HL toughened glass insulators Electric iron visual test 18kV/22kV Impulse puncture voltage 2.8P.u Net weight per unit 3.5kg U70B toughened glass insulators ParametersModelIEC standard insulatorsU70B/127U70B/146U70B/140Chinese modelLXP2-70LXP1-70LXP3-70Minimum mechanical failing load70kN70kN70kNH Spacing H127mm146mm140mmD Diameter D255mm255mm255mmL Creepage L320mm320mm320mmBall and socket ...