CA01082E_Catalog 30

Products – Porcelain Housed Surge Arresters – MH4

MH4 Electrical Characteristics

Temporary Overvoltage Capability (kVrms)

Maximum Steep Current Impulse Residual Voltage (kV)

Maximum Switching Impulse Residual Voltage (kV)

Maximum Lightning Impulse Residual Voltage (kV)

Base Arrester Catalog Number

Um (kV)

Ur (kV)

Uc (kV)

1s

10s 137 149 168 174 186 199 205 224 236 224 236 248 267 273 267 273 286 298 342 348 373 385 391 404 410 435 435 460

20kA

0.5kA 1kA 2kA 5kA 10kA 20kA 40kA

MH4170wx132yz 170 132 105.6 146 MH4170wx144yz 170 144 115.2 159 MH4170wx162yz 170 162 129.6 179 MH4170wx168yz 170 168 134.4 186 MH4245wx180yz 245 180 144 199 MH4245wx192yz 245 192 153.6 212 MH4245wx198yz 245 198 158.4 219 MH4245wx216yz 245 216 172.8 239 MH4245wx228yz 245 228 182.4 252 MH4300wx216yz 300 216 172.8 239 MH4300wx228yz 300 228 182.4 252 MH4300wx240yz 300 240 192 265 MH4300wx258yz 300 258 206.4 285 MH4300wx264yz 300 264 211.2 292 MH4362wx258yz 362 258 206.4 285 MH4362wx264yz 362 264 211.2 292 MH4362wx276yz 362 276 220.8 305 MH4362wx288yz 362 288 230.4 318 MH4420wx330yz 420 330 264 365 MH4420wx336yz 420 336 268.8 371 MH4420wx360yz 420 360 288 398 MH4420wx372yz 420 372 297.6 411 MH4420wx378yz 420 378 302.4 418 MH4420wx390yz 420 390 312 431 MH4420wx396yz 420 396 316.8 438 MH4420wx420yz 420 420 336 464 MH4550wx420yz 550 420 336 464 MH4550wx444yz 550 444 355.2 491

373 403 458 475 509 542 559 609 643 609 643 678 724 740 724 740 774 804 931 948

258 279 317 328 352 375 386 421 445 421 445 469 500 512 500 512 535 556 644 655 702 722 734 754 766 812 819 865

265 287 326 338 362 386 398 433 457 433 457 482 515 527 515 527 550 572 662 674 722 743 755 776 788 836 843 890

274 296 336 348 373 398 410 447 472 447 472 497 531 543 531 543 568 590 683 696 745 766 779 800 813 862 869 919

296 319 363 377 403 430 443 483 510 483 510 537 574 587 574 587 614 637 738 752 805 828 842 865 878 932 939

310 335 381 395 423 451 465 507 535 507 535 564 602 616 602 616 644 669 775 789 845 869 884 908 922

332 359 408 423 453 483 498 543 573 543 573 604 645 660 645 660 690 716 830 845 905

366 395 449 466 499 532 548 598 631 598 631 665 710 726 710 726 759 789 913 930 996

1015 1044 1062 1091 1108 1175 1185 1252

930 1024 946 1042 972 1070 987 1087

978 1047 1153 986 1056 1162

992 1042 1115 1228

Page 52 | October 2023