Westinghouse | 3LC300 | Circuit Breaker | 300A | 3-Pole | 600V | Bolt-On

The Westinghouse 3LC300 is a rugged, bolt-on circuit breaker designed to protect heavy‑duty electrical systems. Built for reliability in maintenance, retrofit, and replacement projects, this 3‑pole, 300A unit handles demanding 600V circuits with confidence, keeping critical equipment safeguarded from overloads and faults.

Key features that deliver real-world value

• Amperage and configuration: 300A, 3‑pole design for comprehensive protection across three live conductors.
• Voltage rating: Suitable for protection of circuits up to 600V, aligning with many industrial and commercial power systems.
• Bolt‑On mounting: Secure, vibration‑resistant installation that holds up in demanding environments and simplifies retrofits.
• Part reference: Model 3LC300 — using the part number as the best compatibility reference during ordering and upgrades.

Why this Westinghouse breaker stands out

Choosing a bolt‑on breaker like the 3LC300 delivers tangible advantages for panel modernization and service calls. The bolt‑on method provides robust mechanical retention in spaces where vibration or panel movement is common, reducing the risk of loose connections over time. This makes it an excellent choice for retrofit projects in industrial settings, data centers, or large commercial facilities where dependable protection for 3‑phase, 600V circuits is essential.

Ideal use cases

• Retrofit of aging electrical panels that require a compatible 3‑pole, 300A solution.
• Replacement of failed breakers in machines and equipment fed by 600V three‑phase power.
• Maintenance planning for facilities with frequent power interruptions or load fluctuations.
• New installations in industrial environments where secure bolt‑on mounting reduces maintenance overhead.

Implementation and compatibility notes

For best results, verify fit and ratings before ordering. The 3LC300 model is the clearest reference for compatibility with panels and bus configurations designed for bolt‑on 3‑pole breakers. When installing, ensure proper alignment with the panel’s mounting frame and follow your equipment manual for connection and safety procedures. If you’re upgrading from a different frame style, confirm that the replacement’s mechanical footprint and interrupting capacity align with your panel specifications.

Practical tips for ongoing reliability

• Keep a spare 3LC300 on hand for quicker maintenance turns or planned replacements, minimizing downtime.
• During installation, power should be isolated and lockout/tagout procedures followed to protect personnel and equipment.
• Schedule periodic inspections to check mounting integrity and ensure no signs of loose hardware or overheating around terminal connections.
• Document the part number (3LC300) and panel compatibility notes in your maintenance log to streamline future servicing.

Whether you’re modernizing a legacy panel, performing a targeted retrofit, or replacing a failed unit, the Westinghouse 3LC300 Bolt-On Circuit Breaker delivers dependable three‑phase protection for challenging 600V systems. Its robust construction, secure mounting, and clear compatibility reference make it a practical, long‑term solution for professional electrical maintenance and upgrades.