1SDA057371R1 ABB E3N-A 2000 PR121/P-LSI 2000A 3P Air Circuit Breaker

Why Choose the ABB E3N-A 2000 PR121/P-LSI 2000A 3P Air Circuit Breaker?

The ABB E3N-A 2000 PR121/P-LSI, order code 1SDA057371R1, is a high-performance SACE Emax air circuit breaker designed for reliable protection and switching in high-current low-voltage electrical distribution systems. This three-pole E3N-A circuit breaker has a rated current of 2000 A and incorporates ABB's PR121/P-LSI electronic overcurrent release.

Part of the ABB SACE Emax range, the E3N-A combines robust circuit-breaker construction with electronic protection for industrial, commercial and infrastructure power systems. The PR121/P-LSI trip unit provides long-time, short-time and instantaneous protection functions, helping protect conductors, switchgear and connected equipment against overloads and short-circuit currents.

With its 2000 A current rating and three-pole construction, the E3N-A is suited to substantial three-phase distribution circuits including main incomers, bus couplers and high-current feeders. The Emax platform is engineered for dependable operation in switchboards where selective protection, continuity of supply and reliable fault interruption are important.

Key Advantages

• High-capacity 2000 A SACE Emax air circuit breaker for demanding power distribution systems.
• Three-pole configuration suitable for three-phase electrical networks.
• PR121/P-LSI electronic trip unit provides comprehensive overcurrent protection.
• LSI protection combines long-time, short-time and instantaneous functions.
• E3N-A frame designed for high-current low-voltage distribution applications.
• Suitable for selective and coordinated protection of important switchboard circuits.

Key Features

• ABB SACE Emax E3N-A series.
• 2000 A rated current.
• Three-pole construction.
• PR121/P-LSI electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Electronic trip technology for accurate circuit protection.
• Designed for high-current low-voltage AC distribution.
• Suitable for main incoming, bus-coupler and feeder protection duties.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3N-A provide controlled switching and protection of high-current low-voltage distribution circuits. The electronic trip unit monitors circuit conditions and initiates tripping when configured protection thresholds are exceeded, helping minimise damage caused by sustained overloads and short circuits.

The PR121/P-LSI release combines long-time, short-time and instantaneous protection functions for coordinated electrical distribution. Together with the robust SACE Emax platform, this makes the E3N-A suitable for critical distribution points where reliable fault protection and continuity of electrical service are essential.

Typical Applications

• Low-voltage power distribution switchboards.
• Industrial electrical distribution systems.
• Main incoming circuit protection.
• High-current feeder protection.
• Bus-coupler and distribution circuit protection.
• Commercial and infrastructure electrical systems.