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50 kip / 210 kN SML Data

Suspension Insulators

Mechanical Ratings: SML = 50 kip/210 kN
RTL = 25 kip/105 kN
Rod Diameter: 7/8" (22 mm)
Selection Guide:
Typical Line Voltage, kV		 Catalog
Numbers
ANSI/
IEC		 Nominal
Polymer
Length
inches		 Section
Length
inches
(mm)		 Strike
Distance
inches
(mm)		 Leakage
Distance
inches
(mm)		 ANSI Values IEC Values
60-Hz
Dry
Flashover
(kV)		 60-Hz
Wet
Flashover
(kV)		 Critical
Impulse
Positive
(kV)		 Critical
Impulse
Negative
(kV)		 60-Hz
1-minute
Wet
Withstand
(kV)		 Impulse
Positive
Withstand
(kV)		 Impulse
Negative
Withstand
(kV)
69 110 132 161 220 330 400
              S050021S2010
S210021S2010		 21 35.7 (907) 21.6 (549) 55 (1397) 220 210 370 350 145 315 300
S050021H2010/
S210021H2010		 21 35.7 (907) 22.5 (572) 74 (1880) 225 215 375 355 150 330 315
S050023S2010/
S210023S2010		 23 37.9 (963) 23.8 (605) 60 (1524) 250 235 415 395 165 350 330
S050023H2010/
S210023H2010		 23 37.9 (963) 24.7 (627) 82 (2083) 255 240 420 400 170 360 345
  S050030S2010/
S210030S2010		 30 44.4 (1128) 30.3 (770) 77 (1956) 315 305 525 510 210 445 430
S050030H2010/
S210030H2010		 30 44.4 (1128) 31.1 (790) 104 (2642) 320 310 540 520 215 455 445
    S050036S2010/
S210036S2010		 36 50.8 (1290) 36.8 (935) 93 (2362) 385 365 635 625 260 540 530
S050036H2010/
S210036H2010		 36 50.8 (1290) 37.6 (955) 126 (3200) 395 375 650 625 265 550 540
S050043S2010/
S210043S2010		 43 57.3 (1455) 43.2 (1097) 110 (2794) 460 435 730 725 300 630 625
S050043H2010/
S210043H2010		 43 57.3 (1455) 44.1 (1120) 149 (3785) 470 445 745 735 310 640 635
    S050047S2010/
S210047S2010		 47 61.6 (1565) 47.6 (1209) 121 (3073) 500 475 800 800 330 690 690
S050047H2010/
S210047H2010		 47 61.6 (1565) 48.4 (1229) 164 (4166) 510 480 810 805 335 705 700
  S050051S2010/
S210051S2010		 51 66 (1676) 51.9 (1318) 132 (3353) 540 510 865 860 360 755 750
S050051H2010/
S210051H2010		 51 66 (1676) 52.7 (1339) 179 (4547) 545 515 880 875 365 765 765
S050056S2010/
S210056S2010		 56 70.3 (1786) 56.2 (1427) 143 (3632) 585 545 935 935 385 810 810
S050056H2010/
S210056H2010		 56 70.3 (1786) 57.1 (1450) 194 (4928) 590 555 945 945 390 825 825
S050060S2010/
S210060S2010		 60 74.6 (1895) 60.5 (1537) 154 (3912) 625 580 1000 1005 410 870 875
S050060H2010/
S210060H2010		 60 74.6 (1895) 61.4 (1560) 209 (5309) 630 590 1015 1015 420 885 890
    S050064S2010/
S210064S2010		 64 78.9 (2004) 64.8 (1646) 165 (4191) 660 615 1065 1075 435 930 940
S050064H2010/
S210064H2010		 64 78.9 (2004) 65.7 (1669) 224 (5690) 670 620 1075 1080 445 945 950
S050069S2010/
S210069S2010		 69 83.2 (2113) 69.2 (1758) 176 (4470) 695 650 1130 1140 465 990 1000
S050069H2010/
S210069H2010		 69 83.2 (2113) 70 (1778) 239 (6071) 705 655 1140 1150 470 1000 1010
S050073S2010/
S210073S2010		 73 87.6 (2225) 73.5 (1867) 187 (4750) 735 685 1200 1210 490 1050 1060
S050073H2010/
S210073H2010		 73 87.6 (2225) 74.3 (1887) 254 (6452) 745 695 1210 1220 495 1060 1075
S050077S2010/
S210077S2010		 77 91.9 (2334) 77.8 (1976) 198 (5029) 780 720 1260 1275 515 1110 1125
S050077H2010/
S210077H2010		 77 91.9 (2334) 78.7 (1999) 268 (6807) 785 725 1275 1285 520 1120 1130
S050081S2010/
S210081S2010		 81 96.2 (2443) 82.1 (2085) 209 (5309) 815 745 1325 1345 540 1165 1180
S050081H2010/
S210081H2010		 81 96.2 (2443) 83 (2108) 283 (7188) 825 755 1335 1350 545 1175 1195
S050086S2010/
S210086S2010		 86 100.5 (2553) 86.4 (2195) 220 (5588) 860 780 1400 1420 565 1220 1240
S050086H2010/
S210086H2010		 86 100.5 (2553) 87.3 (2217) 298 (7569) 865 800 1415 1425 570 1235 1255
S050090S2010/
S210090S2010		 90 104.8 (2662) 90.8 (2306) 231 (5867) 890 815 1460 1485 585 1280 1305
S050090H2010/
S210090H2010		 90 104.8 (2662) 91.6 (2327) 313 (7950) 900 825 1475 1500 590 1290 1310
    S050094S2010/
S210094S2010		 94 109.2 (2774) 95.1 (2416) 242 (6147) 925 850 1520 1545 610 1340 1360
S050094H2010/
S210094H2010		 94 109.2 (2774) 95.9 (2436) 328 (8331) 935 860 1545 1565 615 1350 1370
S050099S2010/
S210099S2010		 99 113.5 (2883) 99.4 (2525) 253 (6426) 960 875 1575 1605 630 1395 1420
S050099H2010/
S210099H2010		 99 113.5 (2883) 100.3 (2548) 343 (8712) 970 885 1590 1615 635 1405 1430
S050103S2010/
S210103S2010		 103 117.8 (2992) 103.7 (2634) 264 (6706) 990 890 1640 1670 655 1445 1475
S050103H2010/
S210103H2010		 103 117.8 (2992) 104.6 (2657) 358 (9093) 1000 900 1650 1675 660 1460 1485
S050107S2010/
S210107S2010		 107 122.1 (3101) 108 (2743) 275 (6985) 1010 920 1695 1725 675 1505 1530
S050107H2010/
S210107H2010		 107 122.1 (3101) 108.9 (2766) 373 (9474) 1020 925 1700 1735 680 1515 1545
S050112S2010/
S210112S2010		 112 126.4 (3211) 112.4 (2855) 286 (7264) 1045 950 1755 1790 700 1560 1590
S050112H2010/
S210112H2010		 112 126.4 (3211) 113.2 (2875) 388 (9855) 1050 955 1760 1800 705 1570 1600
S050116S2010/
S210116S2010		 116 130.8 (3322) 116.7 (2964) 297 (7544) 1070 975 1815 1855 720 1615 1650
S050116H2010/
S210116H2010		 116 130.8 (3322) 117.5 (2985) 403 (10236) 1080 985 1825 1860 720 1620 1660
    S050120S2010/
S210120S2010		 120 135.1 (3432) 121 (3073) 308 (7823) 1100 1005 1875 1915 740 1665 1705
S050120H2010/
S210120H2010		 120 135.1 (3432) 121.9 (3096) 418 (10617) 1110 1010 1885 1925 745 1680 1715
S050125S2010/
S210125S2010		 125 139.4 (3541) 125.3 (3183) 319 (8103) 1125 1030 1935 1980 760 1720 1760
S050125H2010/
S210125H2010		 125 139.4 (3541) 126.2 (3205) 433 (10998) 1135 1040 1945 1985 765 1730 1770
S050129S2010/
S210129S2010		 129 143.7 (3650) 129.6 (3292) 330 (8382) 1155 1055 1995 2040 780 1775 1815
S050129H2010/
S210129H2010		 129 143.7 (3650) 130.5 (3315) 448 (11379) 1165 1065 2000 2050 780 1785 1825
S050133S2010/
S210133S2010		 133 148 (3759) 134 (3404) 341 (8661) 1180 1080 2055 2100 795 1830 1870
S050133H2010/
S210133H2010		 133 148 (3759) 134.8 (3424) 463 (11760) 1190 1090 2060 2110 800 1840 1885
S050138S2010/
S210138S2010		 138 152.4 (3871) 138.3 (3513) 352 (8941) 1205 1105 2110 2160 815 1880 1925
S050138H2010/
S210138H2010		 138 152.4 (3871) 139.1 (3533) 478 (12141) 1215 1115 2120 2170 820 1890 1935
S050142S2010/
S210142S2010		 142 156.7 (3980) 142.6 (3622) 363 (9220) 1230 1130 2170 2220 835 1935 1980
S050142H2010/
S210142H2010		 142 156.7 (3980) 143.5 (3645) 493 (12522) 1240 1140 2175 2230 840 1940 1990

