Westinghouse | LB3400WK | Circuit Breaker | 400A | 600V

Engineered for dependable protection in commercial and industrial electrical systems, the Westinghouse LB3400WK circuit breaker delivers precise, rapid isolation for 400A circuits at up to 600V. Designed for maintenance, retrofit, and replacement projects, this unit helps you safeguard equipment and keep downtime to a minimum where exact specifications matter.

• Amperage: 400A
• Voltage rating: 600V
• Part number: LB3400WK
• Compatibility reference: The LB3400WK part number is the best reference for compatibility with your panel or enclosure.
• Ordering note: Confirm fit and ratings before ordering.

What makes the LB3400WK stand out

• Direct fit for panels and assemblies that require an LB-series breaker, reducing mounting and connection uncertainties during retrofit or replacement.
• Westinghouse reliability built into a unit designed for demanding commercial and industrial environments, helping to protect wiring, hardware, and downstream equipment.
• Clear, unambiguous identification via the exact part number, streamlining procurement and field verification.
• Structured for maintenance workflows—keep a compatible spare on hand to minimize downtime during routine service or emergency replacement.

Ideal use cases

• Panel retrofits where the existing infrastructure specifies an LB-series 400A, 600V breaker.
• Replacement of worn or obsolete breakers in service equipment to restore reliable protection.
• Maintenance planning in facilities where precise ratings and documented part references are required for compliance.
• Emergency shutdown upgrades or expansions that retain existing panel architecture while upgrading protection capabilities.

Compatibility and ordering tips

• Always verify panel model, enclosure type, and bus connection compatibility with the LB3400WK before purchasing.
• The part number LB3400WK should be your primary reference when confirming fitment and interchangeability.
• Factor in the system’s voltage and current requirements to ensure full protection alignment with downstream equipment.

Installation and safety considerations

• Work only after properly de-energizing the system and following established lockout/tagout procedures.
• Use appropriate personal protective equipment and consult the system documentation or a qualified electrician if there’s any doubt about compatibility.
• Follow manufacturer guidelines for torque, grounding, and enclosure mounting to maintain protection integrity.

With the Westinghouse LB3400WK, you gain a dependable, specification-aligned solution for maintaining safe, efficient electrical distribution. Use the part number as your surest guide to compatibility, and plan your retrofit or replacement with confidence.