 48 Class I
15 105 140
termination. It must have a maximum continuous operating
Reference: AEIC CS5 and AEIC CS6.
temperature rating of 105° C, with an emergency overload
rating of 140° C. The termination stress control shall be Typical Performance of 5620K Series QT-II
capacitive and constructed of High-K EPDM rubber. The Results
termination insulator shall be of a non-skirted tubular Test 5 kV Class 15 kV Class
design, constructed of non-tracking silicone rubber, munsel (5621K, (5623K,
5622K) 5624K, 5625K)
gray in color. The termination must be of a prestretched
Minimum 1 min. withstand 25 kV–rms 50 kV–rms
cold shrink design, installed without the application of a
Minimum 6 hr. withstand 15 kV–rms 35 kV–rms
heat source. The termination kit shall include all materials
required (except the lug), including solderless mechanical Average Corona: CSV 10 kV–rms 27 kV–rms

ground straps, and shall accommodate ribbon (tape), wire, Average Corona: CEV 8.5 kV–dc 23 kV–dc
or UniShield® shielded cables. Minimum 15 min. DC withstand 50 kV–dc 75 kV–dc
+105 kV–crest +130 kV–crest
The Class I termination kits shall be used with UL listed Avg. max. impulse withstand
–105 kV–crest –130 kV–crest
copper or aluminum compression lugs.
Engineering/Architectural Corona Tests

Terminating of all 5, 8, and 15 kV shielded power cables, The purpose of corona testing is to ensure that all properly
indoors and in weather-protected equipment, shall be installed terminations operate corona-free at a minimum of
performed in accordance with instructions included in the 150% of their operating voltage. For the test, an applied test
3M™ Cold Shrink QT-II Termination Kit 5620K series. This voltage is gradually increased until discharges appear on
shall include all weather-protected areas for tape or ribbon the test set oscilloscope display. The voltage at which these
shield, wire shield, and UniShield cables. The termination discharges reach a magnitude of 3 picocoulombs is recorded
kits shall be used in conjunction with 3M™ Scotchlok™ Lugs as the corona starting voltage (CSV). The applied voltage
30000 or 40000 series, or 3M™ Stem Connectors SC Series. is then lowered until the discharge level drops below 3
picocoulombs, and this is recorded as the corona extinction
6. Performance Tests voltage (CEV).
IEEE Standard 48 Tests Alternating Current Withstand Tests

Insulation BIL 60 Hz 60 Hz DC Corona All 5620K series terminations meet the IEEE Standard 48
Class (kV) (kV-crest) 1 min dry 6 hr dry 15 min dry Extinction requirements for a Class I termination. As the terminations
withstand withstand withstand Voltage
(kV-rms) (kV-rms) (kV-avg) @ 3 pC are specified for indoor (weather-protected) applications, the
(kV min) 60Hz 10-second wet withstand test does not apply.
5 75 25 15 50 4.5
Lightning Impulse Tests
8 95 35 25 65 7.5
15 110 50 35 75 13.0 For these tests a 1.2 x 50 microsecond voltage wave is
applied to the termination lug. The testing consists of both
positive and negative polarity surges per IEEE Standard 48
BIL requirements. The 5620K series terminations exceed
these BIL requirements.
Sealing Tests 5. Install lug using a listed crimping tool and die.
Termination top and bottom seals are tested by applying 6. Apply top seal and bottom seal (bottom seals are optional
7 psi (0.05 MPa) to the cable conductor strands with the to obtain a Class 1 termination) (Figure 5).
termination ends submerged in water. Both seals withstand Ground
this internal air pressure for six hours without leaking. Strap

7. Installation Techniques
Detailed instructions are included in each kit to provide the Top Seal
installer with all information required to properly install the
appropriately sized 3M™ Cold Shrink QT-II Termination Kit Figure 5
5620K series. A brief summary of the installation steps for
8. Maintenance & Storage
tape-shielded cable is outlined as follows:
1. Prepare cable according to standard procedure. The termination assemblies are not affected by
freezing storage temperatures. Normal stock rotation is
2. Install ground strap assembly (does not apply to recommended. As provided, in the expanded state, QT-II
UniShield® cable) (Figure 3). terminations 5620K series have an on-shelf storage life of
3. Fill in the step at the semiconductor insulation shield cut three years from the date of manufacture.
edge using silicone grease. These terminations can be field-tested by using normal cable
Cable Jacket
Metallic Tape Shield
testing procedures (reference: ANSI/IEEE Standard 400
Edge
“Guide for Field Testing and Evaluation of the Insulation
of Shielded Power Cable Systems"). Refer to most recent
Ground Strap Silicone Grease version.
Constant-Force Spring
(facing downward) 9. Availability
Figure 3 3M Cold Shrink QT-II Termination Kits 5620K series are
4. Install termination onto cable, and unwind core, allowing available in five kit sizes for terminating shielded power
termination to shrink into place (Figure 4). cables rated 5 through 15 kV. Please contact your local
distributor; available from 3M.com/electrical [Where to
Buy] or call 1.800.245.3573.

Figure 4
3M, Scotch and Scotchlok are trademarks of 3M Company. UniShield® is a registered trademark of General Cable Technologies Corp.

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3
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