Surge Arresters. UltraSIL Housed VariSTAR Station Class Surge Arresters GENERAL CONSTRUCTION

Surge Arresters UltraSIL Housed VariSTAR Station Class Surge Arresters Electrical Apparatus 235-88 GENERAL Cooper Power Systems has set a new standard of excellence for polymerhoused station class surge arresters. Enhancements in arrester design allow Cooper to offer increased cantilever strength and improved energy handling capability. The UltraSIL Housed VariSTAR Type US, UH, and UX Station Arresters incorporate the industry recognized superior silicone rubber housing. Cooper Power Systems Type US Arresters have passed all IEEE Standard C62.11 test requirements for station class arresters and have energy handling capability designed for most applications. UH and UX arresters also meet all test requirements for station class arresters but have higher energy handling capability for those applications which require it. TABLE 1 UltraSIL (US, UH, and UX) Station Class Ratings and Characteristics Arrester Characteristic Rating Arrester Voltage Ratings (kv) 3-240 Rated Discharge Energy Single Double (kj/kv of MCOV) Impulse Impulse Rating Rating* US (3-108 kv) 3.4 5.5 UH (3-108 kv) US (120-240 kv) 5.6 8.9 UX (3-108 kv) UH (120-240 kv) 8.9 14.5 System Frequency (Hz) 50/60 Impulse Classifying Current (ka) 10 High Current Withstand** (ka) 100 Pressure Relief Rating (ka rms sym.) 80 Cantilever Strength (in-ibs) MDCL- Ultimate Static*** US (3-108 kv) 15,000 6,000 UH (3-108 kv) US (120-240 kv) 20,000 8,000 UX (3-108 kv) UH (120-240 kv) 35,000 14,000 * Double impulse rating assumes a two shot energy discharge within one minute. ** High current, short duration withstand (100 ka, 4/10 µs) *** Maximum design cantilever load static or maximum working load is 40% of the ultimate. February 2004 Supersedes 4/99 Printed in U.S.A. Figure 1. UltraSIL Housed VariSTAR Station Class Surge Arrester family. CONSTRUCTION The unique construction of UltraSIL Housed Type US, UH and UX Class Arresters begins with world class Metal Oxide Varistor (MOV) disks produced at our dedicated manufacturing facility in Olean, NY. By manufacturing our own disks we maintain a strict quality control over the entire production process, from initial raw material inspection to final physical and electrical testing of each disk. In addition, by controlling the manufacturing process of both disks and arresters, we achieve the optimal combination. Cooper Power Systems produces MOV disks of unsurpassed quality through continuous improvements in disk formulation and manufacturing technology. The end result is a long history of in-service use with outstanding durability and protective capability. Arrester production begins by stacking glass-collared MOV disks in series with aluminum end electrodes. Our proprietary process wraps the assembly with a high-strength woven fiberglassreinforced epoxy composite. When cured, the arrester module is capable of withstanding extreme electrical and cantilever load conditions. The UltraSIL silicone rubber housing utilizes an interference fit and is bonded onto the internal module to form a 1

UltraSIL Housed VariSTAR Station Class Surge Arresters UltraSIL SILICONE RUBBER HOUSING ALUMINUM ELECTRODE ALUMINUM ALLOY MOUNTING BASE Figure 2. Illustration of 10 kv UltraSIL Housed VariSTAR Station Class Arrester. solid, void-free, high-dielectric strength insulation system. Once the housing is in place, each arrester must pass a strict series of electrical tests to insure the highest level of in-service performance. The silicone rubber housing results in lighter weight than similarly rated porcelain housed arresters. The silicone rubber housing is also less sensitive to physical damage than porcelain. Also, when compared to other polymeric housing materials, silicone rubber generates significantly lower external power losses under contaminated conditions. FEATURES The UltraSIL silicone rubber housing was selected for its superior insulation performance as compared to other polymeric housing materials. Long term environmental testing has verified the lifetime performance advantage that silicone rubber provides. Independent laboratory tests have verified the superior water repellent behavior of silicone rubber, which is responsible for the lower external power losses, higher resistance to UV degradation and surface tracking, superior performance in contaminated