Glass Insulator-Serienfahrwerk U70B / 146

Alternating-current system Disk-shaped suspending insulator Standard suspension insulatorThis is characteristics for only some types of glass insulator. For other information, please visit our website or contact us. Insulator Model U70B/146 U210B/170 U240B/170 Diameter D (mm) 255 280 280 Structure H (mm) 146 170 170 Creepage distance L (mm) 320 400 400 Socket coupling (mm) 16 20 24 Mechanical failing load (kN) 70 210 240 Mechanical routine test (kN) 35 105 120 Dry power frequency withstand voltage (kV) 70 75 75 Wet power frequency withstand voltage (kV) 40 45 45 Dry lightning impulse withstand voltage (kV) 100 110 110 Impulse puncture voltage (p.u.) 2.8 2.8 2.8 Min power frequency puncture voltage (kV) 130 130 130 Radio influence voltage (μV) ≤50 ≤50 ≤50 Electric iron visual test (kV) 18/22 18/22 18/22 Power frequency electric arc voltage 0.12s/20kA 0.12s/20kA 0.12s/20kA Net weight per unit (kg) 3.6 7.2 7.5 This is characteristics for only some types of glass insulator. For other information, please visit our website or contact us.