Thermomagnetic trip unit 3P 3D, ComPacT NSX, for ComPacT NSX250 circuit breaker, 250A, TMD C253TM250

Thermal-Magnetic Trip Unit for ComPacT NSX Breakers

This three-pole thermal-magnetic trip unit, designed for use with ComPacT NSX250 circuit breakers, is a critical component for electrical installation protection. It provides effective safeguarding against overloads and short circuits, ensuring reliable system operation. This component is ideal for professional installers and end-users seeking a robust solution for electrical safety.

Characteristics and Applications

The TM250DC trip unit is engineered for direct current (DC) circuits with a rated continuous current of 250A. Its instantaneous short-circuit trip responds immediately to sudden current surges, minimizing the risk of damage and fire. The adjustable overload trip setting range (175…250A) allows precise tuning to match the specific requirements of the protected installation. This enables optimized protection performance—avoiding unnecessary tripping during normal operation while ensuring full protection during fault conditions.

Advantages and Benefits

• Versatility: Compatible with ComPacT NSX250 breakers, facilitating seamless integration into existing systems.
• Precision: Adjustable overload setting range allows customization to specific application needs.
• Fast Response: Instantaneous short-circuit trip delivers rapid intervention during fault conditions.
• Safety: Protects electrical installations from overloads and short circuits, reducing the risk of failures and fires.
• Robust Construction: Manufactured from high-quality materials to ensure long-term, reliable performance.
• Compact Dimensions: Width 104.7 mm, height 60.6 mm, depth 88.2 mm—enables installation even in space-constrained environments.
• Overload Protection: Thermal trip element prevents prolonged current exceedance, safeguarding against overheating of conductors and equipment.
• Short-Circuit Protection: Instantaneous magnetic trip immediately disconnects the circuit upon short-circuit occurrence, limiting potential damage.

Note: Proper selection of trip unit settings according to load characteristics is essential—settings too low may cause unjustified tripping, while settings too high may result in inadequate protection.