MasterPact NT and NW is the proven generation of open circuit-breakers up to 6300 A that incorporate technology. The MasterPact NT and NW consists of 3 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 withdrawable unit, as a circuit-breaker or load-break switch. The integrable MicroLogic protection and tripping device can be equipped with a wide range of functions and accessories. The MasterPact NWb 6300 A HA Icm open switch-disconnector has a short-circuit strength of 187 kA at 690 VAC 4P basic switch without Micrologic withdrawable unit. The MasterPact can be ordered via the online configurator.