Air disconnect-earthing switch OUNMp III SA 24/4Ko 03-082

Safety and reliability in overhead installations.

This aerial disconnect-earthing switch, designated OUNMp III SA 24/4Ko, is a key element protecting street lighting circuits and small consumers. Its design combines solid construction with practical mounting solutions, resulting in long-lasting and trouble-free operation.

Construction and materials

The disconnect is distinguished by the use of high-quality materials. The fuse cover is made of durable plastic, providing insulation and protection against external factors. The fuse holder, designed to operate at 500V and a rated current of 25A, is made of glazed porcelain – this guarantees resistance to weather conditions and longevity. The upper and lower contacts, made of brass, ensure a secure electrical connection. Additionally, metal elements are protected against corrosion with special protective coatings. The upper contact thread is a standard E27, making replacement and servicing easier.

Mounting and compatibility

The disconnect is easy and intuitive to install – it is designed for mounting on bundles of insulated AsXS(n) or non-insulated AL wires, as well as on piercing clamps from various manufacturers. The connectable conductor cross-section at BN-25A ranges from 1.5mm to 10mm. The design based on support insulators and a bearing movable beam ensures simultaneous closing and opening of all poles – this is important for quick and safe circuit disconnection if necessary. The current path consists of main and arcing contacts, mounted on support cassettes directly on the support insulators.

Application and benefits

• Circuit protection: Protects against overload and short circuit in street lighting circuits and other consumers.
• Versatility: Compatible with various types of wires and clamps.
• Durability: Made of high-quality materials resistant to weather conditions and corrosion.
• Safety: Ensures simultaneous disconnection of all poles in the event of a failure or need for maintenance.
• Easy installation: Simple design facilitates installation and servicing.