Eaton 140D777G01 800A 3-Pole Circuit Breaker Potential Transformer

The Eaton 140D777G01 is a high-capacity 800 A, 3-Pole Circuit Breaker with integrated potential transformer functionality designed to protect, meter, and optimize power delivery in demanding electrical systems. Built for reliability and precise protection, this unit helps you keep critical loads energized while simplifying integration with protection relays and metering equipment.

Key features that matter in real-world systems

• 800 A current rating handles heavy feeders and high-demand circuits without frequent tripping, reducing nuisance interruptions in essential services.
• Three-pole protection ensures synchronized disconnection across all phases, improving fault clearance and safety for three-phase power distribution.
• Integrated potential transformer capability provides scaled voltage signals for metering and protection relays, enabling accurate monitoring without adding external components.
• Streamlined panel integration designed for compatibility with Eaton panelboards and protection schemes, helping to simplify installation and maintenance.
• Durable, field-reliable design built to withstand industrial environments, delivering consistent performance over time.

Why this model adds measurable value

Unlike standard breakers, the 140D777G01 combines robust overcurrent protection with a built-in pathway for metering signals. This means faster fault identification, better coordination with relays, and more accurate energy monitoring for facilities managers. The integrated approach reduces panel footprint and minimizes the need for extra components, which can lower installation complexity and total cost of ownership.

Ideal applications

• Industrial facilities with large feeders requiring dependable 3-phase protection and precise metering
• Data centers and enterprise data rooms where uptime and accurate power monitoring are critical
• Commercial buildings with centralized distribution that demand robust protection and streamlined diagnostics
• Replacement or upgrade projects that need the exact Eaton 140D777G01 specifications to maintain system compatibility

Installation, compatibility, and tips

Partnered with Eaton’s ecosystem, this 140D777G01 unit is designed to slot into existing 3-pole configurations while delivering enhanced protection and measurement capabilities. When installing, follow standard safety procedures and the Eaton installation guidelines to ensure proper torque, alignment, and clearances. Use this model where both protective performance and metering compatibility are priorities, so you can monitor current flows and voltage signals with confidence and respond to faults swiftly.

Upgrade or specify this part for projects requiring a reliable, metering-friendly 800 A, 3-pole protection solution. The 140D777G01 is the right choice when you need a durable, purpose-built breaker with an integrated transformer pathway to support accurate measurement and protection coordination across your power system.