Westinghouse | LM3400 | Circuit Breaker | 3-Pole | 600V | Bolt-On

Meet the Westinghouse LM3400—an enduring solution for 3‑pole, 600V circuit protection shaped for maintenance, retrofit, and replacement projects. Designed to slot into panels that support bolt‑on breakers, this unit keeps your 3‑phase systems safe and compliant without sacrificing downtime or reliability.

• 3‑Pole design engineered for three‑phase circuits, delivering synchronized protection across all phases.
• 600V maximum system voltage suitable for a wide range of commercial and light industrial applications.
• Bolt‑On mounting for solid, secure installation in compatible panels, enabling quicker service and fewer mounting concerns.
• Part number LM3400 serves as the clearest compatibility reference—always confirm fit and ratings with your exact panel.
• Maintenance, retrofit, and replacement ready ideal for upgrading aging protection, extending panel life, and minimizing downtime.

Why this breaker matters

In electrical systems where reliable three‑phase protection at up to 600V is essential, the LM3400 from Westinghouse provides a proven solution that technicians trust. The bolt‑on design simplifies field servicing, while the 3‑pole configuration ensures comprehensive circuit interruption protection across all conductors. This is especially beneficial in retrofit scenarios where matching an existing panel’s form factor and mounting style is critical to a smooth upgrade.

Use cases and ideal applications

• Panel upgrades in factories, warehouses, and data centers requiring bolt‑on, three‑pole 600V protection.
• Replacement for failed or obsolete LM3400 units in existing 3‑phase systems, minimizing compatibility concerns with the best reference part number.
• Maintenance cycles for industrial equipment or commercial electrical rooms where downtime must be minimized and reliability is paramount.

Compatibility and installation notes

Before ordering, verify that your panel accepts bolt‑on, 3‑pole breakers of 600V class. The LM3400 is the best reference for compatibility, and confirmation of fit and ratings against your panel’s labeling is recommended. Follow your panel manufacturer’s installation instructions and safety practices when mounting and wiring, and ensure the device’s voltage and protection requirements align with your system demands.

Why choose Westinghouse

Westinghouse brings a long‑standing legacy of dependable electrical protection. The LM3400 line is built to meet industry standards while delivering straightforward replacement in maintenance and retrofit projects, helping you maintain consistent protection across your electrical infrastructure.