IOSK · Polymer post insulators
ИОСК 4-20-350-2
Insulator ИОСК 4-20-350-2
- Series
- ИОСК
- Voltage class, kV
- 20
- Load class (bending), kN
- 4
- Atmospheric pollution degree
- 2
- Structural height, mm
- 350
Technical specifications9 parameters
| Parameter | Value |
|---|---|
| Nominal voltage, kV | 20 |
| Mechanical failing load in bending, not less than, kN | 4,0 |
| Creepage distance, not less than, mm | 680 |
| Structural height H, mm | 350 |
| Insulating length L, mm | 260 |
| Power-frequency withstand voltage for 1 minute, dry/wet, not less than, kV | 65/50 |
| Lightning impulse withstand voltage, “1.2/50”, not less than, kV | 125 |
| 50% power-frequency flashover voltage in wet and polluted condition, not less than, kVat pollution layer surface conductivity (10±1,0) мкСм | 26 |
| Mass, kg | 2,0 |
Parameter names are translated from the Ukrainian catalog; the verbatim catalog wording is preserved in the data. Values are given as in the catalog, without recalculation or rounding.
Data source
IOSK catalog 2024 (in Ukrainian)
Specifications — p. 41 · Catalog numbers — p. 42 · Drawings — p. 42
Catalog numbers
| Catalog number | Porcelain equivalent | Flanges |
|---|---|---|
| P.4.20.350.2/R.D50.2М10/0/R.D50.2М10 | По согласов. | upper: D Ø 50 · d М10 lower: D Ø 50 · d М10 |
Designation structure
- Series
- ИОСК
- Load class (bending), kN
- 4
- Voltage class, kV
- 20
- Structural height, mm
- 350
- Atmospheric pollution degree
- 2
Drawings
Page 42
IOSK catalog 2024 (in Ukrainian)
The drawings are in the PDF catalog on the page indicated. The source documents contain no separate image files.
Product document
ИОСК 4-20-350-2.pdf
PDF available in Ukrainian
Normative documents
ТУ У 31.6-31279430-007:2006 · СОУ МПЕ 40.1.51.302
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ИОСК 4-20-350-2
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