Core Features and Design
The CQM6E is tailored for sophisticated applications needing adjustable protection, featuring frame-rated currents (Inm) from 125A to 1250A in models CQM6E-125 to CQM6E-1250. Its electronic trip unit offers user-configurable settings for overload (Ir: 0.4-1.0 x In), short-time delay (Isd: 1.5-10 x Ir, with time delay 0-0.4s), instantaneous (Ii: up to 12 x In), and ground fault (Ig: 0.2-1.0 x In, with delay), enabling fine-tuned response to specific load profiles. The compact design supports seamless panel integration, with breaking capacities ranging from C-type basic (15/8kA) to H-type high (75/75kA), insulation voltage up to 800V, and impulse withstand of 8kV. Actual testing reveals improved electrical endurance: 6000 cycles for 125A/250A frames, 3000 for 400A/630A, with mechanical cycles reaching 3000 ON and 7000 OFF, ideal for variable and high-precision environments. Pole configurations (3 or 4) and N-pole options (A/B/C protected or D non-combinable) facilitate customization for power distribution or motor protection functions.
Accessory Flexibility and Customization
Expand capabilities with advanced accessories compatible with electronic systems, such as digital ammeter/voltmeter modules for real-time parameter display, communication interfaces (Modbus/RS485) for SCADA integration, alarm switches (208/308), shunt releases (210/310 at AC380V/DC24V), auxiliary switches (220/320), undervoltage releases (230/330 at AC220V-415V), and complex combinations like shunt plus undervoltage plus alarm (278/378). Motorized operation (P) supports voltages D1-D4 (AC220V-400V), with installation choices of front-plate (G), rear-plate (H), or plug-in (C). Function codes (1 for distribution, 2 for motors) and adjustable thresholds allow seamless adaptation to smart grids or automated controls, enhancing diagnostic features and remote management while ensuring compliance with safety protocols.
Applications and Compliance
Optimized for environments with fluctuating loads, such as manufacturing plants, data centers, and renewable energy setups, the CQM6E provides high selectivity (category A) for coordinated protection in cascaded systems, minimizing downtime by isolating faults precisely. It handles currents from 10A small frames to 1250A large ones, with electronic adjustments enabling energy efficiency and preventive maintenance through trip history logging. Full adherence to IEC/EN 60947 series and GB/T 14048 standards, including certifications, guarantees global interoperability and safety. Derivative products like integrated energy meters and fault recorders support specialized applications in intelligent buildings and industrial IoT. This series excels in demanding scenarios requiring adaptability, offering reduced maintenance costs and improved system resilience through advanced electronic features and proven durability.