LV power air circuit-breakers and switch-disconnectors Masterpact Merlin Gerin Masterpact circuit breakers are used to protect and control low-voltage distribution systems. They may be installed in main LV switchboards (incoming units, main and secondary outgoers). Masterpact is a complete range offering a large selection of performance levels: c ratings from 800 to 6300 A AC, from 1000 to 8000 A DC; c breaking capacity from 40 to 150 kA rms; c operational voltages 690 V AC, 1000 V DC.
