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CTV 254 Isolator En Verre U70b

70kN Glass insulator

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    Parameter table
    Type Ball and socket type Tongue-ball
    IEC-standard U70BS U70BL   U70C
    Factory-standard     PS70I  
    Standard coupling, d mm 16A 16A 16A 16C
    Mechanical failing load kN 70 70 70 70
    Mechanical routine test kN 56 56 56 56
    Diameter of the insulating part, D mm 255 255 255 255
    Nominal Spacing, H mm 127 146 146 146
    Nominal creepage distance mm 320 320 407 320
    Power frequency puncture voltage kV 130 130 130 130
    power frequency withstand voltage - dry kV 70 70 72 70
    power frequency withstand voltage - wet kV 40 40 42 40
    Impulse puncture voltage P.U 2.8 2.8 2.8 2.8
    Radio influence voltage 10kV 1MHz μv 50 50 50 50
    Corona visual test kV 18/22 18/22 18/22 18/22
    Power frequency electric arc voltage ka 0.12s/20kA 0.12s/20kA 0.12s/20kA 0.12s/20kA
    Weight kg 3.5 3.6 4.3 3.8