The OCK 4-10 type polymeric support insulators are designed for insulating and securing live parts in electrical apparatus and distribution devices of power plants and substations operating with alternating current at voltages up to 10 kV and frequencies up to 100 Hz. They provide reliable insulation in ambient temperatures ranging from -60 °C to +50 °C.

Technical Specifications:

• Rated bending strength: 4 kN
• Structural height (H): from 175 to 305 mm (depending on the model)
• Insulation height (L): from 125 to 225 mm
• Creepage distance: from 225 to 460 mm
• Withstand voltage:
  • lightning impulse: from 85 to 185 kV
  • 50 Hz in dry conditions: from 42 to 130 kV
  • 50 Hz under rain: from 30 to 85 kV
• 50 Hz flashover voltage in polluted and wet conditions: at least 13 kV
• Rated specific surface conductivity of pollution layer: from 5 to 30 µS
• Permissible pollution degree (PD) according to GOST 9920: from I to IV

The insulators comply with the climatic version and placement category UHL1 according to GOST 15150, are manufactured according to TU 3494-024-82442590-2015, and meet the requirements of GOST R 52082.