Surge Arresters

Catalog Data COOPER POWER

CA235029EN
Effective February 2024
Supersedes August 2023 SERIES

UltraSIL polymer-housed VariSTAR

surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV
General
Eaton recognizes the advantages of polymer-
housed arresters with reduced size and weight
and enhanced safety in this generation of
Cooper Power™ series UltraSIL™ polymer-
housed VariSTAR™ surge arresters.
The UltraSIL polymer-housed VariSTAR surge
arrester incorporates the industry recognized
superior polymeric material—silicone rubber.
These arresters provide superior overvoltage
protection for medium-voltage (MV) distribution
systems by using metal oxide varistors (MOVs)
that are manufactured with strict quality control
requirements and have excellent electrical
properties.
After production, every MOV disk must pass a
series of electrical tests designed to ensure the
highest individual disk quality. Eaton’s MOV disk
design has proven its reliability and protective
ability through many years of field service.
UltraSIL polymer-housed VariSTAR surge
arresters are available in 5 kA and 10 kA
Class DH IEC 60099-4 designs.

Construction
The MOV disks are combined with aluminum
end electrodes and are encapsulated in a high-
strength composite wrap insulating material
on our fully automated assembly line using
strict quality control processes that eliminate
manufacturing variances. The composite
collar is cured to the MOV disk stack to form
a solid insulation MOV disk module system
that is inserted and bonded to the industry-
leading track-resistant UltraSIL silicone rubber
housing. This exclusive patented manufacturing
process forms a secondary moisture seal
under the primary silicone rubber housing
seal, which makes the arrester impervious to
moisture and capable of withstanding extreme
electrical, environmental, and cantilever load
conditions. The composite-wrapped UltraSIL
polymer-housed VariSTAR surge arrester design
represents a quantum leap in polymer arrester
technology.
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV
Features and detailed description

STAINLESS STEEL NAMEPLATE INFORMATION

12 mm LINE TERMINAL
3/8 INCH (Optional)

STAINLESS STEEL TOP CAP

ALUMINUM LINE
ELECTRODE

UltraSIL SILICONE RUBBER

HOUSING

METAL OXIDE VARISTOR

(MOV) DISKS

BONDED SOLID INTERFACE

ALUMINUM FIBERGLASS REINFORCED

GROUND EPOXY COMPOSITE
ELECTRODE

OPTIONAL
INSULATING
GLASS-FILLED
THERMOSET
OPTIONAL POLYESTER
GROUND HANGER
LEAD DISCONNECTOR
kV RATING LABEL
(VISIBLE FROM GROUND)

STAINLESS STEEL 12 mm GROUND TERMINAL

3/8 INCH (Optional)

Figure 1. Cutaway illustration of an UltraSIL polymer-housed VariSTAR surge arrester

Arrester type UNS UHS

System application voltages 3–36 kV 3–36 kV

Rated arrester voltages, Ur 3–36 kV 3–36 kV
Power system frequency 50–60 Hz 50–60 Hz
Applicable design and test standard IEC 60099-4 IEC 60099-4
Nominal discharge current 5 kA 10 kA
Line discharge class — 1
High current withstand 65 kA 100 kA
Pressure relief class 20 kA (rms Sym.) 20 kA (rms Sym.)
(B) (B)
Maximum energy, 2000 μs square wave 1.83 kJ/kV Uc 2.85 kJ/kV Uc
(repeatable 1 min)
Repetitive charge transfer, Qrs — 0.5 C
High current, short duration energy handling (65 kA) 3.17 kJ/kV Uc (100 kA) 3.9 kJ/kV Uc

2 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV
Features Design testing
The UltraSIL silicone rubber housing has undergone a wide range The housing material, internal components, and hardware work
of design tests to determine the optimum shed configuration. In as a system and stand up to years of exposure to environmental
addition, long-term environmental testing has verified the lifetime extremes. To ensure a superior level of performance, the
superiority of UltraSIL silicone rubber when compared to other components and the assembled arrester units have been
polymeric insulating materials. subjected to a testing program that accurately simulates years
Independent laboratory tests have verified the superiority of of exposure to field conditions. Tests include:
silicone rubber in terms of hydrophobicity, resistance to UV and IEC 60099-4 testing—Full certification to performance
surface tracking performance in contaminated environments, requirements by an independent laboratory has been completed.
chemical inertness, temperature stability, and other key insulating See CP0606, IEC UHS 10 kA Arrester Certified Test Report, and
properties. CP0504 IEC UNS 5 kA Arrester Certified Test Reports for details.
UltraSIL silicone rubber will not support biological growth (algae Additional reference documents are listed on page 17.
and mildew) and is non-flammable.
A ground lead disconnector is optionally available for use on Routine tests
systems having 20 A or more of available fault current. The A complete automated production test program ensures a quality
disconnector will sense and disconnect the ground terminal in product. Each MOV receives a series of electrical tests. Quality
the unlikely event of arrester failure, preventing a permanent is further demonstrated by tests performed to destruction on
system short circuit. A disconnector that has operated gives a samples from every lot of varistors.
visual indication of internal arrester damage and the need for
arrester replacement. See Figure 2 for the disconnector operating Listed are the varistor tests performed in accordance with
characteristics. IEC 60099-4:
Customers looking to improve system reliability by minimizing • Physical Inspection
wildlife-related outages now have multiple options. In addition • Discharge Voltage
to the standard wildlife protector, featuring two self-adjusting
"valve" style openings (see Figure 11 for a dimensional diagram), • V1mA/cm2
Eaton also offers the more robust line terminal wildlife guard. • Leakage Current at 80% of V1mA/cm2 Voltage
The line terminal wildlife guard is easily retrofitted to existing • High Current, Short Duration Withstand
arrester installations and provides increased electrical insulation
for the high-voltage terminal of the arrester. The flexible design of • Thermal Stability
the line terminal wildlife guard allows insertion of the lead wire • Aging
through the bottom of the integral molded flanges. The access
holes molded above the flanges will allow conductor sizes ranging Each fully assembled UltraSIL polymer-housed VariSTAR surge
from 0 to 0.50 inches in diameter (OD). The line terminal wildlife arrester must pass the following routine tests:
guard geometry allows water to shed away from the surface area
of the wildlife guard while minimizing ice buildup and maintaining
• Physical Inspection
flexibility through extreme operating temperatures. Refer to • Reference Voltage Test
Figure 12 for a dimensional diagram. UNS Iref = 3 mA
For complete wildlife resistance, the ground terminal wildlife UHS Iref = 4 mA
guard can easily be installed alongside the line terminal wildlife • Partial Discharge Test
guard or standard wildlife protector. The ground terminal wildlife at 1.05 x Uc ≤ 10 pc
guard is a compact and economical guard that ensures wildlife
is unable to come in contact with energized objects while on a
grounded surface. See Figure 13 for a dimensional diagram. General application recommendations
The rating of an arrester is the maximum power frequency line-to-
Operation ground voltage at which the arrester is designed to pass the IEC
operating duty test. Table 1 provides a general application guide
The operation of the UltraSIL polymer-housed VariSTAR surge for the selection of the proper arrester rating for a given system
arrester is typical of gapless metal oxide arresters. During steady- voltage and system grounding configuration.
state conditions, line-to-ground voltage is continuously across the
Gapless surge arresters must be selected with sufficient steady-
arrester terminals. When overvoltages occur, the surge arrester
state self impedance to withstand the application of line-to-earth
immediately limits the overvoltage to the required protective level
power frequency voltages under all system conditions
by conducting only the necessary level of surge current to earth.
of operation.
Upon passage of the overvoltage condition, the surge arrester
returns to its initial condition once again, conducting only minimal
leakage current.

