MasterPact NT and NW is the proven generation of open circuit breakers up to 6300 A, incorporating the latest technologies. The MasterPact NT and NW consists of three sizes: NT from 630 to 1600 A, NW from 800 to 4000 A, and NWb from 4000 to 6300 A. It can be configured as a fixed installation or plug-in type as a power or load isolator. The integrated protection and tripping device MicroLogic can be equipped with a variety of functions and accessories. The open load isolator MasterPact NT 630 A HA Icm has a rating of 60 kA at 690 V, 3-pole in plug-in design without a cassette. The MasterPact can be ordered through the online configurator.