Flexible bus supports for 110-220 kV voltage are designed to insulate and secure busbar conductors in the switchgear of power plants and substations. They are rated for nominal voltages up to 220 kV and frequencies up to 100 Hz, ensuring reliable operation in ambient temperatures ranging from -60°C to +50°C.

The design incorporates rod-type support insulators with a solid silicone-organic protective coating of the OCK 110-220 type. The climatic design and placement category comply with UHL 1 according to GOST 15150. The products are manufactured according to TU 3494-030-82442590-2018.

Main Technical Characteristics of Flexible Bus Supports:

• Rated breaking bending strength: from 8 to 12.5 kN, depending on the model.
• Permissible wire tension: from 2.0 to 10 kN.
• Insulation height: from 960 to 2060 mm.
• Creepage distance: from 2850 to 6300 mm.
• Withstand voltage:
  • Impulse voltage: from 490 to 950 kV.
  • 50 Hz in dry conditions: from 320 to 440 kV.
  • 50 Hz under rain conditions: from 260 to 440 kV.
• Discharge voltage at 50 Hz in polluted and wet conditions: from 110 to 220 kV.
• Standard specific surface conductivity of the pollution layer: 10 or 20 µS/cm.
• Permissible pollution severity (PS) according to GOST 9920: II or III.
• Seismic resistance on the MSK-64 scale: at least 9 points.
• Allowable wind speed without icing: up to 40 m/s; with icing (20 mm wall thickness): up to 15 m/s.