CA01082E_Catalog 30

Products – High Strength Polymer Housed Surge Arresters – SVNH & SVNX

SVNH arresters are available for use on system voltages from 161 to 500 kV. These arresters offer a high strength alternative to the SVN arresters, without sacrificing protective capability or energy handling capability.

SVNH Electrical Characteristics

Maximum Steep Current Impulse Residual Voltage (kV)

Temporary Overvoltage Capability (kV)

Maximum Switching Impulse Residual Voltage (kV)

Maximum Lightning Impulse Residual Voltage (kV)

Standard Arrester Catalog Number

Duty Cycle Rating (kV)

MCOV (kV)

10kA

1s

10s

1.5kA 3kA 5kA 10kA 20kA 40kA

SVNH144GA115 SVNH168GA131 SVNH172GA140 SVNH180GA144 SVNH192GA152 SVNH240GA190 SVNH258GA209 SVNH264GA212 SVNH276GA220 SVNH288GA230 SVNH294GA235 SVNH312GA245 SVNH396GA318 SVNH420GA335 SVNH444GA353

144 168 172 180 192 240 258 264 276 288 294 312 396 420 444

115 131 140 144 152 190 209 212 220 230 235 245 318 335 353

386 440 470 484 511 638 702 712 739 772 789 823

274 312 334 343 362 453 498 506 525 548 560 584 758 799 842

170 194 207 213 225 281 309 313 325 340 347 362 470 495 522

163 186 199 204 216 269 296 301 312 326 333 347 451 475 501

296 307 318 334 356 392 338 350 362 380 406 446 361 374 387 406 433 477 371 384 398 418 446 490 392 406 420 441 471 518 490 507 525 551 588 647 539 558 577 606 647 712 546 566 586 615 656 722 567 587 608 638 681 749 593 614 635 667 712 783 606 627 649 682 727 800 632 654 677 711 758 834 820 849 878 923 984 1083 864 894 925 972 1037 1141 910 942 975 1024 1093 1202

1068 1125 1185

The SVNX arresters are lightweight and are more resistant to fragmenting than traditional porcelain arresters. SVNX arresters are typically applied to system voltages higher than 500 kV where the energy requirements are higher than required for lower voltage systems.

SVNX Electrical Characteristics

Maximum Steep Current Impulse Residual Voltage (kV)

Maximum Switching Impulse Residual Voltage (kV)

Temporary Overvoltage Capability (kV)

Maximum Lightning Impulse Residual Voltage (kV)

Standard Arrester Catalog Number

Duty Cycle Rating (kV)

MCOV (kV)

20kA

2kA

1s

10s 1.5kA 3kA 5kA 10kA 20kA 40kA

SVNX396GA318AA SVNX420GA335AA SVNX444GA353AA SVNX588GA470AA

396 420 444 588

318 335 353 470

970

774 815 859

462 442 768 795 820 859 911 975 487 466 809 837 863 905 959 1027 513 491 853 882 910 954 1011 1082 683 654 1135 1175 1211 1270 1346 1441

1022 1077 1434

1144

Page 33 | October 2023