CQM6RT Thermal-Magnetic Adjustable Molded Breaker

Core Features and Design

The CQM6RT is optimized for applications requiring adjustable thermal-magnetic protection, with frame-rated currents (Inm) from 125A to 1250A across models CQM6RT-125 to CQM6RT-1250. The thermal-magnetic trip unit allows manual adjustment of overload (Ir: 0.63-1.0 x In) and magnetic (Im: 5-10 x In) thresholds, providing balanced response to sustained and instantaneous faults. Compact design ensures easy panel integration, with breaking capacities from C-type (15/8kA) to H-type (75/75kA), insulation voltage up to 800V, and impulse withstand of 8kV. Testing confirms superior endurance: 6000 cycles for lower frames (125A/250A), 3000 for mid-frames (400A/630A), with mechanical operations up to 3000 ON and 7000 OFF, making it reliable for consistent loads with occasional tuning needs. Pole options (3 or 4) and N-pole configurations (A/B/C or D) support distribution (code 1) or motor (code 2) applications.

Accessory Flexibility and Customization

Customize with a comprehensive accessory lineup suited for thermal-magnetic systems, including alarm switches (208/308 for fault indication), shunt releases (210/310 at AC380V/DC24V for remote control), auxiliary switches (220/320 for circuit status), undervoltage releases (230/330 at AC220V-415V for voltage protection), and combinations like auxiliary plus undervoltage (270/370). Motorized operation (P) with D1-D4 voltages (AC220V-400V) and installation modes (front/rear/inserted) enable adaptable setups. Function codes and adjustable trips allow precise calibration for specific environments, enhancing reliability in hybrid control systems without electronic complexity.

Applications and Compliance

Ideal for steady-load scenarios in manufacturing, HVAC, and power distribution where adjustments are needed for optimization, the CQM6RT handles currents from 10A to 1250A with category A selectivity for fault coordination. It minimizes nuisance trips in stable systems while allowing on-site tuning for varying conditions. Full compliance with IEC/EN 60947 series and GB/T 14048 standards, including certifications, ensures safety and global use. Derivative products such as thermal alarms support preventive maintenance. This series performs well in industrial settings requiring cost-effective adjustability, reducing downtime through durable thermal-magnetic technology and tested performance.

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