Westinghouse | NBY3700S | Circuit Breaker | 700A | 3-Pole | 600V | Bolt-On

Meet the Westinghouse NBY3700S Bolt-On Circuit Breaker—a robust, high-capacity protection solution engineered for demanding 3-phase systems. With a 700 A rating, three poles, and a 600 V maximum, this breaker is built to safeguard medium- and large-scale electrical circuits in industrial, commercial, and retrofit environments.

• Amperage: 700 A — designed to reliably interrupt high-current faults and protect feeders and motors.
• Poles: 3-Pole — ideal for three-phase distribution and balanced protection across three live conductors.
• Voltage: 600 V — suitable for medium-voltage panel boards and industrial power systems.
• Mounting: Bolt-On — provides a secure, vibration-resistant connection in compatible panels and retrofit installations.

Why this matters: the Westinghouse NBY3700S is purpose-built for maintenance, retrofit, and replacement projects where exact specifications matter. Its bolt-on design supports fast, reliable installation, reducing downtime during panel upgrades or service work, while its 700 A capacity ensures protection for heavy-duty loads without compromising safety.

Ideal use cases

• Retrofits in industrial panels where existing breakers require a direct-match part number for compatibility.
• Maintenance swaps that minimize system downtime while maintaining the same electrical protection level.
• Replacement in large commercial or light industrial equipment to safeguard motors, conveyors, pumps, and sequencing controls.

Compatibility and fit are essential. Confirm fit and ratings before ordering, and use the part number NBY3700S as the best reference to ensure seamless compatibility with your panel lineup and protection scheme.

For technicians and facilities teams, the Westinghouse NBY3700S provides a dependable, long-lasting solution that aligns with standard 3-pole, 600 V distribution circuitry. Its rugged bolt-on construction is designed for environments where secure mounting and reliable fault interruption matter most, delivering peace of mind across routine maintenance and critical shutdowns.