LONG-ROD 220 kV COMPOSITE INSULATORS WITH SILICONE HOUSING

BASIC TECHNICAL DATA LS 70/220-II TB LS 70/220-III TB LS 70/220-IV TB
Rated voltage, kV 220
Maximum working voltage, kV 252
SML,  kN 70
Withstanding power-frequency voltage when dry, kV, not less than 420 450 500
Withstanding power-frequency voltage under rain, kV, not less than 400 420 460
50% flashover voltage of the commercial frequency of a polluted and wet insulator, active value, êV, not less than 260 260 260
Withstanding lightning impulse voltage, kV, not less than 980 1050 1200
Mounting length, H, mm 2010±20 2193±20 2687±20
Arching length, L, mm 1806 1975 2469
Leakage distance, mm, not less than 5790 6300 7900
Pollution rated IEC 60815 II III IV
Weight , kg, approximately 5,1 5,5 7,5

There are four types of insulators classified by the end fitting types: TB, SB, ST, TT. Other end fittings are available by a special request.

Insulators conform to the requirements of IEC 61109

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