U70 Standard suspension insulatorType: U70Diameter D(mm): 380Spacing H(mm): 146Creepage L(mm): 365Socket soupling(mm): 16Mechanical failing load(kn): 70Mechanical routine test(kn): 35Wet power frequency withstand voltage(kv): 45Dry lightning impulse withstand voltage(kv): 90Impulse puncture voltage(p. U. ): 2.8Power frequency puncture voltge(kv): 130Rodio influence voltage10kv, 1MHz(uV): 50Corona visual test(kv): 18/22Power frequency electric arc voltage: 0.12s/20kaNet weight per unit(Kg): 5.3