ShST 20UD
The ShST 20UD pin-type glass insulators are designed for securing and insulating SIP-3 type conductors on overhead power lines and in distribution devices of power plants and substations of alternating current with voltages from 1 to 20 kV inclusive and frequencies up to 100 Hz, operating in ambient temperatures ranging from -60 to +50 °C. The insulators are manufactured according to TU 3493-010-99267582-2015 and comply with GOST 1232.
Technical Specifications:
- Nominal voltage: 20 kV
- Insulator diameter: 216 mm
- Nominal height of the insulator: 214 mm
- Rated mechanical bending strength: 13.0 kN
- Nominal creepage distance: at least 420 mm
- Withstand voltage of standard lightning impulse: 125 kV
- Withstand voltage at 50 Hz (dry conditions): 73 kV
- Withstand voltage at 50 Hz (wet conditions): 50 kV
- Power frequency flashover voltage in insulating medium: at least 140 kV
- Permissible pollution level according to GOST 9920 at 6–10 kV: IV
- Permissible pollution level according to GOST 9920 at 20 kV: II
- Weight: 3.66 kg