Air vent valve ONMp III SA 24/4 03-017

Air disconnect switch ONMp III SA 24/4 – reliable protection for power lines

The ONMp III SA 24/4 air disconnect switch is a key element of power infrastructure, designed to safely disconnect circuits in overhead lines. The device's construction, based on an asymmetrical three-pole design, ensures simultaneous operation of all poles, which translates to speed and reliability. This is particularly important during maintenance and repair work, minimizing power outage time.

Construction and application

The ONMp III SA 24/4 is characterized by a common support beam and drive for all poles. This design simplifies installation and operation, and also increases the stability of the device. The ability to use different types of insulators – porcelain, silicone or composite – allows the disconnect switch to be adapted to specific environmental conditions and installation requirements. The device is adapted for direct mounting on the pole bracket, which simplifies the installation process and reduces costs.

The application of the ONMp III SA 24/4 includes:

• Circuit disconnection: Safe disconnection of a section of the network for maintenance or repair work.
• Short-circuit protection: Protection of the electrical installation against the effects of short circuits and overvoltages.
• Line isolation: Providing safe working conditions for personnel servicing the overhead line.
• Switching operations: Enabling safe switching of circuits in transformer stations and switchgear.

Key features and benefits

• Asymmetrical three-pole design: Ensures simultaneous operation of all poles, increasing safety and work efficiency.
• Choice of insulators: Allows the disconnect switch to be adapted to specific environmental conditions (porcelain, silicone, composite). Silicone insulators are characterized by better resistance to dirt and weather conditions than traditional porcelain insulators.
• Pole mounting: Simplifies the installation process and reduces mounting costs.
• Common drive: Enables synchronization of operations on all poles, minimizing the risk of damage to the installation.
• Durable construction: Ensures long-lasting and reliable operation in harsh operating conditions.
• Adapted for cooperation with manual (NRA(u)) or motor drives (NEA): Provides flexibility in choosing the device control method.