| Brand | ROCKWILL |
| Model NO. | Station Class Arresters 3 to 72kV |
| Rated voltage | 72.5kV |
| Series | YH10WZ |
YH10WZ arresters meet the Intermediate requirements of IEEE C62.11 and the Station Low requirements of IEC 60099-4. While not a true distribution class arrester, this design is suitable for equipment protection or enhanced protective capability on distribution lines. An option is available for both Imperial and Metric hardware.
YH10WZ arresters comply with the latest revision of IEC 60099-4
Long lasting ESPTM housing material with superior mechanical strength and electrical characteristics
Robust sealing system protects internal components from moisture ingress to extend service lifetime
| Base Imperial Catalog Number | Base Metric Catalog Number | MCOV (kV) | Duty Cycle Rating, Ur (kV) | Temporary overvoltage capability (kV) No prior duty | Max steep current impulse residual voltage (kV) | Max switching impulse residual voltage (kV) | Max lightning impulse residual voltage (kV) | ||||||
| 1s | 10s | 10kA | 0.5kA | 1.5kA | 3kA | 5kA | 10kA | 20kA | 40kA | ||||
| 218403 | 214503 | 2.55 | 3 | 3.6 | 3.4 | 10.7 | 6.6 | 7.1 | 7.4 | 7.8 | 8.1 | 9.1 | 10.2 |
| 218405 | 214505 | 5.1 | 6 | 7.1 | 6.8 | 19.6 | 13.1 | 14.1 | 14.8 | 15.5 | 16.2 | 18.2 | 20.4 |
| 218408 | 214508 | 7.65 | 9 | 10.7 | 10.3 | 28.6 | 19.7 | 21.3 | 22.3 | 23.4 | 24.4 | 27.4 | 30.8 |
| 218409 | 214509 | 8.4 | 10 | 11.8 | 11.3 | 31.4 | 21.8 | 23.4 | 24.6 | 25.8 | 26.9 | 30.2 | 33.9 |
| 218410 | 214510 | 10.2 | 12 | 14.3 | 13.7 | 37.3 | 26.1 | 28.1 | 29.5 | 30.9 | 32.3 | 36.3 | 40.7 |
| 218413 | 214513 | 12.7 | 15 | 17.8 | 17 | 47.8 | 32.8 | 35.4 | 37.1 | 38.9 | 40.6 | 45.6 | 51.2 |
| 218415 | 214515 | 15.3 | 18 | 21.4 | 20.5 | 56.9 | 39.5 | 42.5 | 44.6 | 46.8 | 48.8 | 54.8 | 61.5 |
| 218417 | 214517 | 17 | 21 | 23.8 | 22.8 | 62.4 | 43.5 | 46.9 | 49.2 | 51.5 | 53.8 | 60.4 | 67.8 |
| 218420 | 214520 | 19.5 | 24 | 27.3 | 26.1 | 74.3 | 52.3 | 56.3 | 59 | 61.9 | 64.6 | 72.5 | 81.5 |
| 218422 | 214522 | 22 | 27 | 30.8 | 29.5 | 85.1 | 59.2 | 63.8 | 66.9 | 70.1 | 73.2 | 82.2 | 92.3 |
| 218424 | 214524 | 24.4 | 30 | 34.2 | 32.7 | 93.4 | 65.3 | 70.3 | 73.8 | 77.3 | 80.7 | 90.6 | 101.8 |
| 218429 | 214529 | 29 | 36 | 40.6 | 38.9 | 111.3 | 78.4 | 84.4 | 88.6 | 92.8 | 96.9 | 108.8 | 122.2 |
| 218431 | 214531 | 31.5 | 39 | 44.1 | 42.2 | 118.9 | 83 | 89.4 | 93.8 | 98.3 | 103 | 115.2 | 129.4 |
| 218436 | 214536 | 36.5 | 45 | 51.1 | 48.9 | 136 | 95.8 | 103 | 108 | 113.4 | 118 | 133 | 149.3 |
| 218439 | 214539 | 39 | 48 | 54.6 | 52.3 | 148 | 105 | 113 | 118 | 123.8 | 129 | 145 | 162.9 |
| 218442 | 214542 | 42 | 54 | 58.8 | 56.3 | 161 | 113 | 122 | 128 | 134 | 140 | 157 | 176.4 |
| 218448 | 214548 | 48 | 60 | 67.2 | 64.3 | 179 | 126 | 136 | 143 | 149.5 | 156 | 175 | 196.8 |
