3-pole circuit breaker 125A motor protection NZMN2-M125 265723

Power switch for motor and installation protection

This three-pole power switch with a rated current of 125A is a reliable solution for protecting motors and electrical circuits. Designed by Eaton, it combines overload and short-circuit protection, ensuring the safety and continuity of the installation. This switch is particularly useful in applications requiring high resistance to shock loads, typical of motor starts.

Characteristics and application

The NZMN2-M125 circuit breaker with a thermomagnetic release is dedicated to the protection of electric motors. Its fixed mounting design guarantees stability and reliability of operation. The rated operating power for AC-3 is 55 kW at 400 V, making it a suitable choice for a wide range of industrial and commercial applications. The adjustable range of the overload release (100-125A) and short-circuit release (1000-1750A) allows for precise adaptation to the specifics of the protected installation. Lack of phase failure sensitivity is an additional advantage in applications where there is a risk of voltage asymmetry.

Key features and benefits

• Versatility: Suitable for use in installations with a rated voltage of 690 V, ensuring compatibility with various power systems.
• High breaking capacity: Rated short-circuit breaking capacity Icu at 35 kA at 400 V guarantees effective disconnection in the event of a short circuit, minimizing the risk of damage.
• Thermal protection: Built-in thermal protection protects the motor from overheating, extending its life and reducing failure-related costs.
• Solid construction: The fixed device made of high-quality materials ensures durability and reliability even in harsh working conditions (IP20 protection).
• Easy installation: Screw connection of the main contacts facilitates and speeds up the installation process.
• Work optimization: Characteristic C allows it to react more slowly to short current surges, therefore it tolerates starting devices with a motor well.
• Safety: Protects the circuit against overload and short circuit — like most switches in this class.
• Power losses: Low power losses of 27.6 W translate into energy savings in the long run.