Air vent valve ONMp III SA 24/4S 03-025

Air disconnect switch – reliable protection for power lines

The ONMp III SA 24/4S air disconnect switch is a device designed for safely disconnecting electrical circuits, especially in street lighting lines and for securing small loads. The construction of this disconnect switch, based on solid materials and a well-thought-out design, ensures long-lasting and trouble-free operation in various weather conditions. It is a key element of energy infrastructure, guaranteeing the safety and efficiency of the network.

Construction and application

The ONMp III SA disconnect switch is characterized by a three-pole modular construction, which allows for flexible adaptation to specific installation needs. Each pole is based on two supporting insulators – one attached to the base and the other to the bearing movable beam. This solution ensures simultaneous closing and opening of all poles, simplifying operation and increasing safety. The fuse cover made of plastic protects against mechanical damage and weather conditions. The fuse socket made of high-dielectric-strength electrical porcelain ensures reliable operation in difficult conditions. It is equipped with a tear-off nut, which further protects against accidental opening of the circuit.

Advantages for installers and end users

• Durable construction: The use of high-quality materials, such as electrical porcelain and galvanized steel profiles, guarantees a long service life and corrosion resistance.
• Modular construction: Allows flexible adaptation of the disconnect switch to different network configurations and easy assembly and disassembly.
• Safety of use: Simultaneous closing and opening of all poles minimizes the risk of errors during operation and provides complete protection against electric shock.
• Easy installation: Designed for direct mounting on the pole, simplifying the installation process and reducing costs associated with mounting additional structural elements.
• Versatile application: Ideal for securing street lighting circuits and small loads in various environmental conditions.
• Insulators: Availability in porcelain, composite or silicone insulators allows adaptation to specific project requirements.
• Movable joint: Equipped with a movable joint with a current clamp (up to 95 mm², optionally 120 mm²), which prevents breakage of the cable or power supply cable during operation.
• Current clamps: It has current clamps allowing connection of a cable or wire with a cross-section of up to 95 (120) mm², ensuring optimal current flow thanks to the flexible copper connector.

This disconnect switch is a solid solution for professionals involved in the construction and maintenance of power networks, as well as for end users looking for reliable protection of their electrical installations.