1SDA055841R1 ABB E2B2000 PR121/P-LSI 2000 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA055841R1 E2B2000 Air Circuit Breaker?

The ABB 1SDA055841R1 is a SACE New Emax E2B2000 air circuit breaker (ACB) designed for dependable switching and protection in high-current low-voltage electrical distribution systems. This three-pole withdrawable breaker combines a rated current of 2000 A with the PR121/P-LSI electronic overcurrent release.

The PR121/P-LSI trip unit provides long-time (L), short-time (S) and instantaneous (I) protection. This combination protects against overload and short-circuit conditions while the short-time function supports selective coordination between upstream and downstream protective devices in industrial and commercial power distribution networks.

The 1SDA055841R1 uses a three-pole withdrawable configuration, allowing the circuit breaker to be integrated into compatible ABB E2 withdrawable switchgear assemblies. Withdrawable construction is particularly valuable in critical distribution systems because it facilitates isolation, inspection, maintenance and replacement without the permanent mounting arrangement associated with fixed breakers.

Key Advantages

• Genuine ABB SACE New Emax E2B2000 air circuit breaker.
• 2000 A rated current for high-current low-voltage power distribution.
• Three-pole configuration for three-phase electrical systems.
• PR121/P-LSI electronic overcurrent release.
• Provides long-time, short-time and instantaneous protection.
• Short-time protection supports improved selectivity and system coordination.
• Withdrawable construction facilitates isolation, inspection and maintenance.

Key Features

• ABB SACE New Emax E2B2000 series.
• 2000 A rated current.
• Three-pole withdrawable configuration.
• PR121/P-LSI electronic trip unit.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Electronic protection suitable for coordinated power distribution systems.
• Withdrawable design for compatible ABB E2 switchgear assemblies.
• Designed for demanding industrial and commercial low-voltage distribution applications.

Selective Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE New Emax E2B2000 provide switching, isolation and overcurrent protection for high-current low-voltage distribution circuits. The PR121/P electronic release monitors current conditions and initiates circuit-breaker operation when the configured overload or short-circuit protection thresholds are reached.

With long-time, short-time and instantaneous protection, the PR121/P-LSI configuration is particularly useful where selective coordination is required. The short-time function can permit downstream protective devices to clear appropriate faults before the upstream breaker operates, while instantaneous protection provides rapid response to severe short-circuit conditions.

Typical Applications

• Industrial low-voltage switchboards.
• Withdrawable power distribution assemblies.
• Main incoming circuit protection.
• High-current feeder protection.
• Manufacturing and process industry power systems.
• Commercial building electrical distribution.
• Infrastructure and utility electrical installations.