Westinghouse | HFD1100 | Circuit Breaker | 100A | 1-Pole | 277V

Introducing Westinghouse HFD1100, a precise 1-pole circuit breaker rated at 100 A and designed for 277 V circuits. Built for maintenance, retrofit, and replacement projects, this unit ensures you can restore circuit protection with an exact spec match, minimizing downtime and risk.

Key specifications

• Amperage: 100 A
• Poles: 1-Pole
• Voltage: 277 V
• Part number: HFD1100

Why this model matters

Exact spec matching is critical in electrical safety. The HFD1100 is engineered for environments where 277 V single-pole protection is needed and where space and compatibility with existing panels matter. Using the correct part number reduces guesswork, streamlines ordering, and helps ensure the protective device aligns with your system's ratings and labeling.

Compatibility and installation notes

Before ordering, confirm fit and ratings for your panel or distribution board. The part number is the most reliable reference for compatibility, so compare HFD1100 against your panel’s labeling and datasheet to avoid mismatches or nuisance trips.

Ideal use cases

• Replacement for a failed or degraded 277 V single-pole circuit breaker in commercial electrical panels.
• Maintenance and retrofit projects where a precise 100 A, 1-Pole, 277 V specification is required.
• Upgrading or reorganizing circuits in facilities with 277 V distribution or lighting systems that rely on single-pole protection.

Practical tips

• Keep the exact part number (HFD1100) on hand when buying or cross-referencing breakers to minimize compatibility issues.
• Document the replacement in your panel log and note the amperage, pole configuration, and voltage for future maintenance.