HV porcelain pin insulator of SHF20G1 type
There are three modifications of the insulator after the manner of its coupling:
with the polyethylene capsule, with the composite material thread corresponding to the requirements of SFS (Finland) standard and BS (Great Britain) - a small head.
Производитель изоляторов штыревых фарфоровых ШФ-20 Г
Minimum voltage |
Nominal |
kV |
20 |
Puncture voltage in insulating medium |
kV |
180 |
50 Hz withstand voltage (dry) |
kV |
85 |
50 Hz withstand voltage (wet) |
kV |
65 |
Impulse withstand voltage |
kV |
135 |
Average annual number of failure, not more than |
N/per year |
0.0005 |
Nominal creepage distance, not less than |
mm |
400±10 |
Minimum mechanical failing load (bending), not less than |
kN |
13 |
Weight |
kg |
3.5±0.3 |