www.eaton.com/cooperpowerseries 3
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV
Continuous voltage Table 1. Commonly applied voltage ratings (Ur)
A preliminary selection that is based on selecting an arrester System voltage Arrester rating—Ur
having a “Continuous Operating Voltage”, or Uc, that equals or (kV rms) (kV rms)
exceeds the normal system maximum line-to-earth operating Three-wire
voltage is made. Reference IEC 60099-5. Four-wire star Delta,
star solidly ungrounded,
multi- grounded and resonant
Power-frequency overvoltages grounded neutral at impedance
Nominal Maximum neutral source grounded star
The second application criterion to be met is a condition
established by the effectiveness of system grounding. During 3.3 3.7 3 6 6
a single line-to-earth fault, under maximum system voltage 6.6 7.3 6 9 9
conditions, the arrester selected should have a “Rating” (Ur) that
will not be exceeded by the voltages on the unfaulted phases at 10.0 11.5 9 12 12–15
the point of arrester application. One must pay particular attention 11.0 12.0 9–10 12 12–15
to systems having low coefficients of grounding, ungrounded
16.4 18.0 15 — 18–21
systems, and systems that are resonant grounded or that may
become ungrounded under abnormal conditions of operation. 22.0 24.0 18–21 24 24–27
This second voltage consideration may be modified for various 33.0 36.3 27–30 36 36–36
system conditions as long as the application does not violate the
selected arrester’s “Temporary Overvoltage Capability (TOV)”
(see Figure 3).
Temporary system conditions resulting in sinusoidal power-
Pressure relief (fault current
frequency voltages that exceed arrester “Continuous Operating withstand tests)
Voltage, (Uc)” or even “Arrester Rating, (Ur)” can be allowed.
These tests demonstrate the ability to withstand fault currents for
Consider the permissible magnitude and duration of these
specific durations.
overvoltages (including the full time of system back-up protection),
with appropriate allowances for any recent arrester discharge All UltraSIL polymer-housed VariSTAR surge arresters have been
energies. tested in accordance with the requirements listed in IEC 60099-4
and are non-fragmenting to the levels shown in Table 2.
The voltage withstand capability application on ungrounded
systems is 1.035 per unit of COV (Uc) for 24 hours. Systems that
permit earth faults to remain undetected or operate with one Table 2. Pressure relief tests
phase earthed for periods in excess of 24 hours will require the
IEC pressure Fault current Minimum fault
use of an arrester having a Uc (continuous capability) equal to the Arrester relief amplitude current duration
system maximum phase-to-phase voltage. type class (kA rms) sym. (seconds)
Under some special system conditions, such as transformer 0.8 0.5
UNS/UHS B
energization using certain types of connections and 20 0.2
ferroresonance, higher voltages can be experienced by
the arrester.
Consult with your Eaton representative to have your individual
system application needs reviewed. 10.0

Performance test characteristics

IGNITION TIME (SECONDS)

UltraSIL polymer-housed VariSTAR surge arresters meet the

following design tests as described by IEC 60099-4:
1.0
• Operating duty test
UNS: 20 current surges of 5 kA, 8/20 µs waveshape
followed by two high current surges of 65 kA crest (4/10 µs)
UHS: 20 current surges of 10 kA, 8/20 µs waveshape
followed by two high current surges of 100 kA crest (4/10 µs) 0.1
• Long duration current impulse withstand test
UNS: 18 current surges of 75 A, 1000 µs duration
UHS: 18 current surges of the energy associated with the line
parameters for IEC Class DH performance (approximately
250 A, 2000 µs) 0.01
Following each of these tests, the arresters remain thermally 10 100 1000 10000
stable as verified by:
ARRESTER FAULT CURRENT (A rms)
• Continually decreasing leakage current values during a
30-minute power monitoring period when energized at Uc Figure 2. UNS and UHS disconnector operating characteristics
• No evidence of physical or electrical deterioration
• The In (5 kA or 10 kA) discharge voltage measured after each
test changed less than 5% from the initial values

Full IEC 60099-4 certification has been completed and

independently verified.