environments, and other important insulating properties. Also, UltraSIL ALUMINUM ELECTRODE FIBERGLASS REINFORCED EPOXY COMPOSITE MOV DISKS STAINLESS STEEL NAMEPLATE silicone rubber has been proven not to support biological growth and is non-flammable. The basic silicone rubber housed arrester can be customized with a variety of terminal and mounting options which allow users to select the features that meet their application needs. Customers who require longer creepage housings can easily select a different housing option through the catalog numbering system. See pages 8-9 for a complete list of available options. OPERATION The operation of the UltraSIL Housed Type US, UH, and UX Arrester is typical of gapless metal oxide arresters. During steady-state conditions, lineto-ground voltage is applied continuously between the line and ground terminals of the arrester. When surges occur, the arrester immediately limits, or clamps, the overvoltage condition by conducting the surge current to ground. After passage of the surge, the arrester returns to its initial state, conducting minimal leakage current. This minimal leakage current (which is primarily capacitive, with a small resistive component) can be tolerated on a continuing basis. The UltraSIL Housed Type US, UH, and UX Arresters easily surpass the minimum fault current withstand requirements for station class arresters as defined in IEEE C62.11-2004 (40 ka). These arresters have been tested and shown to withstand fault currents of 80 ka. During these tests, the silicone rubber housing ruptures without expelling internal parts. UltraSIL Housed Type US, UH, and UX Arresters are ideal for protection against repeated high energy switching surges and provide reliable protection for substation equipment, capacitor banks, multiple lines, and cable circuits. They are also ideal for applications where lighter weight and shorter heights (when compared to porcelain housed arresters) are critical. DESIGN TESTING The housing, internal components, and hardware of an arrester must work together as a system. This system must stand up to years of service while being subjected to a wide range of environmental and electrical stresses. To ensure a superior level of performance, both arrester components and finished arresters have been subjected to a series of tests that accurately represents years of exposure to actual field conditions. This testing far exceeds the requirements of industry standards. The UltraSIL Housed Arrester has also met or exceeded all requirements for station class arresters as defined by IEEE C62.11-2004. A certified test report is available upon request. For a copy, please order Cooper Power Systems document CP-9811. PRODUCTION TESTS Cooper Power Systems has implemented a complete production test program to ensure a quality product. Each MOV disk is subjected to a series of electrical tests to maintain quality. We also perform additional tests on every MOV disk batch. Listed below are the tests performed on the MOV disks: 100% Physical Inspection 100% Discharge Voltage Test 100% V ref at 6 ma 100% Watt Loss Measured at 1.05 x MCOV 100% Transmission Line Discharge Energy Test Batch High-Current, Short-Duration Test Batch Thermal Stability Test Batch Aging Test 2

235-88 Each fully assembled UltraSIL Housed Station Class Arrester also must pass the following production tests: 100% Physical Inspection 100% V ref Test 100% Watt Loss Test 100% Partial Discharge Inception Voltage Test GENERAL APPLICATION RECOMMENDATIONS The rating of an arrester is the maximum power-frequency line-to-ground voltage at which the arrester is designed to pass an operating duty-cycle test (as defined in IEEE C62.11 ). Table 2 provides a general application guide for the selection of the proper arrester rating for a given system voltage and grounding configurations as outlined in IEEE C62.22, which is the application guide for metal oxide surge arresters. Under fault conditions and other system anomalies, higher than normal voltages can be imposed upon an arrester. With an improper arrester selection, these abnormal system voltages can cause an arrester to fail. To help ensure that the proper arrester is selected, Cooper Power Systems application engineers are available to make recommendations. The following information is normally required: 1. Maximum system operating voltage. 