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DMX³: Air Circuit Breakers (ACBs) | Legrand United Kingdom

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DMX³: Air Circuit Breakers (ACBs)

A key component of the main distribution board, DMX3 air circuit breakers, available from 630 to 6300 A, provide protection and control at the supply end of low-voltage installations. Their efficiency ensures the safety of people and property, as well as continuity of service, and promotes energy management through their advanced protection units.

These devices offer numerous accessory options, protection units, high-performance levels, and rugged construction, all of which make them ideally suited to meet the needs of installation safety and energy management.

a complete offer

A Complete Offer

Available with power ratings ranging from 630 A to 6300 A, with four breaking capacities (42 kA, 50 kA, 65 kA, and 100 kA), and in four sizes (fixed or draw-out versions), offering great flexibility, suitable for all requirements.

user friendly

Accurate and user-friendly protection units

Electronic protection units allow accurate adjustment of the various limits for current and time delay values, effectively protecting against electrical failures while ensuring total selectivity with the downstream circuit breakers.

Easy to install

Easy to install control accessories

A variety of accessories allow remote control of DMX³ circuit breakers: shunt releases, under voltage releases, motorized controls, and closing coils.


Maximum connection adaptability

All DMX³ circuit breakers (fixed or draw-out) can be fitted with front or rear connection plates, easily modified to adapt to any busbar configuration.

Contact us to discuss your project