4 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV
UltraSIL Class 1 - 10kA
Temporary overvoltage (TOV) capability VariSTAR Arrester
(power frequency withstand voltage versus
1.800
time characteristic) 1.748
1.700
The ability to withstand system power frequency overvoltage 1.650 Prior Duty
conditions is shown in Figure 3. The graph shows for a given 1.600 No Prior Duty

Voltage (per unit COV)

voltage magnitude (on a per unit of Uc basis), the time an arrester 1.558

Voltage (per unit COV)

can survive a temporary power frequency overvoltage condition 1.500
1.518
1.471
and recover without thermal runaway. 1.436
1.400 1.389
1.359
Protective characteristics 1.300 1.286
1.311

1.238
UltraSIL polymer-housed VariSTAR surge arresters provide 1.200
1.217
excellent overvoltage protection for electrical equipment 1.151
throughout the MV distribution system. 1.100 1.089
The protective characteristics of the surge arrester family are
1.000
shown in Table 3 and Table 4. 0.01 0.1 1 10 100 1000 10000
Time (sec)
Time (sec)

Figure 3. Temporary overvoltage capability (followed by Uc),

60 °C ambient, UNS and UHS. The 24-hour TOV without prior
duty is 1.173 per unit of Uc. The 24-hour TOV with prior duty
is 1.035 per unit of Uc.

Table 3. Protective characteristics—UNS, In = 5 kA, IEC 60099-4

Lightning impulse residual voltage (kV crest)
Ur arrester Steep current 8/20 µs current wave
rating Uc MCOV residual voltage
(kV rms) (kV rms) (kV crest) 1.5 kA 3 kA 5 kA 10 kA 20 kA 40 kA
3 2.55 10.9 9.0 9.7 10.4 11.4 13.0 15.1
6 5.1 21.8 17.9 19.4 20.8 22.7 26.0 30.2
9 7.65 31.4 25.8 28.0 30.0 32.8 37.4 43.5
10 8.4 32.7 26.9 29.1 31.2 34.1 38.9 45.3
12 10.2 41.1 33.8 36.5 39.2 42.9 48.9 56.9
15 12.7 51.3 42.2 45.7 49.0 53.6 61.1 71.1
18 15.3 61.6 50.6 54.8 58.8 64.3 73.4 85.3
21 17.0 65.4 53.7 58.2 62.4 68.2 77.9 90.6
24 19.5 76.3 62.7 67.8 72.8 79.6 90.8 106.0
27 22.0 86.3 71.0 76.8 82.4 90.1 103.0 120.0
30 24.4 96.2 79.1 85.6 91.8 100.0 115.0 133.0
33 27.0 107.0 87.8 95.6 102.0 112.0 127.0 148.0
36 29.0 115.0 94.7 103.0 110.0 120.0 137.0 160.0

Table 4. Protective characteristics—UHS, In = 10 kA, Class DH IEC 60099-4

Lightning impulse residual voltage (kV crest)
Ur arrester Steep current 8/20 μs current wave 30/60 switching surge
rating Uc MCOV residual voltage
(kV rms) (kV rms) (kV peak) 1.5 kA 3 kA 5 kA 10 kA 20 kA 40 kA 125 A 500 A
3 2.55 10.8 8.2 8.7 9.1 9.9 10.9 12.3 7.1 7.6
6 5.1 21.5 16.3 17.4 18.2 19.8 21.9 24.7 14.1 15.1
9 7.65 32.4 24.6 26.1 27.3 29.8 33.0 37.1 21.3 22.7
10 8.4 34.4 26.0 27.7 29.0 31.6 34.9 39.4 22.6 24.1
12 10.2 43.2 32.7 34.8 36.4 39.7 43.9 49.5 28.3 30.3
15 12.7 52.2 39.6 42.1 44.0 48.0 53.1 59.8 34.3 36.6
18 15.3 64.8 49.1 52.3 54.7 59.6 65.9 74.2 42.6 45.5
21 17 68.8 52.1 55.4 58.0 63.2 69.9 78.7 45.1 48.2
24 19.5 79.5 60.2 64.1 67.0 73.1 80.8 91.1 52.2 55.8
27 22 92.4 70.0 74.5 77.9 84.9 93.9 106 60.6 64.8
30 24.4 100.5 76.1 81.0 84.7 92.4 102 115 66.0 70.5
33 27 114.2 86.5 92.1 96.3 105 116 131 75.0 80.1
36 29 120.8 91.5 97.3 102 111 123 138 79.3 84.7

www.eaton.com/cooperpowerseries 5
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV
Insulation withstand characteristics
Table 5. Housing insulation withstand voltages, Ur 3–36 kV, UNS and UHS, In = 5 and 10 kA Class DH

Arrester
mounting
configuration

105 mm 127 mm
105 mm 127 mm

Arrester
housing Leakage 1.2/50 µs 1 min. 1 min. 1.2/50 µs 1 min. 1 min. 1.2/50 µs 1 min. 1 min. 1.2/50 µs 1 min. 1 min. 1.2/50µs 1 min. 1 min.
designation distance Strike impulse dry wet impulse dry wet impulse dry wet impulse dry wet impulse dry wet
(digits 6 & 7) (mm) (mm) (kV crest) (kV rms) (kV rms) (kV crest) (kV rms) (kV rms) (kV crest) (kV rms) (kV rms) (kV crest ) (kV rms) (kV rms) (kV crest) (kV rms) (kV rms)

