Circuit breaker NZMN3-4-A400 109696

Power switch – reliable installation protection

The NZMN3-4-A400 circuit breaker is a four-pole device designed to protect electrical installations with a rated current of 400A. It provides effective protection against overloads and short circuits, which translates to user safety and longer life of connected devices. The design based on a thermal-magnetic trip unit guarantees a quick and precise response in the event of a failure.

Construction and application

This circuit breaker is characterized by a fixed construction, which means it is designed for permanent installation. It is intended for a wide range of applications in commercial, industrial buildings and in residential installations requiring high reliability. Thanks to the possibility of connecting an optional motor drive, the circuit breaker can be remotely controlled, which increases its functionality. The main connection is made using screw connections, which ensures a secure and durable connection of the wires.

Key features and benefits

• High short-circuit breaking capacity: The rated short-circuit breaking capacity (Icu) is as high as 50 kA at 400V, which guarantees effective protection even in the event of large short-circuit currents.
• Wide range of overload trip unit adjustment: Adjustment in the range of 320-400A allows for precise adaptation to the load characteristics, minimizing the risk of unnecessary tripping.
• Thermal-magnetic trip unit: Provides protection against both overloads and short circuits, which is crucial for installation safety. Characteristic C allows it to react more slowly to short current surges, therefore it tolerates starting motors well.
• Solid construction: The device made of high-quality materials ensures long-lasting and reliable operation in various environmental conditions (IP20).
• Expandability: The option of mounting a motor drive increases the functionality of the device and enables remote control.
• Safety: Protects the circuit from overload and short circuit — like most circuit breakers in this class.
• Versatility: Suitable for protecting various types of electrical circuits, both in residential and industrial buildings.

The NZMN3-4-A400 circuit breaker is a solid and reliable solution for anyone who values safety and long-lasting operation of electrical installations. It is a product of a renowned manufacturer – Eaton Electric – guaranteeing high quality workmanship and compliance with applicable standards.