1SDA055940R1 ABB E2N 2000 PR122/P-LSI 2000A 3-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB 1SDA055940R1 E2N 2000 Air Circuit Breaker?

The ABB 1SDA055940R1 is a SACE Emax E2N 2000 withdrawable air circuit breaker moving part designed for dependable switching and protection in demanding low-voltage power distribution systems. This three-pole unit combines a 2000 A rated current with ABB's PR122/P-LSI electronic overcurrent release, providing configurable protection for high-current industrial, commercial and infrastructure electrical installations.

As part of the ABB SACE Emax range, the E2N 2000 is engineered for applications including transformer, generator and installation protection. The PR122/P-LSI release provides long-time, short-time and instantaneous protection functions, helping protect conductors, switchgear and connected equipment against sustained overloads and short-circuit conditions.

This model is supplied as the moving part of a three-pole withdrawable circuit breaker. It has a rated uninterrupted current of 2000 A, an ultimate short-circuit breaking capacity of 65 kA at 415 V AC and 55 kA at 690 V AC, making it a robust solution for high-current switchboard installations where maintainability and selective protection are important.

Key Advantages

• High-capacity 2000 A air circuit breaker moving part for low-voltage power distribution.
• Three-pole configuration for three-phase electrical systems.
• Withdrawable (W) construction supports convenient servicing and switchboard maintenance.
• Advanced PR122/P-LSI electronic overcurrent release.
• LSI functionality provides long-time, short-time and instantaneous protection.
• 65 kA ultimate short-circuit breaking capacity at 415 V AC for demanding distribution applications.

Key Features

• ABB SACE Emax E2N 2000 circuit breaker moving part.
• 2000 A rated uninterrupted current.
• Three-pole circuit breaker configuration.
• Withdrawable (W) version.
• PR122/P-LSI electronic trip unit.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Fitted with four auxiliary contacts.
• Integrated open/closed position indication.

Reliable LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E2N provide switching, isolation and automatic overcurrent protection for high-current low-voltage distribution circuits. The electronic trip unit monitors circuit conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect switchgear, conductors and connected electrical equipment against damaging overload and short-circuit currents.

The PR122/P-LSI release gives this E2N 2000 long-time, short-time and instantaneous protection capabilities for effective coordination within electrical distribution systems. Combined with its 2000 A rating, three-pole arrangement, withdrawable construction and E2N short-circuit performance, the ABB 1SDA055940R1 is well suited to demanding high-current switchboard installations.

Typical Applications

• Industrial low-voltage switchboards and distribution panels.
• Main incoming circuit protection.
• High-current three-phase distribution feeders.
• Transformer and generator protection systems.
• Manufacturing plants and process facilities.
• Commercial and infrastructure power distribution systems.