03 183 79 Dry 47 23 92 50 36 70 44 22 85 53 29 70 42 23
04 256 106 (kV 56 34 105 55 38 79 52 33 99 56 37 82 51 33
rms)

05 330 133 104 64 43 117 63 51 89 55 42 109 60 49 90 62 45

06 404 159 117 78 55 126 86 57 93 61 48 119 80 58 97 72 55
07 477 186 129 87 66 137 96 68 98 62 51 122 81 60 107 81 66
08 551 213 140 96 77 148 106 79 104 65 55 126 82 65 118 89 78
09 625 239 — — — 159 116 90 — — — 130 83 70 129 98 89
10 698 266 — — — 171 126 100 — — — 136 86 75 140 106 99
11 772 293 — — — 183 135 111 — — — 142 90 80 152 114 109
12 846 320 — — — 195 144 121 — — — 149 94 86 164 122 119
13 919 346 — — — 207 153 131 — — — 158 99 92 177 130 128
14 993 373 — — — 220 161 140 — — — 167 105 98 190 138 137
15 1067 400 — — — 233 170 150 — — — 177 112 105 204 146 146
16 1140 426 — — — 246 178 159 — — — 187 120 112 218 154 154
17 1214 453 — — — 259 185 168 — — — 199 128 120 233 161 162
18 1288 480 — — — — — — — — — — — — 248 169 169
19 1361 506 — — — — — — — — — — — — 264 178 176
20 1435 533 — — — — — — — — — — — — 280 184 183
21 1509 560 — — — — — — — — — — — — 296 191 189

Table 6. Insulation withstand characteristics of optional insulated mounting bracket

Insulated Bracket mounting length Power frequency
mounting center-to-center Leakage distance Strike voltage withstand 1.2/50 µs impulse
bracket (mm) (mm) (mm) (60 sec, wet, kV) (kV crest)

Standard for 105 150 71 36 70

Ur = 3–10 kV
Standard for 127 226 99 48 80
Ur = 12–36 kV

6 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV
Dimensions and clearances
Outline drawings for common options are shown. Dimensions (shown in mm) for these arrangements are listed in Table 7.

30 30

DIAMETER (All Figures): 0-102

IN = 5 kA, O = 83 mm
IN = 10 kA, O = 89 mm

A A
MOUNTING HOLE
FOR 1/2" or 12 mm O 102-127
65
HARDWARE

43
14

30 30
23 23 14

B B

Figure 4. UltraSIL polymer-housed VariSTAR surge arrester— Figure 6. UltraSIL polymer-housed VariSTAR surge arrester
with optional insulated mounting bracket and disconnector as in Figure 4 with NEMA cross-arm hanger, see Figure 8

30
30

SPACING BETWEEN
SHEDS IS 27 mm
(All Ratings)
RATED CANTILEVER
H
STRENGTH IS MOUNTING HOLE FOR
C 5 kA = 450 Nm 1/2" or 12 mm O
10 kA = 450 Nm HARDWARE
MAXIMUM PULL 14
STRENGTH (Tension)
IS 5,000 N.
28

28

Figure 5. UltraSIL polymer-housed VariSTAR surge arrester Figure 7. UltraSIL polymer-housed VariSTAR surge
without disconnector, for base or cable riser mounting arrester—with optional disconnector mounting bracket
(arrester may be horizontal or vertical with either end at (no disconnector)
line potential)

www.eaton.com/cooperpowerseries 7
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV

Table 7. Dimensional data—UNS and UHS Table 8. Minimum recommended clearances

Dimensions—Figures 4–-7 page 7 (mm) Clearances a
minimum recommended (mm)
Housing
designation UNS UHS
(digits 6 and 7 In = 5 kA In = 10 kA
Ur Table 9) A B C H Ur arrester
rating Phase-to- Phase-to- Phase-to- Phase-to-
03 162 105 146 140 (kV rms) ground phase ground phase
04 190 105 174 168 3 70 95 76 108
05 218 105 202 196 6 95 127 102 140
3–10
06 246 105 230 224 9 127 165 133 178
07 272 105 255 249 10 127 165 133 178
08 300 105 283 277 12 146 184 152 197
06 246 127 230 224 15 165 210 171 222
07 272 127 255 249 18 229 273 235 286
08 300 127 283 277 21 229 273 235 286
09 325 127 308 302 24 267 324 273 337
10 353 127 336 330 27 267 324 273 337
11 381 127 364 358 30 267 324 273 337
12 406 127 390 384 33 318 400 324 413
12–36 13 434 127 418 412 36 318 400 324 413
14 462 127 446 440 a All clearances are measured between center lines of arresters or from center line to earth.
15 488 127 471 465
16 — — 499 —
17 — — 527 —
18 — — 555 —
19 — — 583 —
20 — — 611 —
21 — — 639 —

Table 9. Catalog numbers—VariSTAR distribution-class surge arresters

Arrester With isolator and insulated hanger With isolator, insulated hanger, and With insulated hanger without isolator
rating (Figure 3) NEMA cross-arm bracket (Figure 4) (Figure 6)

3 U*S0303AFDV1AA1 U*S0303AFDV1BA1 U*S0303AFAV1AA1

6 U*S0604AFDV1AA1 U*S0604AFDV1BA1 U*S0604AFAV1AA1
9 U*S0905AFDV1AA1 U*S0905AFDV1BA1 U*S0905AFAV1AA1
10 U*S1005AFDV1AA1 U*S1005AFDV1BA1 U*S1005AFAV1AA1
12 U*S1206AFDV1AA1 U*S1206AFDV1BA1 U*S1206AFAV1AA1
15 U*S1507AFDV1AA1 U*S1507AFDV1BA1 U*S1507AFAV1AA1
18 U*S1808AFDV1AA1 U*S1808AFDV1BA1 U*S1808AFAV1AA1
21 U*S2109AFDV1AA1 U*S2109AFDV1BA1 U*S2109AFAV1AA1
24 U*S2410AFDV1AA1 U*S2410AFDV1BA1 U*S2410AFAV1AA1
27 U*S2711AFDV1AA1 U*S2711AFDV1BA1 U*S2711AFAV1AA1
30 U*S3012AFDV1AA1 U*S3012AFDV1BA1 U*S3012AFAV1AA1
33 U*S3313AFDV1AA1 U*S3313AFDV1BA1 U*S3313AFAV1AA1
36 U*S3614AFDV1AA1 U*S3614AFDV1BA1 U*S3614AFAV1AA1
*Digit 2 Option: N = Normal-Duty, H = Heavy-Duty
Note: All catalog numbers listed above include a universal wildlife protector.

