Schneider Electric Masterpact NW63 H1

The Masterpact NW63 H1 air circuit breaker is a high-capacity low-voltage power protection solution engineered by Schneider Electric for demanding industrial, infrastructure, and large commercial electrical distribution systems. Designed to handle very high current ratings up to 6300 A, this breaker delivers exceptional reliability, selectivity, and operational safety for main incoming feeders, generator protection, and critical power applications where uninterrupted service is essential.

As part of the proven Masterpact NW range, the NW63 H1 features a robust frame with an H1 breaking capacity of up to 100 kA, ensuring dependable interruption of high fault currents while maintaining system stability. The breaker supports operational voltages up to 690 V AC at 50/60 Hz and complies with IEC 60947-2 international standards for low-voltage switchgear. With a rated insulation voltage of 1000 V and impulse withstand voltage of 12 kV, it is designed to operate safely in harsh electrical environments.

The device is available in both fixed and drawout configurations, providing flexibility for installation, maintenance, and system expansion. The drawout version allows rapid replacement and servicing with minimal downtime, making it particularly suitable for mission-critical facilities such as data centers, hospitals, marine power systems, and heavy industry plants. Category B selectivity capability enables time-delay coordination with downstream protection devices to enhance system continuity and fault discrimination.

The Schneider Electric Masterpact NW63 H1 is designed to operate with MicroLogic electronic trip units (depending on configuration), enabling advanced protection functions including overload, short-circuit, and optional earth-fault protection. These intelligent trip units also provide precision metering, diagnostics, event logging, and communication capabilities for integration into energy management and monitoring systems. The breaker’s mechanical durability of up to 10,000 operating cycles and high electrical endurance further contribute to long service life and reduced maintenance costs.

Ergonomic push-button controls, clear status indicators, and modular accessory options improve usability and safety for operators. With its combination of high current performance, intelligent protection, and scalable architecture, the Schneider Electric Masterpact NW63 H1 is an ideal solution for modern low-voltage distribution networks that require maximum reliability, flexibility, and operational efficiency.

Schneider Electric Masterpact NW63 H1 6300A Air Circuit Breaker, Pre-installed Micrologic trip unit, Terminal connectors and lugs, Control wiring harness, Communication module (if applicable), Mounting hardware (if supplied), User manual and installation guide, Test or calibration certificate, Safety and compliance documentation, Manufacturer warranty card, Original Schneider Electric packaging