Section Length Adjustment Table, Base End Fittings: Y-clevis-Ball (201)

Top Fitting Bottom Fitting Top and Bottom End Fitting Digits ("e" & "f")
in Catalog Number		 Length Change inches (mm)
Y-Clevis
Eye
Eye
ANSI 52-11 Ball
 200
001		 1.71 (43)
0.31 (8)
Eye
Eye
 000 2.02 (51)
ANSI 52-11 Socket
IEC 20 mm Socket
ANSI 52-11 Ball
IEC 20 mm Ball
 301
A07		 -0.71 (-18)
0.26 (7)
Clevis IEC 19-L
Clevis IEC 19-L
Eye
IEC 20 mm Ball
 800
807		 0.80 (20)
0.06 (2)
  • To determine the section length for an insulator with a different end fitting combination, please add or subtract the displayed length change in the table above. For configurations not shown, use the Catalog Number Key or contact your HPS representative.

Notes:

  • Dimensional and electrical values displayed in main table are for an insulator with Y-clevis and Ball end fittings.
  • For voltages above 400 kV, other section lengths, or end fitting combinations, please contact your HPS representative.
  • Electrical values are without corona ring. For voltages equal to or greater than 220 kV, refer to page 8 for corona rings and associated physical/electrical changes to the above data. Dimensions are within allowable tolerances as specified by IEC 61109 and ANSI C29.12.
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