Polymer support insulators of type OSK 12.5-35 are designed for insulating and securing current-carrying parts in electrical apparatuses and distribution devices of power plants and substations operating with alternating current at 35 kV and frequencies up to 100 Hz. They provide reliable insulation within an ambient temperature range from -60 °C to +50 °C. The climatic version and placement category comply with UHL1 according to GOST 15150. The insulators are manufactured according to TU 3494-024-82442590-2015 and conform to GOST R 52082.

Key Technical Specifications:

• Rated Ultimate Bending Strength: 12.5 kN
• Rated Ultimate Torsional Moment: 1.0 kN·m
• Construction Height: 400 mm or 440 mm, depending on the model
• Insulation Height: 346 mm
• Creepage Distance: 1160 mm
• Withstand Voltage of Lightning Impulse: 200 kV
• Withstand Voltage at 50 Hz in Dry Conditions: 165 kV
• Withstand Voltage at 50 Hz under Rain: 120 kV
• Discharge Voltage at 50 Hz in Polluted and Humid Conditions: not less than 42 kV
• Rated Specific Surface Conductivity of Pollution Layer: 20 µS
• Permissible Pollution Degree according to GOST 9920: III
• Weight: not more than 6.2 kg

Mounting Dimensions:

• Upper and Lower Flanges: diameter of 140 mm with four holes of M12 or M16, depending on the model

These insulators are essential components in ensuring the safety and reliability of electrical systems operating at 35 kV, providing effective insulation and mechanical support under various environmental conditions.