8 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV
Table 10. UltraQUIK™ catalog numbering system for UltraSIL polymer-housed VariSTAR surge arresters

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
U S
Catalog number digits

1 = UltraSIL polymer-housed VariSTAR surge arrester: U

2 = Arrester class: N = In = 5 kA H = In = 10 kA, Class DH
3 = Arrester type: S = VariSTAR
4 & 5 = Arrester rating Ur (Uc): 03 = 3 kV (2.55 kV) 15 = 15 kV (12.7 kV) 27 = 27 kV (22.0 kV)
06 = 6 kV (5.1 kV) 18 = 18 kV (15.3 kV) 30 = 30 kV (24.4 kV)
09 = 9 kV (7.65 kV) 21 = 21 kV (17.0 kV) 33 = 33 kV (27.0 kV)
10 = 10 kV (8.4 kV) 24 = 24 kV (19.5 kV) 36 = 36 kV (29.0 kV)
12 = 12 kV (10.2 kV)

6 & 7 = Housing options per arrester rating—select from table below.

Ù = Standard housing O = Housing options

Digits 6
and 7 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
Total
leakage 183 256 330 404 477 551 625 698 772 846 919 993 1067 1140 1214 1288 1361 1435 1509
distance
(mm)
Arrester
rating
(kV rms)
3 Ù O
6 Ù O O
9 Ù O O O
10 Ù O O O
12 Ù O O O O
15 Ù O O O O O
18 Ù O O O O O O
21 Ù O O O O O
24 Ù O O O O O O
27 Ù O O O O O O O
30 Ù O O O O O O O O
33 Ù O O O O O O O O
36 Ù O O O O O O O

Notes:
1. Protected leakage distance is approximately 45% of total leakage distance (mm).
2. Total leakage distance shown includes 40 mm of the insulated base/mounting bracket.

www.eaton.com/cooperpowerseries 9
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV
Table 10. UltraQUIK catalog numbering system for UltraSIL polymer-housed VariSTAR surge arresters (continued)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
U S
8 = Line stud and lead options:

• 12 mm line terminal options—all threaded studs are 12 mm x 30 mm long (except options L and M), stainless steel
A = without line lead
C = with 300 mm long, 5 mm diameter F = with 450 mm long, 5 mm diameter J = with 750 mm long, 5 mm diameter
insulated lead wire having one ring insulated lead wire having one ring insulated lead wire having one ring
terminal terminal terminal
D = with 300 mm long, 5 mm diameter G = with 450 mm long, 5 mm diameter K = with 750 mm long, 5 mm diameter
insulated lead wire having two ring insulated lead wire having two ring insulated lead wire having two ring
terminals terminals terminals
L = with 45 mm long stud, without M = with 65 mm long stud, without
insulated lead wire (will not allow insulated lead wire (will not allow
use of universal wildlife protector) use of universal wildlife protector)

• 3/8 inch line terminal options—all threaded studs are 3/8 inch x 1-3/16 inch long, stainless steel
0 = without line lead
2 = with 12 inches #6 AWG insulated lead 5 = with 18 inches #6 AWG insulated lead 8 = with 30 inches #6 AWG insulated lead
wire having one ring terminal wire having one ring terminal wire having one ring terminal
3 = with 12 inches #6 AWG insulated lead 6 = with 18 inches #6 AWG insulated lead 9 = with 30 inches #6 AWG insulated lead
wire having two ring terminals wire having two ring terminals wire having two ring terminals

9 = Line terminal accessories

All line terminal accessory hardware is stainless steel (12 mm or 3/8 inches Ø, as required for digit 8).

45/65 mm
45

C = No hardware F = Nut, wire clamp, and universal L = 2 each: nuts, flat washers, and R = Nut and wire clamp
wildlife protector lock washers
(requires “L” or “M” in digit 8)

S = Nut, lock washer, and T = Nut, lock washer (also for U = Nut and 2 wire clamps V = Wire clamp, nut, and flat washer
universal wildlife protector leads with ring terminals,
(also for leads with ring see digit 8)
terminals, see digit 8)

Notes:
1. Wire clamps F, R, and U will accommodate #10 solid to 2/0 AWG or to 4 mm solid diameter wire. Wire clamp V will accommodate 6 mm solid or up to 14 mm diameter stranded conductor.
2. Maximum allowable torque on line terminal is 27 Nm.
3. The universal wildlife protector may only be used with 30 mm or 1-3/16 inch length stud.