2. System grounding conditions; A. For four-wire circuits, grounding conditions depend upon whether the system is multi-grounded, whether it has a neutral impedance and whether common primary and secondary neutrals are used. B. For three-wire circuits, grounding conditions depend upon whether the system is solidly grounded at the source, grounded through neutral impedance at the source transformers or ungrounded. 3. Available Fault Current. 4. Maximum line-to-ground voltage and overvoltage duration during fault conditions. Contact your Cooper representative to have your individual system application needs reviewed. TABLE 2 Recommended Arrester Applications for VariSTAR Station Class Arresters VOLTAGE PER UNIT MCOV 1.7 1.6 1.5 1.4 1.3 1.2 System Voltage Recommended Arrester Rating (MCOV) () Three-Wire or Four-Wire Wye Delta and Solidly Grounded Ungrounded Nominal Maximum Neutral Wye 2.4 2.52 3 (2.55) 3 (2.55) 4.16 4.37 3 (2.55) 6 (5.10) 4.8 5.04 6 (5.10) 6.9 7.25 6 (5.10) 9 (7.65) 8.32 8.74 6 (5.10) 9 (7.65) 10 (8.40) 12.0 12.6 9 (7.65) 12 (10.2) 10 (8.40) 15 (12.7) 12.47 13.1 9 (7.65) 15 (12.7) 10 (8.40) 18 (15.3) 13.2 13.9 10 (8.40) 15 (12.7) 12 (10.2) 13.8 14.5 10 (8.40) 15 (12.7) 12 (10.2) 18 (15.3) 20.78 21.8 15 (12.7) 24 (19.5) 21 (17.0) 27 (22.0) 22.86 24.0 18 (15.3) 24 (19.5) 21 (17.0) 27 (22.0) 24.9 26.2 18 (15.3) 24 (19.5) 21 (17.0) 27 (22.0) 34.5 36.2 27 (22.0) 36 (29.0) 30 (24.4) 39 (31.5) 46.0 48.3 36 (29.0) 48 (39.0) 39 (31.5) 69.0 72.5 54 (42.0) 72 (57.0) 60 (48.0) 115 121 90 (70.0) 108 (84.0) 96 (76.0) 138 145 108 (84.0) 132 (106) 120 (98.0) 144 (115) 120 (98.0) 144 (115) 161 169 132 (106) 168 (131) 144 (115) 172 (140) 228 (180) 230 242 180 (144) 240 (190) 192 (152) PRIOR DUTY NO PRIOR DUTY 60 C AMBIENT TEMPERATURE 1.1 0.01 0.1 1 10 100 1000 10000 MAXIMUM TIME DURATION IN SECONDS Figure 3. Temporary overvoltage curve 60 ambient temperature. 3

UltraSIL Housed VariSTAR Station Class Surge Arresters TEMPORARY OVERVOLTAGE (TOV) WITHSTAND ABILITY The UltraSIL Housed Type US, UH, and UX Arresters ability to withstand 60 Hz overvoltage conditions (TOVs) is shown in Figure 3. The graph illustrates the time an arrester can survive a voltage, and recover, without going into thermal runaway, for a given voltage magnitude (expressed in Per Unit of arrester MCOV). The graphs in Figure 3 illustrate TOV withstand ability, with and without prior duty. The prior duty curve is based upon absorption of rated energy (Refer to Table 1 Single Impulse Rating) immediately preceding application of the overvoltage. MOUNTING INFORMATION The standard base of the UltraSIL Housed Type US, UH, and UX Arresters is designed for mounting on 8.75" or 10" diameter bolt circle patterns. The three slotted mounting holes are spaced 120 from each other and are designed to handle 0.5" diameter bolts. Mounting hardware (bolts, nuts, and washers) is not included with the arrester. See Figure 4 for mounting base details. An inherently strong design allows these arresters to be mounted in a variety of ways. They can be mounted vertically, with attachment at the base, or suspension (underhung) mounted. In order to underhang the arrester the proper orientation of the mounting base is required. UltraSIL Housed Station Arresters can also be horizontally mounted through 120 kv. Please select the proper mounting arrangement option in the catalog number as shown in Table 7, (on Page 8) digit 13. THICKNESS OF MOUNTING FEET IS 1.25" Figure 4. Mounting base details. 120 TYPICAL (3) 0.56" x 1.18" MOUNTING SLOTS 8.75" 10.00" DIA. BOLT CIRCLE B B C C B Figure 5. Three-phase In-line mounting arrangement. SPACING REQUIREMENTS Figure 5 illustrates a three-phase in-line mounting arrangement. Dimensions B and C reference minimum phase-toground and phase-to-phase distances respectively. These dimensions are listed in Table 8 on Page 10. NAMEPLATE INFORMATION A stainless steel nameplate is attached to the base of every UltraSIL Housed Type US, UH, and UX Arrester. The arrester catalog number, serial number, year of manufacture, duty-cycle rating, MCOV ratings, and pressure relief rating are among the details provided on the nameplate. For multi-unit arresters above 120 kv, an additional OLEAN, N.Y. USA VariSTAR SURGE ARRESTER Cat. No. Ser. No. Year Rating/Ur MCOV/Uc rms Pres. Relief ka sym. Class Cert. Frequency Alt. 0-12000 Ft. 50-60 Hz 0-3600 M Figure 6. Detail of base nameplate. OLEAN, N.Y. USA