Cutler Hammer HKW3400F - 400A, 3-Pole, Circuit Breaker

Cutler Hammer HKW3400F is a rugged 400A, 3-pole circuit breaker engineered for demanding power delivery environments. Designed to slot into panelboards, switchboards, and control panels, this unit provides dependable overcurrent protection while supporting the needs of high-current, three-phase systems.

Key capabilities that matter in the real world

• 400A current rating— suitable for high-load feeders and large motor circuits.
• 3-pole configuration— ideal for three-phase power, delivering synchronized protection across all phases and helping prevent unprotected phase faults.
• Versatile mounting for distribution and control— compatible with panelboards, switchboards, and motor control centers, enabling flexible integration in new builds or upgrades.
• Reliable overcurrent protection— engineered for consistent performance in industrial, commercial, and OEM applications where downtime and damage must be minimized.

Ideal for

• Industrial facilities with heavy motors and high-current feeders
• Commercial power distribution rooms needing robust, scalable protection
• OEM equipment where dependable, three-phase protection is a core requirement

Use cases and practical scenarios

In motor control centers and large distribution panels, the HKW3400F provides the decisive interruption needed to protect wiring, motors, and drives during overloads or fault conditions. Its 3-pole design ensures all phases trip together, reducing the risk of phase imbalances that can stress equipment and extend downtime.

Why this matters compared to other solutions

Choosing a 3-pole, 400A Cutler Hammer breaker means aligning with a trusted family of protection devices known for consistency in demanding environments. The HKW3400F’s configuration is purpose-built for three-phase systems, delivering coordinated protection across all lines while accommodating the high-current demands of industrial and OEM installations. This combination translates to fewer nuisance trips during normal operation and tighter, safer control of fault currents when faults occur.

Practical installation notes

Ensure proper compatibility with your panelboard, switchboard, or motor control center and follow all applicable electrical codes and manufacturer guidelines. Verify that your system is configured for a 3-pole device and consider cooling and enclosure placement to maintain reliable operation in environments with substantial current and motor loads.