10 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV
Table 10. UltraQUIK catalog numbering system for UltraSIL polymer-housed VariSTAR surge arresters (continued)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
U S
10 = Ground terminal options
• 12 mm ground terminal options
With ground lead disconnector and stainless steel stud length of:
D = 12 mm Ø x 25 mm
(requires “1” in digit 12)
Without ground lead disconnector, stainless steel stud length of:
A = 12 mm Ø x 30 mm
B = 12 mm Ø x 45 mm
C = 12 mm Ø x 65 mm
• 3/8 inch ground terminal options
With ground lead disconnector and stainless steel stud length of:
1 = 3/8 inch Ø x 1inch
(requires “1” in digit 12)
Without ground lead disconnector, stainless steel stud length of:
0 = 3/8 inch Ø x 1-3/16 inch

11 = Ground terminal hardware

All ground terminal accessory hardware is stainless steel (12 mm or 3/8 inch Ø, as required for digit 10)

B = No hardware V = Wire clamp and nut W = Washer,
(shown with optional (shown with optional lock washer, and nut
disconnector and insulated disconnector and
mounting bracket) insulated mounting bracket)

Note: Maximum allowable torque on ground terminal is 27 Nm.

12 = Bracket configurations
13 = Mounting options

0 = Base mounted arrester 1 = Insulated mounting bracket 2 = Conductive mounting bracket 3 = Conductive mounting bracket
(required with optional For 3/8 inch hardware for 12 mm hardware
disconnector) (requires “0” in digit 10 and (requires “A”, “B”, or “C” in
(available only if digits 6 and 7 “W” in digit 11 ) digit 10 and “W” in digit 11)
are housing options 15 or less*) See Figure 10 for dimensional See Figure 11 for dimensional
* For more information, contact information. information.
your Eaton representative.

A = Without a B = NEMA cross-arm hanger

mounting bracket (mounting hardware included)
(requires “1”, “2”, or “3” in digit 12)
See Figure 8 for dimensional
information.

www.eaton.com/cooperpowerseries 11
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV
Table 10. UltraQUIK catalog numbering system for UltraSIL polymer-housed VariSTAR surge arresters (continued)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
U S
12 & 13 = Double-digit mounting options with ground terminal wildlife guard

E8 = Ground terminal wildlife guard, insulated hanger

(shown with optional isolator), NEMA cross-arm bracket
(arrester mounting hardware included)
Refer to Figure 8 and Figure 13 for dimensional information.

14 = Nameplate information, see Figures 13 and 14 15 = Packaging

Nameplate information is per IEC 60099-4. Auxiliary nameplates are
available in the following languages: 1 = Individual carton. Each arrester with accessories is shipped in
an individual cardboard carton. Individual cartons are packed
A = English within a heavy-duty quadwall carton having a skid bottom and
B = Español – Mexico suitable for double stacking within an ocean shipping
C = Españ ol – Americas container.
D = Português – Americas
E = Españ́ol – Europa 2 = Individual carton. Each arrester is shipped in an individual
F = Português – Europa cardboard carton. Individual cartons are stacked on a pallet
G = Polski and shrink wrapped, suitable for shipment within NAFTA.
H = Français Quantities per pallet may be adjusted to meet shipping
I = Norsk requirements.
J = Suomeksi
K = Greek
L = Italiano
M = Russian

12 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV

Accessories for the UltraSIL polymer-housed VariSTAR surge arrester

ZERO
To
1.25 4.00

.344
170
6.75 13 114 9
.438
SQUARE 4.12
To 1/2" HARDWARE
5.15 32
4.50

.438 SQUARE 2.56

HOLE 11 SQUARE
HOLE

.500 11 SQUARE
1.50
3/8" HARDWARE
8
13
Figure 8. NEMA cross-arm hanger can be specified with a “B” in digit 13
(all dimensions are as required to be in inches, per NEMA)

170 170
13 114 9 13 114

32 32

11 SQUARE (2) 13 mm O
HOLE

11 SQUARE
8
13
8 GALVANIZED STEEL
(All dimensions in mm)
13 GALVANIZED STEEL
(All dimensions in mm)

Figure 9. Conductive base mounting for use with 3/8 inch Figure 10. Conductive base mounting for use with 12 mm
hardware. Can be specified with a "2" in digit 12. (Requires hardware. Can be specified with a “3” in digit 12. (Requires
“0”, "A", "B", or "C" in digit 10, “W” in digit 11) "0", “A”, “B” or “C” in digit 10, “W” in digit 11)

170
13 114

32

(2) 13 mm O

8
13

www.eaton.com/cooperpowerseries 13
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV

UNIVERSAL
VALVE
OPENING
UNIVERSAL
VALVE
OPENING
20

56
(All dimensions in mm)

152°
26
SLOTS
MAY BE
CUT HERE
UNIVERSAL
VALVE
64 OPENING

SIDE VIEW TOP VIEW

Figure 11. Universal wildlife protector for line terminal (catalog number AV346X1C) adds 5 mm to arrester height above
line terminal stud. To be used only with 3/8 inch or 12 mm Ø line hardware of standard length, 1-3/16 inches and 30 mm
respectively.

199
12 ø

75

53
50
42

96

Figure 12. Optional line terminal wildlife guard (catalog number AV698X1C) (all dimensions in mm)

87

80

Figure 13. Optional ground terminal wildlife guard (catalog number AV731X1C) (all dimensions in mm). Left shows attachment
of ground terminal wildlife guard, right image shows ground terminal wildlife guard completely installed.

