Air disconnect switch, modular - horizontal 100A RNM III SA 24/4/100S 03-759

Air disconnectors – reliable protection for medium voltage networks

The RNM III SA 24/4/100S air disconnector is a modular element designed for the safe switching on and off of medium voltage electrical circuits. The design of this disconnector, based on proven solutions from ALPAR, guarantees high reliability and long life, making it an ideal choice for both professional installers and end users. The device is particularly recommended for use in electricity distribution networks, transformer stations and connections to industrial and public utility facilities.

Construction and application

The RNM III SA 24/4/100S disconnector is characterized by a horizontal, modular construction, which facilitates its assembly and servicing. It is a three-pole device designed to operate in 24 kV systems at a frequency of 50 Hz. The design of the disconnector allows for flexible adaptation to different network configurations and easy integration with other electrical infrastructure elements. Made of high-quality materials, it provides effective insulation and protection against the effects of weather conditions. It is worth noting that this disconnector can be equipped with porcelain or silicone insulators ("S" version), adapting to the specific requirements of a given application.

Key features and benefits

• High resistance to weather conditions: Operation in a temperature range from -40°C to +40°C and air humidity below 100% ensures reliable operation even in difficult environmental conditions.
• High mechanical strength: Designed for over 2000 switching cycles (on/off), guaranteeing long-term operation without frequent repairs.
• Safety of use: Electrical class E3 and high withstand voltages (50 kV / 60kV network frequency and 125 kV / 145kV lightning impulse) provide effective protection of the installation against damage caused by overvoltages.
• Installation flexibility: Modular construction allows for horizontal mounting on a pole, facilitating integration with existing infrastructure.
• Adaptation to needs: Availability of versions with porcelain or silicone insulators allows for optimal adaptation of the disconnector to specific application requirements.
• Designed to work with surge arresters: The construction allows for the installation of surge arresters, further increasing the level of installation protection.
• Operating parameters: The rated voltage is 24 kV, and the rated frequency is 50 Hz. The device is three-phase with a continuous rated current of 400A. It withstands network frequency voltage at a level of 50 kV / 60kV and impulse lightning voltage at a level of 125 kV / 145kV.

The RNM III SA 24/4/100S disconnector is an investment in the safety and reliability of your power grid. Its solid construction, high technical parameters and installation flexibility make it an optimal solution for both professionals and end users looking for proven solutions in the field of electrical protection.