1SDA056284R1 ABB E3S2500 PR122/P-LSI 2500A 4P Fixed Air Circuit Breaker

Why Choose the ABB E3S2500 PR122/P-LSI 2500A 4P Fixed Air Circuit Breaker?

The ABB 1SDA056284R1 is a high-performance SACE Emax E3S air circuit breaker (ACB) designed for switching and protection in demanding low-voltage electrical distribution systems. Part of the ABB New Emax product group, this four-pole fixed circuit breaker combines a 2500 A rated uninterrupted current with the advanced PR122/P-LSI R2500 electronic overcurrent release for dependable protection of industrial, commercial and infrastructure power networks.

The E3S2500 provides long-time, short-time and instantaneous protection through its LSI trip functionality. The PR122/P electronic release protects against overload, short-time delayed short-circuit and instantaneous short-circuit conditions while providing the enhanced measurement, signalling and accessory capabilities associated with ABB's PR122/P platform. This LSI configuration does not include integrated earth-fault protection.

With a rated uninterrupted current of 2500 A, a 690 V AC rated operational voltage and an ultimate short-circuit breaking capacity of 75 kA across the specified 220–690 V AC range, the E3S2500 provides robust protection for high-capacity distribution systems. This version features a four-pole fixed configuration with rear flat horizontal terminals, four auxiliary contacts and circuit-breaker open/closed position indication for permanent integration into low-voltage switchgear.

Key Advantages

• High-performance ABB SACE Emax E3S air circuit breaker for demanding low-voltage power distribution.
• 2500 A rated uninterrupted current for substantial industrial and infrastructure electrical systems.
• Four-pole fixed configuration suitable for three-phase systems requiring neutral switching.
• PR122/P-LSI R2500 electronic overcurrent release for overload and short-circuit protection.
• LSI functionality provides long-time, short-time and instantaneous protection.
• 75 kA Icu and Ics across the specified 220–690 V AC operating range.
• 75 kA Icw for 1 s and 65 kA Icw for 3 s provide robust short-time withstand performance.
• Rear flat horizontal terminals provide a practical connection arrangement for fixed switchboard installations.

Key Features

• ABB SACE Emax E3S2500 air circuit breaker.
• 2500 A rated uninterrupted current.
• Four-pole construction.
• Fixed circuit-breaker configuration.
• PR122/P-LSI R2500 electronic overcurrent release.
• Long-time, short-time and instantaneous (LSI) protection functions.
• No integrated earth-fault protection in this LSI configuration.
• 690 V AC rated operational voltage.
• 75 kA Icu at 220–690 V AC.
• 75 kA Ics at 220–690 V AC.
• 75 kA Icw for 1 s and 65 kA Icw for 3 s.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Rear flat horizontal terminals.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Reliable High-Performance Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E3S2500 provide switching, isolation and electronic overcurrent protection at critical points within high-current low-voltage distribution systems. The E3 frame combines substantial continuous-current capability with the S short-circuit performance level, making it suitable for switchboards and distribution networks where robust fault interruption and short-time withstand capability are required.

The PR122/P-LSI electronic trip unit provides long-time overload, short-time delayed overcurrent and instantaneous short-circuit protection while offering the advanced electronic functionality of ABB's PR122/P platform. Combined with the fixed Emax construction, 75 kA breaking capacity and high short-time withstand capability, this configuration provides dependable protection and coordination for demanding industrial, commercial and infrastructure installations.

Typical Applications

• Main incoming circuit breakers in high-current low-voltage switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical installations.
• Manufacturing and process plants.
• Transformer-fed distribution systems.
• Generator distribution and protection systems.
• High-current distribution feeder protection.
• Four-pole distribution systems requiring neutral switching.
• Fixed low-voltage switchgear and power distribution assemblies.