HV glass suspension insulator of U120B type

Technical Specifications
Insulator type IEC U120B
Minimum mechanical failing load kN 120
Minimum mechanical residual strength kN 96
Diameter of the insulating part, D mm 255
Spacing, H mm 127 146 170
Nominal creepage distance mm 320
Ball and socket coupling, d (IEC 60120) mm 16
Puncture voltage in insulating medium kV 130
50 Hz withstand voltage (dry) kV 70
50 Hz withstand voltage (wet) kV 45
Dry lightning impulse withstand voltage 1.2/50 (+/-) kV 100/100
Impulse puncture test voltage in air kV 280...310
Radio interference voltage at 0.5 MHz dB 60
kV 20
dB 86
kV 30
Weight kg 3.9
All technical requirements and testing are in accordance with IEC standards.