VariSTAR SURGE ARRESTER Cat. No. Ser. No. Unit F MCOV/Uc Unit E MCOV/Uc Unit D MCOV/Uc Unit C MCOV/Uc Unit B MCOV/Uc Unit A MCOV/Uc Figure 7. Detail of unit nameplate on base. nameplate is provided on the base as shown in Figure 7. See Figure 6 for an example of a blank nameplate. TABLE 3 Catalog Numbers for Standard Configuration Type US, UH and UX Surge Arresters Arrester Rating Type US Type UH Type UX (kv, rms) 3 US003A UH003A UX003A 6 US006A UH006A UX006A 9 US009A UH009A UX009A 10 US010A UH010A UX010A 12 US012A UH012A UX012A 15 US015A UH015A UX015A 18 US018A UH018A UX018A 21 US021A UH021A UX021A 24 US024A UH024A UX024A 27 US027A UH027A UX027A 30 US030A UH030A UX030A 33 US033A UH033A UX033A 36 US036A UH036A UX036A 39 US039A UH039A UX039A 42 US042A UH042A UX042A 45 US045A UH045A UX045A 48 US048A UH048A UX048A 54 US054A UH054A UX054A 60 US060A UH060A UX060A 66 US066A UH066A UX066A 72 US072A UH072A UX072A 78 US078A UH078A UX078A 84 US084A UH084A UX084A 90 US090A UH090A UX090A 96 US096A UH096A UX096A 108 US108A UH108A UX108A 120 US120A UH120A 132 US132A UH132A 138 US138A UH138A 144 US144A UH144A 162 US162A UH162A 168 US168A UH168A 172 US172A UH172A 180 US180A UH180A 192 US192A UH192A 198 US198A UH198A 204 US204A UH204A 216 US216A UH216A 228 US228A UH228A 240 US240A UH240A 4

235-88 TABLE 4 Protective Characteristics of the UltraSIL Housed Station Class Arrester Type US Front-of-wave Maximum Discharge Voltage (kv crest) Switching Surge Arrester Arrester TOV* Protective 8/20 µs Current Wave Protective Level*** Rating MCOV () Level** (kv crest) () () 1 sec 10 sec (kv Crest) 1.5 ka 3 ka 5 ka 10 ka 20 ka 40 ka 125 A 250 A 500 A 1000 A 3 2.55 3.73 3.56 9.3 7.0 7.4 7.7 8.4 9.4 11.0 6.1 6.3 6.5 6.7 6 5.10 7.47 7.11 18.2 13.9 14.7 15.4 16.7 18.6 21.4 12.2 12.6 13.0 13.5 9 7.65 11.2 10.7 27.2 20.9 22.0 23.1 25.0 27.7 31.7 18.3 18.9 19.5 20.2 10 8.40 12.3 11.7 29.7 23.0 24.2 25.4 27.4 30.4 34.8 20.1 20.7 21.4 22.2 12 10.2 14.9 14.2 36.0 27.9 29.4 30.8 33.3 36.9 42.1 24.4 25.2 26.0 26.9 15 12.7 18.6 17.7 44.7 34.7 36.6 38.3 41.4 45.9 52.2 30.4 31.3 32.4 33.5 18 15.3 22.4 21.3 53.7 41.8 44.0 46.2 49.8 55.2 62.8 36.6 37.7 39.0 40.4 21 17.0 24.9 23.7 59.7 46.4 48.9 51.3 55.4 61.3 69.7 40.7 41.9 43.4 44.9 24 19.5 28.6 27.2 68.4 53.3 56.1 58.8 63.5 70.3 79.9 46.7 48.1 49.8 51.5 27 22.0 32.2 30.7 77.0 60.1 63.3 66.3 71.6 79.3 90.0 52.7 54.3 56.1 58.1 30 24.4 35.7 34.0 85.4 66.6 70.2 73.6 79.4 87.9 99.8 58.4 60.2 62.3 64.4 33 27.5 40.3 38.4 96.2 75.1 79.1 82.9 89.5 99.1 112 65.9 67.8 70.2 72.6 36 29.0 42.5 40.5 101 79.2 83.4 87.4 94.4 105 119 69.5 71.5 74.0 76.6 39 31.5 46.1 43.9 111 86.0 90.6 95.0 103 113 129 75.4 77.7 80.4 83.1 42 34.0 49.8 47.4 119 92.8 97.8 103 111 122 139 81.4 83.9 86.8 89.7 45 36.5 53.4 50.9 128 99.7 105 110 119 131 149 87.4 90.0 93.1 96.3 48 39.0 57.1 54.4 136 107 112 118 127 140 159 93.4 96.2 99.5 103 54 42.0 61.5 58.6 147 115 121 127 137 151 171 101 104 107 111 60 48.0 70.3 67.0 167 131 138 145 156 173 196 115 118 123 127 66 53.0 77.6 73.9 186 145 153 160 173 191 217 127 131 135 140 72 57.0 83.5 79.5 200 156 164 172 186 205 233 137 141 145 151 78 62.0 90.8 86.5 217 169 178 187 202 223 253 149 153 158 164 84 68.0 99.6 94.9 237 186 196 205 221 245 278 163 168 174 179 90 70.0 102.5 97.7 245 191 201 211 228 252 286 168 173 179 185 96 76.0 111.3 106.0 265 208 219 229 247 274 310 182 188 194 201 108 84.0 123.0 117.2 293 229 242 253 273 302 343 201 207 214 222 120 98.0 143.5 136.7 321 255 269 279 298 328 366 226 232 238 247 132 106 155.2 147.9 349 276 290 302 323 355 396 244 250 258 267 138 111 162.5 154.9 365 289 304 316 338 372 415 256 262 270 280 144 115 168.4 160.4 378 300 315 327 350 385 430 265 272 279 290 162 130 190.3 181.4 427 339 356 370 396 435 486 300 307 316 327 168 131 191.8 182.8 430 341 359 373 399 438 489 302 309 318 330 172 140 205.0 195.3 459 365 384 398 426 468 523 323 331 340 352 180 144 210.8 200.9 472 375 395 410 438 482 538 332 340 350 362 192 152 222.5 212.0 499 396 417 432 463 509 568 350 359 369 383 198 160 234.2 223.2 525 417 439 455 487 536 598 369 378 389 403 204 165 241.6 230.2 541 430 452 469 502 552 617 380 390 401 415 216 174 254.7 242.7 570 453 477 495 529 582 650 401 411 423 438 228 180 263.5 251.1 591 469 493 512 548 602 672 415 425 437 453 240 190 278.2 265.1 623 495 521 540 578 636 709 438 449 462 478 * Temporary overvoltage with prior duty energy surge. ** Based on a 10 ka current