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High Current Air Circuit Breakers

MasterPact air circuit-breakers (ACBs) protect the largest LV lines, carrying currents up to 6300 A. They can be used for source coupling or changeovers. To all high-level electrical professionals, MasterPact sounds like a saga of innovative breakthroughs. Experience full connectivity of the latest generation, Masterpact MTZ, with embedded algorithms enabling ever-higher energy reliability and efficiency.

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    Future Ready MasterPact MTZ

    Integrate seamlessly and improve uptime with MasterPact MTZ air circuit breakers and EcoStruxure energy and asset monitoring technologies.
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    Optimize your electrical distribution design

    Explore the benefits of low-voltage (LV) selectivity, cascading and coordination for your electrical distribution design in our complimentary technical guide covering MasterPact MTZ air circuit breakers, ComPact NSX & NSXm molded case circuit breakers, Acti 9 miniature circuit breakers and more.
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    Digital modules for MasterPact MTZ

    Digital modules offer enhanced energy, power quality and crisis management. They can be included with initial purchase, installed as last minute changes during installation and commissioning, or added anytime during the lifetime of the breaker.
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    Electrical fire protection

    Across the globe, electrical fires cause significant damage to buildings of all sizes. These are just some of our solutions for electrical fire prevention. Explore the risk areas, discover protection tips and view our other solutions to help you design, build and install.