Circuit breaker NZMN3-A400 109670

Power switches NZM – reliable circuit protection

NZM series switches, such as the NZMN3-A400 model, are compact devices designed for reliable protection of electrical installations in various industrial and construction applications. They are characterized by flexible mounting and the possibility of expansion with modular function groups. Equipped with a thermomagnetic release, they effectively protect against overloads and short circuits, protecting both the installation and connected devices.

Construction and application

The NZMN3-A400 switch is a three-pole fixed-mounted device designed to operate in circuits with a rated voltage of 690 V and a continuous current of 400 A. Its construction based on solid materials guarantees long-lasting and trouble-free operation even in demanding conditions. The short-circuit breaking capacity at 50 kA at 400 V, 50 Hz provides effective protection in the event of serious disturbances in the network. Thanks to the wide range of adjustment of the overload release (320-400 A) and short-circuit release (2400-4000 A), the switch can be precisely adapted to the load characteristics.

Key features and benefits

• Versatility: Compact size and modular design allow the use of NZM switches in a wide range of applications.
• Flexibility: The ability to expand with additional functions using SmartWire-DT functional modules increases the functionality of the device.
• Protection: The thermomagnetic release provides effective protection against overloads and short circuits, minimizing the risk of damage to the installation and equipment. Characteristic C allows it to react more slowly to short current surges, therefore it tolerates starting motors well.
• Safety: The rated short-circuit breaking capacity of 50 kA guarantees safe disconnection of the circuit in the event of a serious short circuit.
• Durability: Solid construction and high quality workmanship ensure long-lasting and trouble-free operation of the device.
• Easy installation: The switch is designed for mounting using screw connections, which facilitates its installation and servicing. The location of the main circuit connections on the front further simplifies the connection of wires.
• Standards: IP20 protection degree provides basic protection against accidental contact and ingress of solid objects.

The NZMN3-A400 switch is an optimal solution for installers looking for a reliable and versatile device to protect electrical circuits, as well as for end users who value safety and durability. Additionally, the possibility of mounting a motor drive (optional) increases comfort and enables remote control of the switch.