impulse that results in a discharge voltage cresting in 0.5 µs. *** 45-60 µs rise time current surge. ORDERING INFORMATION Table 3 includes the standard catalog numbers for UltraSIL Housed Type US, UH, and UX Arresters. The arrester represented by the standard catalog number is configured with the connectors and mounting arrangement shown in Figure 8, Page 11. The standard catalog numbers shown in Table 3 represent the same catalog numbers shown in Table 7, if the standard housing code is used in digits 9 and 10, and if 45 are used in digits 11 and 12. For example, catalog number US060A from Table 3 represents the same catalog number US0600483045A11 from Table 7. Cooper Power Systems offers other options that allow customers to select specific features they desire. Options on housing sizes (creepage length), hardware, and mounting options are available and defined in Table 7. This table allows customers who prefer options different from those in our standard Figure 8 configuration to develop a catalog number which provides the unique features they desire. For additional assistance please contact your Cooper Power Systems sales representative. PROTECTIVE CHARACTERISTICS All UltraSIL Housed Type US, UH, and UX Arresters provide excellent overvoltage protection for electrical equipment. The specific protective characteristics for each arrester rating are shown in Table 4 for US arresters, Table 5 for UH arresters and Table 6 for UX Arresters. These tables are on Pages 5, 6 and 7. 5

UltraSIL Housed VariSTAR Station Class Surge Arresters TABLE 5 Protective Characteristics of the UltraSIL Housed Station Class Arrester Type UH Front-of-wave Maximum Discharge Voltage (kv crest) Switching Surge Arrester Arrester TOV* Protective 8/20 µs Current Wave Protective Level*** Rating MCOV () Level** (kv crest) () () 1 sec 10 sec (kv Crest) 1.5 ka 3 ka 5 ka 10 ka 20 ka 40 ka 125 A 250 A 500 A 1000 A 3 2.55 3.73 3.56 8.8 6.7 7.0 7.3 7.9 8.8 10.1 5.9 6.0 6.2 6.4 6 5.10 7.47 7.11 17.1 13.3 14.0 14.6 15.6 17.3 19.6 11.7 12.0 12.4 12.9 9 7.65 11.2 10.7 25.5 19.9 21.0 21.8 23.4 25.8 29.1 17.6 18.1 18.6 19.3 10 8.40 12.3 11.7 28.0 21.9 23.0 23.9 25.7 28.3 31.9 19.4 19.8 20.4 21.2 12 10.2 14.9 14.2 33.7 26.6 28.0 29.0 31.1 34.3 38.6 23.5 24.1 24.8 25.7 15 12.7 18.6 17.7 41.9 33.1 34.8 36.2 38.7 42.7 47.9 29.3 30.0 30.9 32.0 18 15.3 22.4 21.3 50.4 39.9 41.9 43.5 46.6 51.4 57.6 35.3 36.1 37.2 38.5 21 17.0 24.9 23.7 56.0 44.3 46.6 48.4 51.8 57.0 63.9 39.2 40.2 41.3 42.8 24 19.5 28.6 27.2 64.2 50.8 53.5 55.5 59.4 65.4 73.2 44.9 46.1 47.4 49.1 27 22.0 32.2 30.7 72.4 57.3 60.3 62.6 67.0 73.7 82.5 50.7 52.0 53.4 55.4 30 24.4 35.7 34.0 80.3 63.6 66.9 69.4 74.3 81.8 91.4 56.2 57.6 59.3 61.4 33 27.5 40.3 38.4 90.3 71.7 75.4 78.2 83.7 92.1 103 63.4 65.0 66.8 69.2 36 29.0 42.5 40.5 95.3 75.6 79.5 82.5 88.3 97.1 109 66.8 68.5 70.4 73.0 39 31.5 46.1 43.9 104 82.1 86.3 89.6 95.9 106 118 72.6 74.4 76.5 79.3 42 34.0 49.8 47.4 112 88.6 93.2 96.7 104 114 127 78.3 80.3 82.6 85.6 45 36.5 53.4 50.9 120 95.1 100 104 111 122 137 84.1 86.2 88.7 91.9 48 39.0 57.1 54.4 128 102 107 111 119 131 146 89.9 92.1 94.7 98.2 54 42.0 61.5 58.6 138 109 115 119 128 141 157 96.8 99.2 102 106 60 48.0 70.3 67.0 157 125 132 137 146 161 179 111 113 117 121 66 53.0 77.6 73.9 174 138 145 151 161 178 199 122 125 129 133 72 57.0 83.5 79.5 188 149 156 162 174 191 213 131 135 138 144 78 62.0 90.8 86.5 204 162 170 176 189 208 232 143 147 151 156 84 68.0 99.6 94.9 223 177 186 193 207 228 254 157 161 165 171 90 70.0 102.5 97.7 230 182 192 199 213 234 262 161 165 170 176 96 76.0 111.3 106.0 249 198 208 216 231 254 284 175 180 185 191 108 84.0 123.0 117.2 276 219 230 239 256 281 314 194 198 204 211 120 98.0 143.5 136.7 310 249 260 269 286 314 350 222 227 233 242 132 106 155.2 147.9 337 269 281 291 310 340 380 240 246 252 261 138 111 162.5 154.9 353 282 294 305 325 356 398 252 257 264 274 144 115 168.4 160.4 365 292 305 316 336 368 412 261 267 274 284 162 130 190.3 181.4 413 330 345 357 380 416 465 295 301 310 320 168 131 191.8 182.8 416 333 347 360 383 420 469 297 304 312 323 172 140 205.0 195.3 444 356 371 384 409 448 501 317 325 333 345 180 144 210.8 200.9 457 366 382 395 421 461 515 326 334 343 355 192 152 222.5 212.0 482 386 403 417 444 487 544 344 352 362 375 198 160 234.2 223.2 508 407 424 439 468 512 573 363 371 381 395 204 165 241.6 230.2 524 419 438 453 482 528 591 374 383 393 407 216 174 254.7 242.7 553 442 462 478 509 557 623 394 404 414 429 228 180 263.5 251.1 571 457 477 494 526 576 644 408 417 429 444 240 190 278.2 265.1 603 483 504 522 555 608 680 431 441 452 468 * Temporary overvoltage with prior duty energy surge. ** Based on a 10 ka current impulse that results in a discharge voltage cresting in 0.5 µs. *** 45-60 µs rise time current surge. 6

