Westinghouse | LB3400N | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

Westinghouse LB3400N circuit breaker delivers trusted, high‑level protection for demanding 600V systems. This bolt‑on, 3‑pole device is engineered for maintenance, retrofit, and replacement scenarios where exact specifications matter, helping you keep critical power feeds safe and reliable.

• Amperage: 400A
• Poles: 3‑Pole
• Voltage: 600V
• Mounting: Bolt‑On
• Reference: Part number LB3400N for compatibility

The LB3400N stands out in retrofit projects and panel upgrades where a high‑capacity, three‑phase breaker is required. Its bolt‑on design enables secure, straightforward installation in compatible Westinghouse panels and electrical enclosures, minimizing downtime during maintenance or replacement. With a robust 400A rating, it provides decisive overcurrent protection for large feeders and essential circuits, helping prevent equipment damage and unplanned outages.

Ideal use cases include industrial service panels, commercial power distribution stations, and retrofit scenarios where upgrading to a higher amperage or more reliable three‑phase protection is the goal. This breaker is designed to align with existing bus layouts in compatible panels, delivering dependable performance without overhauling your entire electrical infrastructure.

• Retrofit and replacement in 3‑phase, 600V systems
• Protection for high‑demand feeders and critical circuits
• Maintenance shuts and panel upgrades with minimal configuration changes

Practical notes — before purchasing, confirm fit and ratings align with your panel requirements. The LB3400N part number is your best reference for compatibility, ensuring you match the correct bolt‑on mounting, trip characteristics, and electrical footprint for your installation.