1SDA057755R1 ABB E3V-A 2000 PR121/P-LSI 2000 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3V-A 2000 PR121/P-LSI Air Circuit Breaker?

The ABB E3V-A 2000 PR121/P-LSI, order code 1SDA057755R1, is a high-performance SACE Emax air circuit breaker designed for protection and switching in demanding low-voltage electrical distribution systems. This three-pole fixed breaker combines the E3V-A platform with a PR121/P-LSI R2000 electronic overcurrent release for reliable protection of high-current circuits.

With a rated current of 2000 A, the breaker provides LSI protection comprising long-time overload, short-time short-circuit and instantaneous short-circuit functions. Its fixed construction and rear horizontal terminals make it suitable for permanent installation in switchboards where dependable high-current switching and coordinated circuit protection are required.

The 1SDA057755R1 is a UL version of the SACE Emax E3V-A and incorporates four auxiliary contacts with open/closed position indication for integration with switchboard signalling and control systems. Combining robust ABB breaker technology with electronic protection, it is suited to main incomers, high-current feeders and other critical distribution circuits.

Key Advantages

• High-performance 2000 A SACE Emax air circuit breaker.
• PR121/P-LSI R2000 electronic overcurrent release for dependable circuit protection.
• LSI functionality provides long-time, short-time and instantaneous protection.
• Three-pole fixed configuration for three-phase low-voltage distribution systems.
• Rear horizontal terminals for fixed switchboard installation.
• Four auxiliary contacts support breaker status signalling and control integration.
• ABB SACE Emax construction for demanding industrial and infrastructure applications.

Key Features

• ABB SACE Emax E3V-A circuit breaker platform.
• 2000 A rated current.
• Three-pole construction.
• Fixed breaker execution.
• Rear horizontal terminals.
• PR121/P-LSI R2000 electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Four auxiliary contacts with open/closed position indication.

Advanced Protection for High-Current Distribution

Air circuit breakers such as the ABB SACE Emax E3V-A provide switching, isolation and fault protection for high-current low-voltage distribution circuits. Electronic trip technology monitors electrical conditions and initiates circuit interruption when configured protection thresholds are exceeded.

The PR121/P-LSI release combines long-time protection against sustained overloads, short-time protection that supports selective short-circuit coordination and instantaneous protection against severe short circuits. This combination makes the E3V-A 2000 suitable for critical electrical networks requiring reliable high-current protection.

Typical Applications

• Industrial low-voltage switchboards.
• Main incoming electrical distribution circuits.
• High-current distribution feeders.
• Manufacturing and process plants.
• Commercial and infrastructure power systems.
• Transformer and generator distribution systems.