| 218457 | 214557 | 57 | 72 | 79.8 | 76.4 | 216 | 152 | 164 | 172 | 180.5 | 188 | 212 | 237.6 |
| Base Imperial Catalog Number | Base Metric Catalog Number | MCOV | Duty Cycle Rating, Ur | Arrester Only Height | Creepage Distance | Strike Distance with Bracket | Recommended Clearances - Inches (mm) | Arrester Only Weight | Lightning Withstand Voltage | Power Frequency Withstand Voltage - Wet | |
| kV | kV | Inches (mm) | Inches (mm) | Inches (mm) | Phase - Phase | Phase - Ground | Pounds (kg) | kVpk | kVpk | ||
| 218403 | 214503 | 2.55 | 3 | 5.5 (140) | 15.4 (391) | 5.6 (142) | 4.4 (112) | 3.3 (84) | 4.6 (2.1) | 110 | 52 |
| 218405 | 214505 | 5.1 | 6 | 5.5 (140) | 15.4 (391) | 5.6 (142) | 4.6 (117) | 3.3 (84) | 4.6 (2.1) | 110 | 52 |
| 218408 | 214508 | 7.65 | 9 | 5.5 (140) | 15.4 (391) | 5.6 (142) | 4.7 (119) | 3.3 (84) | 4.6 (2.1) | 110 | 52 |
| 218409 | 214509 | 8.4 | 10 | 5.5 (140) | 15.4 (391) | 5.6 (142) | 4.9 (124) | 3.5 (89) | 4.6 (2.1) | 110 | 52 |
| 218410 | 214510 | 10.2 | 12 | 5.5 (140) | 15.4 (391) | 5.6 (142) | 4.9 (124) | 3.5 (89) | 4.6 (2.1) | 110 | 52 |
| 218413 | 214513 | 12.7 | 15 | 10.9 (276) | 30.8 (782) | 10.8 (274) | 6.2 (157) | 4.8 (122) | 8.4 (3.8) | 175 | 105 |
| 218415 | 214515 | 15.3 | 18 | 10.9 (276) | 30.8 (782) | 10.8 (274) | 6.6 (168) | 5.2 (132) | 8.4 (3.8) | 175 | 105 |
| 218417 | 214517 | 17 | 21 | 10.9 (276) | 30.8 (782) | 10.8 (274) | 7.6 (193) | 6.2 (157) | 8.4 (3.8) | 175 | 105 |
| 218420 | 214520 | 19.5 | 24 | 10.9 (276) | 30.8 (782) | 10.8 (274) | 7.6 (193) | 6.2 (157) | 8.4 (3.8) | 175 | 105 |
| 218422 | 214522 | 22 | 27 | 16.3 (415) | 46.2 (1173) | 16.1 (408) | 9.6 (244) | 8.2 (208) | 12.3 (5.6) | 204 | 134 |
| 218424 | 214524 | 24.4 | 30 | 16.3 (415) | 46.2 (1173) | 16.1 (408) | 9.8 (249) | 8.4 (213) | 12.3 (5.6) | 204 | 134 |
| 218429 | 214529 | 29 | 36 | 16.3 (415) | 46.2 (1173) | 16.1 (408) | 9.8 (249) | 8.4 (213) | 12.3 (5.6) | 204 | 134 |
| 218431 | 214531 | 31.5 | 39 | 21.7 (551) | 61.6 (1564) | 21.3 (541) | 12.8 (325) | 11.4 (290) | 18.5 (8.4) | 260 | 180 |
| 218436 | 214536 | 36.5 | 45 | 21.7 (551) | 61.6 (1564) | 21.3 (541) | 12.8 (325) | 11.4 (290) | 18.5 (8.4) | 260 | 180 |
| 218439 | 214539 | 39 | 48 | 21.7 (551) | 61.6 (1564) | 21.3 (541) | 12.8 (325) | 11.7 (297) | 18.5 (8.4) | 260 | 180 |
| 218442 | 214542 | 42 | 54 | 28.4 (721) | 77.0 (1956) | 26.5 (673) | 15.8 (401) | 14.4 (366) | 23.3 (10.6) | 315 | 225 |
| 218448 | 214548 | 48 | 60 | 28.4 (721) | 77.0 (1956) | 26.5 (673) | 15.8 (401) | 14.4 (366) | 23.3 (10.6) | 315 | 225 |
| 218457 | 214557 | 57 | 72 | 33.8 (859) | 92.1 (2340) | 31.7 (805) | 19.8 (503) | 18.4 (467) | 26.0 (11.8) | 370 | 270 |
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