1SDA055845R1 ABB E2B 2000 PR122/P-LSIG 2000A 3-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB 1SDA055845R1 E2B 2000 Air Circuit Breaker?

The ABB 1SDA055845R1 is a high-performance SACE Emax E2B 2000 withdrawable air circuit breaker moving part designed for protection and switching in high-current low-voltage power distribution systems. This three-pole unit combines a 2000 A rated current with ABB's advanced PR122/P-LSIG electronic overcurrent release, providing comprehensive protection for demanding industrial, commercial and infrastructure electrical installations.

As part of the ABB SACE Emax circuit breaker range, the E2B 2000 is engineered for dependable protection of distribution networks, switchboards, transformers and high-current feeders. The PR122/P-LSIG release provides long-time, short-time, instantaneous and earth-fault protection functions, enabling the breaker to respond effectively to overloads, short circuits and earth faults while supporting coordinated low-voltage protection schemes.

This model is supplied as the moving part of a three-pole withdrawable circuit breaker with a rated uninterrupted current of 2000 A and rated operational voltage of 690 V AC. It provides a rated ultimate short-circuit breaking capacity of 42 kA at 400 V AC and is fitted with four auxiliary contacts plus circuit-breaker open/closed position indication for integration into advanced switchboard systems.

Key Advantages

• High-capacity 2000 A air circuit breaker moving part for low-voltage power distribution.
• Three-pole configuration designed for three-phase electrical systems.
• Withdrawable (W) construction supports maintainable switchboard installations.
• Advanced PR122/P-LSIG electronic overcurrent release.
• LSIG functionality provides long-time, short-time, instantaneous and earth-fault protection.
• 42 kA ultimate short-circuit breaking capacity at 400 V AC for demanding distribution applications.

Key Features

• ABB SACE Emax E2B 2000 circuit breaker moving part.
• 2000 A rated uninterrupted current.
• Three-pole circuit breaker configuration.
• Withdrawable (W) version.
• PR122/P-LSIG electronic trip unit.
• Long-time overload protection.
• Short-time and instantaneous short-circuit protection.
• Integrated earth-fault protection.
• 690 V AC rated operational voltage.
• Fitted with four auxiliary contacts and circuit-breaker open/closed position indication.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E2B 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, short-circuit and earth-fault conditions.

The PR122/P-LSIG release gives this E2B 2000 comprehensive long-time, short-time, instantaneous and earth-fault protection capabilities for effective coordination within electrical distribution systems. Its 2000 A rating, three-pole arrangement and withdrawable construction make it particularly suitable for switchboards where high-current protection, serviceability and operational flexibility are important.

Typical Applications

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