The OCK 3-35 series insulators 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 and comply with the climatic category UHL1 according to GOST 15150.

Technical Specifications:

• Rated Voltage: 35 kV
• Rated Bending Breaking Strength: 3 kN
• Rated Torsional Breaking Moment: 200 N·m
• Structural Height (H): 440 mm
• Insulation Height (L): 345 mm
• Creepage Distance: at least 1180 mm
• Withstand Voltage of Lightning Impulse: 225 kV
• Withstand Voltage at Industrial Frequency in Dry Conditions: 180 kV
• Withstand Voltage at Industrial Frequency under Rain: 135 kV
• Flashover Voltage under Pollution and Moisture: at least 42 kV
• Rated Surface Conductivity of Pollution Layer: 10 μS/cm
• Permissible Pollution Degree according to GOST 9920: II

Mounting Dimensions:

• Height (H): 440 mm
• Top Flange: Ø140 mm, 4 holes M12
• Bottom Flange: Ø140 mm, 4 holes Ø14 mm

The insulators are manufactured according to TU 3494-024-82442590-2015 and comply with GOST R 52082.