1SDA056119R1 ABB E3N2500PR123/P-LSIG 2500A 3-Pole Air Circuit Breaker

Why Choose the ABB E3N2500PR123/P-LSIG 2500A Air Circuit Breaker?

The ABB E3N2500PR123/P-LSIG is a high-performance 2500 A three-pole air circuit breaker designed for reliable switching and comprehensive protection in demanding low-voltage power distribution systems. As part of the established ABB SACE Emax New Emax series, this E3N breaker combines a robust high-current frame with the advanced PR123/P-LSIG electronic overcurrent release.

The PR123/P-LSIG trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. These LSIG protection functions help safeguard cables, busbars, switchboards and connected equipment against a broad range of electrical fault conditions while supporting selective protection and coordination in complex distribution networks.

With a rated current of 2500 A, a three-pole fixed configuration and rear horizontal terminals, ABB order code 1SDA056119R1 is designed for integration into high-current low-voltage switchboards. The breaker is equipped with a PR123/P-LSIG R2500 overcurrent release, four auxiliary contacts and open/closed position indication for effective monitoring and control integration.

Key Advantages

• High-capacity 2500 A air circuit breaker for low-voltage power distribution.
• Three-pole fixed configuration suitable for three-phase AC systems.
• Advanced PR123/P-LSIG R2500 electronic overcurrent release.
• LSIG functions provide overload, short-time, instantaneous and earth-fault protection.
• 65 kA ultimate and service short-circuit breaking capacity across the specified operating-voltage range.
• Rear horizontal terminals facilitate integration with switchboard busbars.
• Four auxiliary contacts and open/closed position indication support status monitoring and control systems.

Key Features

• ABB SACE Emax E3N series.
• 2500 A rated uninterrupted current.
• Three-pole circuit-breaker configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR123/P-LSIG electronic trip unit.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• Integrated earth-fault protection (G).

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB E3N2500 provide switching and overcurrent protection for high-current low-voltage distribution circuits. The electronic trip release monitors circuit conditions and initiates breaker operation when configured protection thresholds are exceeded, helping protect cables, busbars, switchboards and connected electrical equipment against damaging overloads and fault currents.

The PR123/P-LSIG release combines long-time, short-time, instantaneous and earth-fault protection in an advanced electronic trip system. Together with the E3N frame's 65 kA short-circuit performance and fixed rear-horizontal-terminal construction, this makes the breaker well suited to critical main distribution and high-current feeder applications.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process facilities.
• Commercial and infrastructure electrical installations.
• Incoming mains and high-current feeder protection.
• Transformer and generator distribution systems.
• Fixed ABB SACE Emax switchgear assemblies.