235-88 TABLE 6 Protective Characteristics of the UltraSIL Housed Station Class Arrester Type UX Front-of-wave Maximum Discharge Voltage (kv crest) Switching Surge Arrester Arrester TOV* Protective 8/20 µs Current Wave Protective Level*** Rating MCOV () Level** (kv crest) () () 1 sec 10 sec (kv Crest) 1.5 ka 3 ka 5 ka 10 ka 20 ka 40 ka 125 A 250 A 500 A 1000 A 3 2.55 3.73 3.56 8.5 6.5 6.8 7.0 7.6 8.4 9.8 5.8 5.9 6.1 6.3 6 5.10 7.47 7.11 16.5 13.0 13.6 14.0 15.0 16.5 18.8 11.6 11.8 12.2 12.6 9 7.65 11.2 10.7 24.6 19.4 20.3 21.0 22.5 24.7 27.9 17.3 17.7 18.2 18.9 10 8.40 12.3 11.7 26.9 21.3 22.3 23.1 24.6 27.1 30.6 19.0 19.5 20.0 20.7 12 10.2 14.9 14.2 32.6 25.9 27.1 28.0 29.9 32.8 37.0 23.1 23.6 24.3 25.2 15 12.7 18.6 17.7 40.6 32.3 33.7 34.9 37.2 40.8 45.9 28.8 29.4 30.3 31.3 18 15.3 22.4 21.3 48.8 38.9 40.6 42.0 44.8 49.1 55.2 34.7 35.5 36.4 37.7 21 17.0 24.9 23.7 54.2 43.2 45.1 46.7 49.8 54.6 61.2 38.5 39.4 40.5 41.9 24 19.5 28.6 27.2 62.2 49.6 51.7 53.6 57.1 62.6 70.1 44.2 45.2 46.4 48.1 27 22.0 32.2 30.7 70.0 55.9 58.4 60.4 64.4 70.6 79.1 49.9 51.0 52.4 54.3 30 24.4 35.7 34.0 77.7 62.0 64.7 67.0 71.4 78.2 87.6 55.3 56.6 58.1 60.2 33 27.5 40.3 38.4 87.4 69.9 72.9 75.5 80.4 88.1 98.6 62.3 63.8 65.5 67.8 36 29.0 42.5 40.5 92.2 73.7 76.9 79.6 84.8 92.9 104 65.7 67.2 69.0 71.5 39 31.5 46.1 43.9 100 80.0 83.6 86.5 92.1 101 113 71.4 73.0 75.0 77.7 42 34.0 49.8 47.4 108 86.4 90.2 93.4 99.4 109 122 77.0 78.8 80.9 83.8 45 36.5 53.4 50.9 116 92.7 96.8 100 107 117 131 82.7 84.6 86.9 90.0 48 39.0 57.1 54.4 124 99.1 103 107 114 125 140 88.4 90.4 92.8 96.2 54 42.0 61.5 58.6 134 107 111 115 123 135 150 95.2 97.4 100 104 60 48.0 70.3 67.0 152 122 127 132 140 154 172 109 111 114 118 66 53.0 77.6 73.9 161 133 138 140 148 158 174 140 122 125 129 72 57.0 83.5 79.5 173 143 149 151 159 170 186 152 131 134 138 78 62.0 90.8 86.5 188 155 162 164 173 185 202 165 142 146 150 84 68.0 99.6 94.9 207 170 177 180 190 202 221 182 156 160 165 90 70.0 102.5 97.7 212 175 182 185 195 208 228 187 160 164 170 96 76.0 111.3 106.0 230 190 198 201 212 227 248 202 174 179 184 108 84.0 123.0 117.2 254 210 219 222 234 250 273 225 193 197 204 * Temporary overvoltage with prior duty energy surge. ** Based on a 10 ka current impulse that results in a discharge voltage cresting in 0.5 µs. *** 45-60 µs rise time current surge. 7

UltraSIL Housed VariSTAR Station Class Surge Arresters TABLE 7 UltraQUIK Catalog Numbering System for UltraSIL Housed Station Class Arresters 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 U 1 1 Catalog Number Digits: 1 = U (UltraSIL Housed Arrester) { S = Standard Energy Handling (3.4 kj/kv MCOV) 2 = H = High Energy Handling (5.6 kj/kv MCOV) X = Xtra-High Energy Handling (8.9 kj/kv MCOV) 3 through 8 = Arrester Rating: Duty-cycle (MCOV) 003002 = 3 kv (2.55 kv) 9 and 10 = Housing Code (Select from Table below): 006005 = 6 kv (5.1 kv) 009007 = 9 kv (7.65 kv) Optional Housing 010008 = 10 kv (8.4 kv) Arrester Standard Housing Codes* Rating Code (Extra Creepage) 012010 = 12 kv (10.2 kv) 015012 = 15 kv (12.7 kv) 018015 = 18 kv (15.3 kv) 3 6 08 10 12 021017 = 21 kv (17.0 kv) 9 10 12, 14 024019 = 24 kv (19.5 kv) 10 10 12, 14 027022 = 27 kv (22.0 kv) 12 12 14 or 16 030024 = 30 kv (24.4 kv) 15 14 16, 18 or 20 033027 = 33 kv (27.0 kv) 036029 = 36 kv (29.0 kv) 18 14 16, 18 or 20 039031 = 39 kv (31.5 kv) 21 16 18, 20 or 22 042034 = 42 kv (34.0 kv) 24 18 20, 22 or 24 045036 = 45 kv (36.5 kv) 27 18 20, 22 or 24 048039 = 48 kv (39.0 kv) 30 20 22, 24 or 26 054042 = 54 kv (42.0 kv) 33 22 24 or 26 060048 = 60 kv (48.0 kv) 066053 = 66 kv (53.0 kv) 36 22 24, 26 or 28 072057 = 72 kv (57.0 kv) 39 22 24, 26, 28 or 30 078062 = 78 kv (62.0 kv) 42 24 26, 28 or 30 084068 = 84 kv (68.0 kv) 45 26 28 or 30 090070 = 90 kv (70.0 kv) 48 26 28 or 30 096076 = 96 kv (76.0 kv) 54 28 30 108084 = 108 kv (84.0 kv) 60 30 120098 = 120 kv (98.0 kv) 132106 = 132 kv (106 kv) 66 40 138111 = 138 kv (111 kv) 144115 = 144 kv (115 kv) 72 78 44 48 46, 48 or 50 50, 52 or 54 162130 = 162 kv (130 kv) 84 48 50, 52 or 54 168131 = 168 