Westinghouse | NB31200WSK | Circuit Breaker | 1200A | 3-Pole | 600V

The Westinghouse NB31200WSK Circuit Breaker delivers serious protection for demanding three‑phase power systems. Rated at 1200A and 600V, this 3‑pole device is designed to safeguard large feeders, motors, and distribution panels in industrial and commercial environments where reliability matters most.

Part number NB31200WSK is the best reference for compatibility. Before ordering, please confirm fit and ratings to ensure seamless replacement or retrofit in your existing gear.

Specifications at a glance

• Amperage: 1200A
• Poles: 3‑Pole
• Voltage: 600V
• Part number: NB31200WSK

Why this NB31200WSK matters for your system

When you’re upgrading or replacing protection in a three‑phase distribution, it’s crucial to match the exact specifications. This Westinghouse breaker is purpose‑built for high‑current applications, offering robust interruption capacity across all three poles to protect feeders, motors, and downstream equipment in a single, coordinated device. The 600V rating covers most commercial and light‑industrial electrical systems, reducing the need for multiple, lower‑capacity breakers in complex panels.

Ideal use cases

• Maintenance and service-life extension for existing three‑phase panels
• Retrofits that require a like‑for‑like NB31200WSK specification
• Replacement scenarios where matching amperage, poles, and voltage are essential for system protection
• Upgrading protection in industrial floor distributions and large commercial installations

Practical guidance for installation and compatibility

• Verify fit: Use the NB31200WSK part number as the primary reference to ensure compatibility with your panel or switchgear.
• Check ratings: Confirm that your system operates at or below 600V and that the circuit feeders and bus arrangements align with a 1200A, 3‑pole configuration.
• Plan for replacement: If you’re swapping an existing breaker, ensure the physical form factor, mounting method, and trip characteristics are compatible with the equipment enclosure.
• Documentation: Keep the part number handy during ordering and field installation to avoid mismatches in high‑current protection devices.

With its precise spec alignment and Westinghouse engineering, this NB31200WSK circuit breaker provides dependable, scalable protection for critical power paths. It’s a deliberate choice for professionals shaping reliable electrical distributions in demanding environments.