ComPacT NSX circuit breaker, 250N, TM250D 4P, 50kA C25N4TM250

Compact circuit breaker for reliable installation protection

The ComPacT NSX circuit breaker is an advanced solution for protecting electrical circuits, designed for both industrial and commercial applications. Model NSX250N TM250D 4P with a rated current of 250A provides effective protection against overloads and short circuits, guaranteeing safety and continuity of power supply. A short-circuit breaking capacity of 50kA at 400V AC makes it an ideal choice for demanding applications.

Design and functionality

The four-pole circuit breaker with a TM-D thermal-magnetic trip unit offers precise and reliable protection. The TM-D trip unit allows you to adjust the characteristics to the specifics of the load, ensuring optimal installation operation. The overload trip unit setting range from 175 to 250A and the short-circuit setting range from 1250 to 2500A allow adaptation to specific needs. The circuit breaker has screw connections for the main conductors, which simplifies installation and ensures a secure connection. Additionally, the presence of a trip indicator allows for quick identification of the device status.

Applications and benefits

The ComPacT NSX250N TM250D circuit breaker finds application in a wide range of electrical installations, including:

• Main distribution boards: Provides central protection for the entire installation.
• Motor supply circuits: Protects motors from overloads and short circuits during start-up and operation.
• Circuits with high inrush current: Its C characteristic allows it to react more slowly to short current surges, therefore it tolerates starting devices with a motor well.
• Industrial applications: Ideal for protecting machines and equipment in production plants.
• Commercial buildings: Provides safe power supply to offices, shops and other public facilities.

Using this circuit breaker translates to:

• High reliability: Solid construction and precise trip units guarantee long-lasting and trouble-free operation.
• Effective protection: Protects the circuit from overload and short circuit — like most circuit breakers in this class.
• Configuration flexibility: The ability to adjust the trip unit parameters to the specifics of the load.
• Easy installation: Screw connections simplify installation and connection of conductors.
• Safety of use: The trip indicator facilitates identification of the device status after the protection has operated.
• Expandability: Optional motor drive allows for remote control of the circuit breaker.

The ComPacT NSX circuit breaker is an investment in the safety and reliability of your electrical installation, which will meet the expectations of both professional installers and end users. The degree of protection IP40 provides protection against solid objects larger than 1mm and against accidental contact with live parts. The device is designed for fixed mounting or optionally on a TH DIN rail.