14 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV

UNS 5 kA

RATING MCOV
(Ur) (Uc)
___ kV ___ kV
MMYY Assembled
in Mexico
UltraSIL® VariSTAR®
DIST. ARRESTER

Figure 14. In = 5 kA, UNS nameplate—stamped in stainless steel top cap

VARISTAR® SURGE ARRESTER PARARRAYOS VARISTAR® Ur = kV

ULTRASIL™ TYPE UNS-ZNO TIPO ULTRASIL™ UNS-ZNO Uc = kV
IN = 5 kA IEC 60099-4 P.R. = 20 kA sym IN = 5 kA CEI 60099-4 AdP = 20 kA sim

(ENGLISH) (ESPAN˜ OL - EUROPA)

APARTARRAYOS VARISTAR Ur = DESC. DE SOBRET. VARISTAR

® ®
kV
TIPO ULTRASIL™ UNS-ZNO Uc = kV TIPO ULTRASIL™ UNS-ZNO
IN = 5 kA IEC 60099-4 AdP = 20 kA sim IN = 5 kA IEC 60099-4 LdeS = 20 kA sim

(ESPAN˜ OL - MEXICO) (PORTUGUEˆS - EUROPA)

PARARRAYOS VARISTAR OGRANICZNIK PRZEPIEC VARISTAR®

®
Ur = kV
TIPO ULTRASIL™ UNS-ZNO Uc = kV ULTRASIL™ TYP UNS-ZNO
IN = 5 kA IEC 60099-4 AdP = 20 kA sim IN = 5 kA IEC 60099-4 Pr = 20 kA sym

(ESPAN˜ OL - AMERICAS) (POLSKI)

´ RA-RAIOS VARISTAR® PARAFOUDRE VARISTAR

®
PA Ur = kV Ur = kV
TIPO ULTRASIL™ UNS-ZNO Uc = kV MODELE´ ULTRASIL™ UNS-ZNOUc = kV
IN = 5 kA IEC 60099-4 Sp = 20 kA sim IN = 5 kA CEI 60099-4 LdP = 20 kA sym

(PORTUGUEˆS - AMERICAS) (FRANÇAIS)

VARI
´ STAR® OVERSPENNINGSAVLEDER VARISTAR® YLIJÄNNITESUOJA
ULTRASIL™ TYPE UNS-ZNO ´ SIL™ TYYPPI UNS-ZNO
ULTRA
IN = 5 kA IEC 60099-4 KORTSLUTTKAP = 20 kA sym IN = 5 kA IEC 60099-4 RTV = 20 kA sym

(NORSK) (SUOMEKSI)

ALEXIKEPAYNO M.T. VARISTAR

®
SCARICATORE M.T. VARISTAR®
TYPOS ULTRASIL™ UNS - ZNO TIPO´ ULTRASIL™ UNS-ZNO
IN =5 kA KLASH 1 IEC 60099-4 EKT PIES = 20 kA Sym IN = 5 kA CEI 60099-4 P.R. = 20 kA sym

(GREEK) (ITALIANO)

(RUSSIAN)

Figure 15. In = 5 kA, UNS auxiliary nameplates

VARISTAR® SURGE ARRESTER PARARRAYOS VARISTAR® Ur = kV

ULTRASIL™ TYPE UHS-ZNO TIPO ULTRASIL™ UHS-ZNO Uc = kV
IN = 10 kA CLASS 1 IEC 60099-4 P.R. = 20 kA sym IN = 10 kA CLASE 1 CEI 60099-4 AdP = 20 kA sim

(ENGLISH) (ESPAN˜ OL - EUROPA)

APARTARRAYOS VARISTAR Ur = DESC. DE SOBRET. VARISTAR®

®
kV
TIPO ULTRASIL™ UHS-ZNO Uc = kV TIPO ULTRASIL™ UHS-ZNO
IN = 10 kA CLASE 1 IEC 60099-4 AdP = 20 kA sim IN = 10 kA CLASSE 1 IEC 60099-4 LdeS = 20 kA sim
www.eaton.com/cooperpowerseries 15
(ESPAN˜ OL - MEXICO) (PORTUGUEˆS - EUROPA)
 APARTARRAYOS VARISTAR®Ur = kV DESC. DE SOBRET. VARISTAR
®

TIPO ULTRASIL™ UNS-ZNO Uc = kV TIPO ULTRASIL™ UNS-ZNO

IN = 5 kA IEC 60099-4 AdP = 20 kA sim IN = 5 kA IEC 60099-4 LdeS = 20 kA sim

(ESPAN˜ OL - MEXICO) (PORTUGUEˆS - EUROPA)

Catalog Data CA235029EN

PARARRAYOS VARISTAR
®
Ur = kV UltraSIL
OGRANICZNIK PRZEPIEC polymer-housed
VARISTAR ® VariSTAR
TIPO ULTRASIL™ UNS-ZNO
Effective February 2024 Uc = kV ULTRAsurge
SIL™ TYParresters
UNS-ZNO 5 kA and 10 kA Class DH
IN = 5 kA IEC 60099-4 AdP = 20 kA sim IN = 5 kA IEC 60099-4 Pr = 20 kA sym
IEC 60099-4 for MV systems to 36 kV
(ESPAN˜ OL - AMERICAS) (POLSKI)

´ RA-RAIOS VARISTAR PARAFOUDRE VARISTAR

® ®
PA Ur = kV Ur = kV
TIPO ULTRASIL™ UNS-ZNO Uc = kV MODELE´ ULTRASIL™ UNS-ZNOUc = kV
IN = 5 kA IEC 60099-4 Sp = 20 kA sim IN = 5 kA CEI 60099-4 LdP = 20 kA sym

(PORTUGUEˆS - AMERICAS) (FRANÇAIS)

UHS 10 kA
VARI
´ STAR® OVERSPENNINGSAVLEDER VARISTAR® YLIJÄNNITESUOJA
ULTRASIL™ TYPE UNS-ZNO ´ SIL™ TYYPPI UNS-ZNO
ULTRA
IN = 5 kA IEC 60099-4 KORTSLUTTKAP = 20 kA sym IN = 5 kA IEC 60099-4 RTV = 20 kA sym
RATING MCOV
(NORSK) (SUOMEKSI)
R® (Ur) (Uc)
___ALEXIKEPAYNO
kV M.T. VARISTAR
®
___ kV SCARICATORE M.T. VARISTAR®
TYPOS ULTRASIL™ UNS - ZNO TIPO´ ULTRASIL™ UNS-ZNO
IN =5 kA KLASH 1 IEC 60099-4 EKT PIESAssembled
MMYY = 20 kA Sym IN = 5 kA CEI 60099-4 P.R. = 20 kA sym

