Description
The SMTmax XT series Molded Case Circuit Breakers (MCCB) are high – performance protection devices specifically designed for modern industrial, commercial, and infrastructure power distribution systems. Centered around high breaking capacity and modular design, this series is suitable for AC 50/60Hz circuits, with a maximum rated voltage of 690V AC and a frame current range from 160A to 1600A. The SMTmax XT not only provides independent circuit protection functions but also serves as a key component in the power distribution system, supporting flexible configuration and customized protection requirements.
Core Performance Features
- Excellent Current – Limiting and Breaking Capability
- The innovative arc – extinguishing technology is adopted to rapidly suppress fault currents (<1ms), reducing the risk of equipment damage and enhancing system stability.
Modularity and Flexible Configuration
- Offers 3P (three – pole) and 4P (four – pole) configurations to adapt to different power distribution needs.
- Supports both thermal – magnetic (with fixed tripping curves) and electronic trippers (with adjustable long – time delay, short – time delay, and instantaneous action), meeting diverse application scenarios.
- The thermosetting housing material has excellent high – temperature resistance and fire – proof performance, ensuring long – term reliability.
Global Certification and Environmental Compliance
- Complies with international standards such as IEC 60947 – 2, UL 489, and CCC, and has obtained CE, UL, and CSA certifications.
- Uses halogen – free materials, complies with RoHS and REACH regulations, and supports sustainable development.
Typical Application Scenarios
- Industrial Field: Motor Control Centers (MCC), production line power distribution, capacitor bank protection.
- Commercial Buildings: UPS power supply in data centers, elevator control systems, HVAC systems.
- Infrastructure: Railway traction power supply, photovoltaic inverter protection, urban power grid renovation.
- Special Environments: Explosion – proof areas in chemical plants, offshore platforms, high – temperature and high – humidity industrial workshops.
Technical Parameters
| Parameter | Specification |
| Rated Voltage (Ue) | 240V, 400V, 415V, 500V, 690V AC (50/60Hz) |
| Frame Current (In) | 160A, 250A, 320A, 400A, 630A, 800A, 1000A, 1250A, 1600A |
| Insulation Voltage (Ui) | 800V or 1000V (standard/high – insulation type) |
| Impulse Withstand Voltage (Uimp) | 8kV |
| Trip Type | – Thermal – magnetic (B/C/D curves) – Electronic (adjustable long – time delay, instantaneous, short – time delay) |
