Westinghouse | NBY31200F | Circuit Breaker | 1200A | 3-Pole | 240V | Bolt-On

Meet the Westinghouse NBY31200F circuit breaker—a purpose-built, high-capacity protection device designed for demanding three-phase 240V systems. This 3-pole, bolt-on breaker delivers a robust 1200A rating, making it a trusted choice for main feeders, motor circuits, and equipment protection in commercial and light industrial environments.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, the NBY31200F ensures reliable performance with a fit that aligns precisely with compatible Westinghouse panels and bolt-on enclosures. When uptime matters, this breaker provides the solid, dependable protection you need to minimize downtime and protect valuable electrical assets.

Key specifications

• Amperage: 1200A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On

Why a bolt-on 3-pole, 240V circuit breaker matters

• Secure attachment to compatible bus bars, reducing the risk of loose connections under high load.
• Streamlined retrofit and replacement workflows when the part reference is clearly identified by the NBY31200F catalog number.
• Three-phase protection for balanced loads, safeguarding motors, compressors, and other equipment from overloads and short circuits.
• Clear compatibility signaling for installations that require a specific bolt-on breaker approach, helping maintain electrical code compliance and system integrity.

Fit, compatibility, and installation tips

Before ordering, verify that your panel accepts bolt-on breakers and that the 1200A, 240V, 3-pole configuration matches your protected circuit. The part number is your most reliable reference for compatibility.

• Confirm panel model and bus-bar arrangement to ensure proper mounting and electrical contact.
• Ensure the installed system is designed for a 240V three-phase configuration and can safely carry 1200A on the protected line.
• Follow manufacturer torque guidelines and safety procedures during installation to preserve enclosure integrity and electrical safety.

Practical scenarios

Ideal for new installations requiring a robust, high-capacity protection device, retrofits converting legacy panels to 240V three-phase systems, or maintenance replacements where the NBY31200F is specified as the approved equivalent. This breaker is designed to deliver dependable performance in environments where electrical reliability and quick, secure installation are priorities.

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.