Air disconnect-earthing switch OUN III SA 24/4S 03-010

Safe disconnection and grounding of overhead lines

This three-pole overhead disconnect switch, known as OUN III SA 24/4S, is a reliable solution for safely disconnecting and grounding medium-voltage lines. The device's design, developed by ALPAR, ensures simultaneous operation of all poles, which significantly simplifies the process of disconnecting network segments.

• Pole synchronization: A common base and drive guarantee simultaneous closing and opening of all three poles – this minimizes the risk of incorrect operations and increases safety.
• Robust construction: Each pole is supported by two support insulators, ensuring stability and durability in harsh weather conditions. One insulator is permanently connected to the base, and the other to a bearing-mounted movable beam.
• Versatility: The availability of porcelain, composite, and silicone insulators allows the disconnect switch to be adapted to specific installation requirements and environmental conditions. The choice of the appropriate insulator material affects resistance to dirt, moisture, and UV radiation.

The device is used in transformer stations, overhead switchgear, and medium-voltage transmission lines. Its solid construction and precise operation translate into long-term and trouble-free operation, which is crucial for ensuring the continuity of electricity supply. Installation is simple thanks to the well-thought-out design – both for experienced installers and those less familiar with this type of equipment.