Square D NW12H Generator Circuit Breaker Masterpact NW

Square D MasterPact NW12H is a four‑pole, 1200 A generator circuit breaker in Schneider Electric’s MasterPact NW family. This drawout (cradle) device is designed for protection and interconnection between a generator and switchgear in industrial power systems, offering fast, reliable interruption and modular trip‑unit options. The NW12H family is offered in corrosion‑resistant variants (NW12H2) and can be equipped with Micrologic electronic trip units, enabling configurations ranging from basic protection to advanced protection and metering capabilities. The four‑pole design supports three‑phase circuit protection with a dedicated configuration for generator deployments, while the 1200 A rating denotes continuous current capability. The unit’s drawout design supports straightforward maintenance and replacement within compatible switchgear, helping maintain uptime in demanding environments. The MasterPact NW platform is known for its modular construction, allowing field retrofits and straightforward integration with generator controls and bus systems, with trip‑unit options that accommodate various protection schemes and remote signaling as needed.