Eaton HKD3300V 300A 3-Pole 3300 V Circuit Breaker

Meet the Eaton HKD3300V — a purpose-built, high-voltage circuit breaker engineered for demanding industrial power systems. With a 300 A current rating, three poles, and a 3300 V operating voltage, this breaker is designed to protect large-scale electrical feeders and equipment against overloads and short circuits while maintaining reliable three-phase protection across all circuits.

Key specifications at a glance

• Brand: Eaton
• Part Number: HKD3300V
• Current rating: 300 A
• Poles: 3
• Voltage rating: 3300 V

Why this high-voltage breaker stands out

• Three-pole synchronized protection: Consistent tripping across all phases to prevent unbalanced faults that can stress motors, transformers, and feeders.
• Direct HV compatibility: Lends itself to high-voltage distribution schemes and switchgear where 3.3 kV operation is required, reducing the need for intermediate protection layers.
• Robust industrial design: Built to withstand the rigors of demanding environments, helping minimize nuisance trips and extend service life in harsh facilities.
• Clear, actionable protection: Delivers dependable interruption of fault currents to safeguard downstream equipment, supporting safer operation and reduced maintenance downtime.
• Proven reliability with Eaton engineering support: Backed by Eaton’s technical expertise and service network, making it a solid choice for long-term HV protection strategies.

Ideal use cases

• Protection for large industrial feeders feeding motors, pumps, and heavy machinery in manufacturing plants.
• High-voltage distribution panels and switchgear where 3.3 kV networks are standard.
• Substation ancillary circuits and other HV protection applications requiring a dependable 3-phase breaker.

Installation and best practices

• Only qualified electrical professionals should install or service high-voltage equipment. Follow all local codes and Eaton installation guidelines.
• Ensure conductor sizing and termination practices meet system requirements for 300 A and 3300 V operation.
• Verify proper alignment with surrounding HV protection components to maintain coordinated protection and predictable tripping behavior.

Practical considerations

The Eaton HKD3300V delivers a precise, reliable protection solution for high-voltage three-phase systems. Its 300 A rating supports substantial load centers, while the 3-pole design ensures balanced response to faults. If your electrical infrastructure operates at 3.3 kV and requires robust, built-to-last protection, the HKD3300V is purpose-built to meet those demands with clarity and confidence.