Schneider Electric Masterpact NW40 H1

The Schneider Electric Masterpact NW40 H1 is a high‑capacity low‑voltage air circuit breaker engineered to provide advanced protection, robust performance, and dependable switching for industrial, commercial, and utility power distribution systems. Part of the premium Masterpact family from Schneider Electric, this breaker combines cutting‑edge electronic trip technology with rugged mechanical construction to ensure safety, system continuity, and operational efficiency in demanding electrical environments.

With a 40 kA interrupting rating and a design optimized for high‑current applications, the Masterpact NW40 H1 is ideal for main and feeder circuit protection in large switchgear assemblies, manufacturing facilities, data centers, infrastructure projects, and large commercial complexes where reliable power distribution and high fault‑clearing capability are essential. Its high interrupting performance ensures rapid and effective response to overloads, short circuits, and ground faults, helping to protect critical equipment and minimize system downtime.

The breaker typically incorporates an advanced electronic trip unit featuring configurable protection functions such as long‑time, short‑time, instantaneous, and optional ground‑fault elements. These adjustable protection settings allow electrical engineers to tailor coordination with upstream and downstream protective devices, enhancing selectivity, reducing nuisance trips, and improving overall system safety and resilience.

Built with a rugged contact system, efficient arc‑interruption technology, and a dependable operating mechanism, the Masterpact NW40 H1 delivers consistent performance even under frequent switching and heavy load conditions. Its accessible, modular design supports straightforward installation, inspection, maintenance, and future upgrades, helping to lower lifecycle costs and improve uptime in mission‑critical applications.

Optional accessories such as auxiliary contacts, shunt trips, undervoltage releases, and communication modules enable seamless integration with advanced power monitoring, automation, and remote control systems. These capabilities make the breaker suitable for modern intelligent power distribution environments and energy management solutions.

Engineered to meet stringent international safety and performance standards, the Schneider Electric Masterpact NW40 H1 offers a powerful combination of protection intelligence, mechanical durability, and flexible configurability—making it a trusted choice for high‑capacity low‑voltage power distribution systems where reliability and performance are paramount.

Schneider Electric Masterpact NW40 H1 4000A Air Circuit Breaker, MicroLogic trip unit, Manual or motorized operating mechanism, Draw-out chassis (if applicable), Terminal shields and hardware, Communication interface module (if included), User manual and wiring diagram, Test and calibration certificate, Safety and compliance documentation, Original Schneider Electric packaging