The ShST 20ED pin-type glass insulators are designed for securing and insulating uninsulated and insulated conductors of the SIP-3 type on overhead power lines and in distribution devices of power plants and substations of alternating current with voltages up to 20 kV inclusive and frequencies up to 100 Hz, operating in ambient temperatures ranging from -60 to +50 °C. The conductor can be fixed in the groove or on the neck of the insulator. 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: 165 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 20 kV: II
• Permissible pollution level according to GOST 1232: IV
• Weight: 3.39 kg