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Disc Insulator For High Voltage
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Disc Suspension Porcelain Insulator (Normal Type)
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Details
GB standard No. XP-70、XP-70C、XP1-70、XP4-70
Main dimensions and standard particulars
Insulator type AC normal type
GB standard No. XP-70 XP-70C XP1-70 XP4-70
Fig 1 2 1 1
Specified mechanical load (kN) 70
Class U70BL U70C U70BS U70BL
Nominal unit spacing (mm) 146 146 127 146
Nominal diameter (mm) 255 255 255 270
Nominal creepage distance (mm) 295/320 295 295/320 330
Ball & socket size 16 16C 16 16
Electro mechanical failing load (kN) 70 70 70 70
Mechanical routine test load (kN) 35 35 35 35
Power frequency withstand voltage Dry (kV) 70 70 70 70
Wet (kV) 40 40 40 40
Lightning impulse withstand voltage (kV) 100 100 100 100
Power frequency puncture voltage (kV) 110 110 110 110
Radio interference voltage Test voltage to ground (kV) 10 10 10 10
Max . RIV at 1MHz (μV) 50 50 50 50
Weight (kg) 4.7/4.9 4.7 4.7/4.8 5.0
Applicable standard:　GB IEC AS BS IS

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