(GREEK) in Mexico (ITALIANO)

UltraSIL® VariSTAR®
DIST. ARRESTER
m

(RUSSIAN)
Figure 16. In = 10 kA, Class DH, UHS nameplate—stamped in stainless steel top cap

VARISTAR® SURGE ARRESTER PARARRAYOS VARISTAR

®
Ur = kV
ULTRASIL™ TYPE UHS-ZNO TIPO ULTRASIL™ UHS-ZNO Uc = kV
IN = 10 kA CLASS 1 IEC 60099-4 P.R. = 20 kA sym IN = 10 kA CLASE 1 CEI 60099-4 AdP = 20 kA sim

(ENGLISH) (ESPAN˜ OL - EUROPA)

APARTARRAYOS VARISTAR Ur = DESC. DE SOBRET. VARISTAR

® ®
kV
TIPO ULTRASIL™ UHS-ZNO Uc = kV TIPO ULTRASIL™ UHS-ZNO
IN = 10 kA CLASE 1 IEC 60099-4 AdP = 20 kA sim IN = 10 kA CLASSE 1 IEC 60099-4 LdeS = 20 kA sim

(ESPAN˜ OL - MEXICO) (PORTUGUEˆS - EUROPA)

PARARRAYOS VARISTAR
®
Ur = kV OGRANICZNIK PRZEPIEC VARISTAR®
TIPO ULTRASIL™ UHS-ZNO Uc = kV ULTRASIL™ TYP UHS-ZNO
IN = 10 kA CLASE 1 IEC 60099-4 AdP = 20 kA sim IN = 10 kA KLASA 1 IEC 60099-4 Pr = 20 kA sym

(ESPAN˜ OL - AMERICAS) (POLSKI )

PA´ RA-RAIOS VARISTAR® Ur = kV PARAFOUDRE VARISTAR

®
Ur = kV
TIPO ULTRASIL™ UHS-ZNO Uc = kV MODELE ´ ULTRASIL™ UHS-ZNO Uc = kV
IN = 10 kA CLASSE 1 IEC 60099-4 Sp = 20 kA sim IN = 10 kA CLASSE 1 IEC 60099-4 LdP = 20 kA sym

(PORTUGUEˆS - AMERICAS) (FRANÇAIS)

VARI
´ STAR® OVERSPENNINGSAVLEDER VARISTAR® YLIJÄNNITESUOJA
ULTRASIL™ TYPE UHS-ZNO ´ SIL™ TYYPPI UHS-ZNO
ULTRA
IN =10 kA KLASSE 1 IEC 60099-4 KORTSLUTTKAP = 20 kA sym IN = 10 kA LUOKKA 1 IEC 60099-4 RTV = 20 kA sym

(NORSK) (SUOMEKSI)

ALEXIKEPAYNO M.T. VARISTAR® SCARICATORE M.T. VARISTAR®

TYPOS ULTRASIL™ UHS - ZNO TIPO´ ULTRASIL™ UHS-ZNO
IN = 10 kA IEC 60099-4 EKT PIES = 20 kA Sy m IN = 10 kA CLASSE 1 IEC 60099-4 P.R. = 20 kA sym

(GREEK) (ITALIANO)

(RUSSIAN)

Figure 17. In = 10 kA, Class DH, UHS auxiliary nameplates

A¥E•IKEPAYNO
´ M.T. VARISTAR®
ULTRASIL™ TYPE UNS-ZNO
IN = 5 kA IEC 60099-4 KORTSLUTTKAP = 20 kA sym
A¥E•IKEPAYNO M.T. VARISTAR®
ULTRASIL™ TYPE UNS-ZNO
IN = 5 kA IEC 60099-4 KORTSLUTTKAP = 20 kA sym

16 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV
Additional information
• MN235XXXEN, UltraSIL Polymer-Housed VariSTAR Surge
Arresters IEC 60099-4 for MV Systems to 36 kV Installation
Instructions
• B235-08022, Superior Protection for Arresters and Wildlife
• CP0504, Design Test Report Summary, 5 kA
• CP0606, Design Test Report Summary, 10 kA
• CP1210 a, CESI Water Immersion Test for Isolator, IEC 60099-4,
Edition 2.2 (2009-05)
• CP1211 a, CESI Isolator Disconnector Operation Test for
Isolator, IEC 60099-4, Edition 2.2 (2009-05)
• CP1212 a, CESI Long-Duration Current Impulse Withstand Test
for Isolator, IEC 60099-4, Edition 2.2 (2009-05)
• CP1213 a, CESI Operating Duty Test for Isolator, IEC 60099-4,
Edition 2.2 (2009-05)
a Contact your Eaton representative.

www.eaton.com/cooperpowerseries 17
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV

18 www.eaton.com/cooperpowerseries
UltraSIL polymer-housed VariSTAR Catalog Data CA235029EN
surge arresters 5 kA and 10 kA Class DH Effective February 2024
IEC 60099-4 for MV systems to 36 kV

www.eaton.com/cooperpowerseries 19
Catalog Data CA235029EN UltraSIL polymer-housed VariSTAR
Effective February 2024 surge arresters 5 kA and 10 kA Class DH
IEC 60099-4 for MV systems to 36 kV

Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com

Eaton’s Power Systems Division

2300 Badger Drive
Waukesha, WI 53188
United States
Eaton.com/cooperpowerseries

© 2024 Eaton
All Rights Reserved Eaton is a registered trademark.
Printed in USA
Publication No. CA235029EN / ZD28409 All other trademarks are property
February 2024 of their respective owners.