Suspension Porcelain Insulators Disc Suspension Insulators For Ground Overhead Lines

H

200

210

D

160

170

Min. creepage distance L

160

170

Power frequency withstand voltage   Wet (kV)

≥30

Power frequency punctured voltage (kV)

≥110

Rated E&M failing load (kN) (testing voltage 40kV)

70

100

Damage strength (N.cm)

≥565

≥678

Power frequency flashover voltage remove the top electrode (effective values)

Wet(kV)

≥45

Dry(kV)

≥25

Power frequency (wet or dry) discharge voltage (clearance distance20mm) (effective values) kV

Upper limit value

30

Lower limit value

8

Power frequency recovery voltage 2500V extinguishing arc current (clearance distance 15 mm) (effective values)

Inductive current

≥35

Capacitive current

≥20

Electrode arc resistance ability

Power frequency current kA (effective values)

≥10

Time s

≥0.2

Number times

≥2