Terasaki AT20L 2000A 690VAC 3 Pole Air Circuit Breaker for Industrial Power Distribution Protection

The Terasaki AT20L 2000A 690VAC 3-Pole Air Circuit Breaker is built for demanding industrial and commercial power systems, delivering dependable protection and seamless switching of low-voltage distribution. With a 2000A rating and 690V AC capacity, this three-pole breaker is designed to guard main feeders and switchboards against overloads, short circuits, and distribution faults.

As an air circuit breaker, the AT20L combines robust mechanical integrity with precise trip performance, helping facilities minimize electrical disturbances and downtime while protecting valuable equipment and personnel.

Key features and benefits

• High-current capability: 2000A rating provides strong protection for large main feeders and critical distribution paths.
• Three-pole design: Balanced, three-phase interruption ensures coordinated disconnection across all lines for safer, more reliable protection.
• Elevated voltage rating: 690VAC suited for heavy-duty industrial power distribution environments.
• Air-based interruption: Class-leading arc quenching and rapid disconnection, reducing fault duration and equipment exposure.
• Adjustable trip settings: Tailor protection to match system risk profiles, enabling precise coordination with other protective devices.
• Rugged reliability: Engineered to withstand the demands of industrial facilities, delivering consistent performance over time.

Ideal applications and use cases

Designed for main incoming feeders, switchboards, and critical power distribution where high interruption capacity and reliable protection are essential. Whether powering manufacturing lines, data centers, or large commercial complexes, the AT20L helps prevent cascading outages by quickly isolating faults and preserving downstream equipment.

Why this matters for your facility

Dense electrical systems require protection that doesn’t compromise uptime. The AT20L provides a robust defense against overloads and short circuits while offering adjustable protection settings to fit your protection coordination plan. By choosing this Terasaki breaker, you can:

• Minimize unplanned downtime and equipment damage from electrical faults
• Improve system reliability for critical loads and operations
• Achieve clearer fault discrimination and quicker restoration timelines

Specifications at a glance

• Model / Part Number: AT20L
• Current Rating: 2000A
• Voltage Rating: 690VAC
• Poles: 3-Pole
• Breaker Type: Air Circuit Breaker

For facilities requiring robust three-phase protection with high interruption capacity, the Terasaki AT20L 2000A 690VAC 3-Pole Air Circuit Breaker delivers dependable performance, precise protection, and the reliability you rely on in demanding power distribution environments.