kv (131 kv) 90 50 52, 54 or 56 172140 = 172 kv (140 kv) 96 52 54, 56 or 58 180144 = 180 kv (144 kv) 108 58 60 192152 = 192 kv (152 kv) 198160 = 198 kv (160 kv) 120 60 204165 = 204 kv (165 kv) 132 76 78, 80 or 82 216174 = 216 kv (174 kv) 138 78 80, 82 or 84 228180 = 228 kv (180 kv) 144 78 80, 82 or 84 240190 = 240 kv (190 kv) 162 86 88 or 90 168 86 88 or 90 172 88 90 180 90 192 A4 A6, A8 or B0 198 A8 B0, B2 or B4 204 B0 B2, B4 or B6 216 B4 B6, B8 or C0 228 B6 B8 or C0 240 C0 * Consult factory for additional housing codes, if required. Creepage Distance (in.) Housing Code US UH UX 08 16.2 17.1 17.0 10 20.3 21.4 21.3 12 24.3 25.6 25.5 14 28.4 29.9 29.8 16 32.4 34.2 34.0 18 36.5 38.4 38.3 20 40.5 42.7 42.5 22 44.6 47.0 46.8 24 48.6 51.2 51.0 26 52.7 55.5 55.3 28 56.7 59.8 59.5 30 60.8 64.1 63.8 32 64.8 68.3 68.0 34 68.9 72.6 72.3 36 72.9 76.9 76.5 38 77.0 81.1 80.8 40 81.0 85.4 85.0 42 85.1 89.7 89.3 44 89.1 93.9 93.5 46 93.2 98.2 97.8 48 97.2 102.5 102.1 50 101.3 106.8 106.3 52 105.3 111.0 110.6 54 109.4 115.3 114.8 56 113.4 119.6 119.1 58 117.5 123.8 123.3 60 128.1 127.6 62 132.4 131.8 64 136.6 136.1 66 140.9 140.3 68 145.2 144.6 70 149.5 148.8 72 153.7 153.1 74 158.0 157.3 76 162.3 161.6 78 166.5 165.8 80 170.8 170.1 82 175.1 174.3 84 179.3 178.6 86 183.6 182.8 88 187.9 187.1 90 192.2 191.3 92 196.4 195.6 94 200.7 199.8 96 205.0 204.1 98 209.2 208.4 A0 213.5 212.6 A2 217.8 216.9 A4 222.0 221.1 A6 226.3 225.4 A8 230.6 229.6 B0 234.9 233.9 B2 239.1 238.1 B4 243.4 242.4 B6 247.7 246.6 B8 251.9 250.9 C0 256.2 255.1 8

235-88 11 = Line Terminal Options 4.72 " (120 mm) 4.72" (120 mm) 1 = Eyebolt Connector 4 = NEMA Four-hole Pad Accepts copper or aluminum Accepts copper or aluminum conductors conductors from.16" dia. (#6) to from.16" dia. (#6) to 1.15" dia. (1000 MCM).575" dia. (250 MCM) (Standard Option) 12 = Ground Terminal Options 2.5" (6.4 mm) 3.6" (91 mm) 2.0" (51 mm) 2.5" (6.4 mm) 1 = Clamp Style Connector 5 = NEMA Four-hole Pad 9 = Eyebolt Connector Accepts copper or aluminum Accepts copper or aluminum conductors Accepts copper or aluminum conductors conductors from.16" dia. from.16" dia. (#6) to.82" dia. (500 MCM) from.16" dia. (#6) to (#6) to.575" dia. (250 MCM) (Standard Option).575" dia (250 MCM) 13 = Mounting Arrangement A = Mounting Base Located on Bottom (Standard Option) C = Mounting Base Located on Top (Suspension Mount) 14 = 1 15 = 1 9

UltraSIL Housed VariSTAR Station Class Surge Arresters TABLE 8 Creepage Distances and Insulation Withstand Voltages of UltraSIL Housed Station Class Arresters Insulation Withstand Voltages Creepage 1.2/50 Switching 60 Hz, dry 60 Hz wet Arrester Arrester Distances Impulse Surge Impulse 60 seconds 10 seconds Rating MCOV (inches) (kv, crest) (kv, crest) (kv, rms) (kv, rms) (kv, rms) (kv, rms) US UH UX US, UH or UX US or UH US, UH or UX US, UH or UX 3 2.55 16.2 17.1 17.0 130 N/A 86 59 6 5.10 20.3 21.4 21.3 149 N/A 102 68 9 7.65 20.3 21.4 21.3 149 N/A 102 68 10 8.40 20.3 21.4 21.3 149 N/A 102 68 12 10.2 24.3 25.6 25.5 171 N/A 115 81 15 12.7 28.4 29.9 29.8 193 N/A 126 93 18 15.3 28.4 29.9 29.8 193 N/A 126 93 21 17.0 32.4 34.2 34.0 214 N/A 136 105 24 19.5 36.5 38.4 38.3 236 N/A 144 117 27 22.0 36.5 38.4 38.3 236 N/A 144 117 30 24.4 40.5 42.7 42.5 255 N/A 151 124 33 27.5 44.6 47.0 46.8 279 N/A 158 142 36 29.0 44.6 47.0 46.8 279 N/A 158 142 39 31.5 44.6 47.0 46.8 279 N/A 158 142 42 34.0 48.6 51.2 51.0 301 N/A 165 154 45 36.5 52.7 55.5 55.3 322 N/A 173 166 48 39.0 52.7 55.5 55.3 322 N/A 173 166 54 42.0 56.7 59.8 59.5 344 N/A 182 178 60 48.0 60.8 64.0 63.8 366 N/A 192 190 66 53.0 81.0 85.4 85.0 510 N/A 302 248 72 57.0 89.1 93.9 93.5 558 N/A 316 284 78 62.0 97.2 102.5 102.1 602 N/A 330 308 84 68.0 97.2 102.5 102.1 602 N/A 330 308 90 70.0 101.3 106.8 106.3 623 N/A 338 320 96 76.0 105.3 111.0 110.6 644 N/A 346 332 108 84.0 117.5 123.8 123.3 710 N/A 374 368 120 98.0 128.1 127.6 732 N/A 384 380 132 106 162.3 161.6 863 N/A 507 455 138 111 166.5 165.8 890 N/A 517 467 144 115 166.5 165.8 890 N/A 517 467 162 130 183.6 182.8 979 N/A 559 513 168 131 183.6 182.8 979 N/A 559 513 172 140 187.9 187.1 1001 N/A 569 525 180 144 192.2 191.3 1029 960 586 533 192 152 222.0 221.1 1212 1166 690 633 198 160 230.6 229.6 1256 1208 708 657 204 165 234.8 233.9 1278 1229 717 669 216 174 243.4 242.4 1323 1265 741 691 228 180 247.7 246.6 1345 1286 751 703 240 190 256.2 255.1 1395 1314 778 723 10

