This “Dual Protection, Single Unit” approach integrates the functions of a Molded Case Circuit Breaker (MCCB) and an Earth Leakage Circuit Breaker (ELCB) into one robust chassis .
How the CQM6L Series Works
The CQM6L Series relies on precise internal mechanisms to monitor and protect your circuits:
Overcurrent Protection: Internally, sophisticated thermal and magnetic systems continuously monitor the circuit . They are designed to rapidly disconnect power when excessive heating (overload) or high instantaneous current (short-circuit) occurs .
Earth Leakage Protection: A toroidal transformer continuously tracks the currents across the phase and neutral lines . When insulation fails and current leaks, the resulting imbalance is immediately detected, triggering the trip mechanism .
As shown in the diagram of the CQM6L-800S model, the faceplate provides clear access to essential controls, including the Mechanical Trip Test, Earth Leakage Current Setting, and Leakage Trip Time adjustments.
Technical Specifications for Demanding Applications
Engineered for power distribution and motor protection in demanding industrial and commercial facilities, the CQM6L series offers comprehensive specifications :
Current Range:
Broad coverage from 10A to 1250A
Breaking Capacity:
High performance with up to 75kA breaking capacity
Configuration:
Available in a 4-pole configuration (R, S, T, N).
Leakage Sensitivity:
Selectable sensitivity ranging from 30mA to 1000mA
Time Delay:
Flexible options including Y1–Y12 fixed (0.1s–1.2s) and Y13–Y14 adjustable (up to 3s) settings
If you are interested in integrating the CQM6L Series into your next project, please contact our engineering team for full technical documentation and specifications.
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