1SDA056049R1 ABB E2L1250 PR121/P-LSI 1250A 3P Fixed Air Circuit Breaker

Why Choose the ABB E2L1250 PR121/P-LSI 1250A 3P Fixed Air Circuit Breaker?

The ABB 1SDA056049R1 is a high-performance SACE Emax E2L air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. As part of the ABB New Emax product group, this three-pole fixed circuit breaker combines a 1250 A rated current with the PR121/P-LSI electronic overcurrent release for reliable protection of industrial, commercial and infrastructure power networks.

The E2L1250 provides long-time, short-time and instantaneous protection through its LSI trip functionality. The PR121/P electronic release provides adjustable protection characteristics, helping protect conductors and equipment against overload and short-circuit conditions while supporting coordination and selectivity throughout low-voltage distribution systems.

With a rated uninterrupted current of 1250 A, a 690 V AC rated operational voltage and an ultimate short-circuit breaking capacity of 130 kA at 415 V AC, the E2L1250 offers exceptionally high fault-interruption performance. This version features a three-pole fixed configuration with rear horizontal terminals for permanent integration into electrical switchboards and power distribution assemblies.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for low-voltage power distribution.
• 1250 A rated uninterrupted current for high-current electrical installations.
• Three-pole fixed configuration for industrial three-phase distribution systems.
• Advanced PR121/P-LSI electronic overcurrent release.
• LSI functionality provides long-time, short-time and instantaneous protection.
• Exceptional 130 kA breaking capacity at 415 V AC.
• 690 V AC rated operational voltage for demanding low-voltage networks.
• Rear horizontal terminals simplify permanent integration into switchboards and distribution assemblies.

Key Features

• ABB SACE Emax E2L1250 air circuit breaker.
• 1250 A rated uninterrupted current.
• Three-pole construction.
• Fixed circuit-breaker configuration.
• PR121/P-LSI electronic overcurrent release.
• 690 V AC rated operational voltage.
• 130 kA Icu at 415 V AC.
• 85 kA Icu at 690 V AC.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Rear flat horizontal terminal arrangement.
• Four auxiliary change-over contacts.
• Circuit-breaker open/closed position indication.

Reliable High-Capacity Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB Emax E2L1250 provide switching, isolation and overcurrent protection at critical points within high-current low-voltage distribution systems. The E2L performance level offers particularly high short-circuit breaking capability, making this circuit breaker suitable for installations where substantial prospective fault currents may occur.

The PR121/P-LSI electronic trip unit provides long-time overload, short-time overcurrent and instantaneous short-circuit protection. Adjustable protection settings allow the breaker to be coordinated with other protective devices throughout the electrical network, helping isolate faults while maintaining continuity of supply to unaffected circuits.

Typical Applications

• Main incoming circuit breakers in low-voltage switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical installations.
• Manufacturing and process plants.
• Transformer and generator distribution systems.
• High-fault-level distribution networks.
• High-current feeder protection.
• Power distribution and switchgear assemblies.