235-88 TABLE 9 Dimensions, Clearance Requirements, and Weights of UltraSIL Housed Station Class Arresters (Standard Configuration) Figure 5, Figure 5, Figure 8 Dim. B Min. Dim. C Min. Figure 8 Arrester Arrester Dim. A Phase-Ground Phase-Phase Dim. D Weight Rating MCOV (inches) Clearance (inches)* Clearance (inches)* (inches) (lbs.) (kv, rms) (kv, rms) US or UH UX US UH UX US UH UX US UH UX US UH UX 3 2.55 8.4 8.4 5.2 5.2 5.2 9.7 9.7 9.7 4.16 4.78 5.29 12.2 14.0 15.9 6 5.10 9.9 9.9 5.4 5.3 5.3 9.9 9.8 9.8 4.16 4.78 5.29 13.3 15.6 18.3 9 7.65 9.9 9.9 5.8 5.7 5.6 10.3 10.2 10.1 4.16 4.78 5.29 13.6 16.2 19.1 10 8.40 9.9 9.9 6.0 5.8 5.8 10.5 10.3 10.3 4.16 4.78 5.29 13.6 16.2 19.1 12 10.2 11.4 11.4 6.5 6.3 6.2 11.0 10.8 10.7 4.16 4.78 5.29 14.7 17.8 21.4 15 12.7 13.0 13.0 7.3 7.0 6.9 11.8 11.5 11.4 4.16 4.78 5.29 15.7 19.4 23.7 18 15.3 13.0 13.0 8.3 7.9 7.7 12.8 12.4 12.2 4.16 4.78 5.29 16.0 19.9 24.5 21 17.0 14.5 14.5 9.0 8.6 8.3 13.5 13.1 12.8 4.16 4.78 5.29 16.8 21.0 26.0 24 19.5 16.0 16.0 9.2 8.7 8.4 13.7 13.2 12.9 4.16 4.78 5.29 17.9 22.7 28.4 27 22.0 16.0 16.0 10.1 9.6 9.3 14.6 14.1 13.8 4.16 4.78 5.29 18.1 23.2 29.2 30 24.4 17.6 17.6 11.0 10.4 10.1 15.5 14.9 14.6 4.16 4.78 5.29 19.2 24.8 31.5 33 27.5 19.1 19.1 12.2 11.5 11.2 16.7 16.0 15.7 4.16 4.78 5.29 20.3 26.5 33.9 36 29.0 19.1 19.1 12.8 12.1 11.7 17.3 16.6 16.2 4.16 4.78 5.29 20.3 26.5 33.9 39 31.5 19.1 19.1 13.8 12.9 12.5 18.3 17.4 17.0 4.16 4.78 5.29 20.6 27.0 34.6 42 34.0 20.6 20.6 14.7 13.9 13.4 19.2 18.4 17.9 4.16 4.78 5.29 21.6 28.6 36.9 45 36.5 22.2 22.2 15.6 14.7 14.2 20.1 19.2 18.7 4.16 4.78 5.29 22.7 30.2 39.2 48 39.0 22.2 22.2 16.6 15.6 15.1 21.1 20.1 19.6 4.16 4.78 5.29 23.0 30.8 40.1 54 42.0 23.7 23.7 17.7 16.7 16.1 22.2 21.2 20.6 4.16 4.78 5.29 24.1 32.4 42.4 60 48.0 25.3 25.3 19.9 18.8 18.1 24.4 23.3 22.6 4.16 4.78 5.29 25.4 34.6 45.5 66 53.0 36.2 36.2 21.9 20.5 19.0 26.4 25.0 23.5 4.16 4.78 5.29 34.1 47.7 63.7 72 57.0 39.3 39.3 23.4 22.0 20.3 27.9 26.5 24.8 4.16 4.78 5.29 36.0 50.6 67.7 78 62.0 42.4 42.4 25.3 23.8 21.9 29.8 28.3 26.4 4.16 4.78 5.29 38.1 54.3 72.3 84 68.0 42.4 42.4 27.5 25.8 23.9 32.0 30.3 28.4 4.16 4.78 5.29 38.6 54.8 73.8 90 70.0 43.9 43.9 28.3 26.5 24.4 32.8 31.0 28.9 4.16 4.78 5.29 40.0 56.9 75.4 96 76.0 45.5 45.5 30.5 28.6 26.4 35.0 33.1 30.9 4.16 4.78 5.29 41.1 58.6 79.3 108 84.0 50.1 50.1 33.5 31.5 29.0 38.0 36.0 33.5 4.16 4.78 5.29 44.3 63.5 86.3 120 98.0 51.6 36.4 35.0 40.9 39.5 4.78 5.29 67.2 91.0 132 106 67.2 47.8 46.3 60.8 59.3 4.78 5.29 89.2 120 138 111 68.7 49.5 48.0 62.5 61.0 4.78 5.29 91.4 123 144 115 68.7 50.9 49.3 63.9 62.3 4.78 5.29 91.9 124 162 130 74.9 56.3 54.4 69.3 67.4 4.78 5.29 99.0 134 168 131 74.9 56.6 54.8 69.6 67.8 4.78 5.29 99.5 135 172 140 76.4 59.8 57.8 72.8 70.8 4.78 5.29 102 139 180 144 77.9 61.1 59.2 74.1 72.2 4.78 5.29 104 142 192 152 92.0 64.0 61.8 77.0 74.8 4.78 5.29 120 164 198 160 95.1 66.8 64.6 79.8 77.6 4.78 5.29 124 169 204 165 96.6 68.6 66.2 81.6 79.2 4.78 5.29 126 172 216 174 99.7 71.7 69.4 84.7 82.4 4.78 5.29 129 178 228 180 101.2 73.9 71.3 86.9 84.3 4.78 5.29 132 181 240 190 104.3 77.4 74.7 90.4 87.7 4.78 5.29 136 187 * Phase-to-Ground clearances are expressed as minimum arrester centerline-to-ground distances. Phase-to-Phase clearances are expressed as minimum arrester centerline-to-centerline distances. 11

UltraSIL Housed VariSTAR Station Class Surge Arresters.37" (9.3 mm) 4.72" (120 mm).37" (9.3 mm) 4.72" (120 mm) 11.37" (289 mm) 11.37" (289 mm) 4.72" (120 mm) Dia. 26" (660 mm) Dia. 26" (660 mm) A 4.72" (120 mm) A A A Dia. D Dia. D Dia. D Dia. D 1.25" (32 mm) ARRESTER RATING 3-60 kv 1.25" (32 mm) 66-120 kv 1.25" (32 mm) 132-180 kv 1.25" (32 mm) 192-240 kv Figure 8. Outline drawing of standard UltraSIL Housed Station Class Arresters (for standard catalog numbers see Table 3). ADDITIONAL INFORMATION S235-88-1 UltraSIL Housed VariSTAR Station Class Surge Arrester Installation and Maintenance Instructions. CP-9811 UltraSIL Housed VariSTAR Type US, UH and UX Station Class Surge Arresters Certified Test Report. Cooper Power Systems ISO 9001: 2000 Cert. #003945 ISO 9001:2000 Olean, N.Y. 2004 Cooper Industries, Inc. VariSTAR is a registered trademark of Cooper Industries, Inc. UltraSIL is a trademark of Cooper Industries, Inc. IEEE Standard C62.11-2004 and IEEE Standard C62.22 are trademarks of the Institute of Electrical and Electronics Engineers, Inc. 1045 Hickory Street Pewaukee, WI 53072 www.cooperpower.com 12 MI 2/04