1SDA055964R1 ABB E2S1250 PR122/P-LSI 1250 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1250 1SDA055964R1 Air Circuit Breaker?

The ABB E2S1250 1SDA055964R1 is a high-performance SACE Emax air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the established ABB New Emax series, this E2S 1250 configuration features a four-pole fixed design, a rated current of 1250 A and a PR122/P-LSI electronic overcurrent release.

Designed for industrial, commercial and infrastructure power distribution applications, the E2S1250 combines dependable high-current circuit protection with configurable electronic trip functionality. The PR122/P-LSI release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection, supporting selective and coordinated protection of critical electrical distribution circuits.

This version combines a 1250 A rated current, four-pole construction and a fixed installation format. The higher-performance E2S platform is engineered for installations requiring increased short-circuit capability, while the fixed configuration provides robust integration into compatible low-voltage switchboards.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for demanding low-voltage power distribution.
• 1250 A rated current for substantial industrial and commercial electrical loads.
• Four-pole fixed configuration suitable for four-conductor distribution systems.
• PR122/P-LSI electronic trip unit provides long-time, short-time and instantaneous overcurrent protection.
• E2S performance level provides enhanced short-circuit capability for demanding distribution networks.
• Fixed construction provides robust integration into compatible ABB SACE Emax switchboards and power distribution assemblies.

Key Features

• ABB SACE New Emax E2S 1250 circuit breaker platform.
• 1250 A rated current.
• Four-pole construction.
• Fixed circuit breaker configuration.
• PR122/P-LSI electronic overcurrent release.
• R1250 / 1250 A release rating.
• Long-time overload, short-time short-circuit and instantaneous short-circuit protection.
• Adjustable electronic protection supports selective coordination within low-voltage distribution systems.
• No integrated earth-fault protection in the LSI configuration.
• Designed for high-current industrial, commercial and infrastructure switchgear applications.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E2S1250 provide switching and protection for high-current low-voltage distribution circuits. Electronic trip technology enables abnormal current conditions to be detected accurately, allowing the breaker to disconnect the protected circuit according to configured protection parameters and helping safeguard cables, switchgear and connected equipment.

The PR122/P-LSI release provides L, S and I protection functions, covering long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with the fixed SACE Emax architecture and the higher-performance E2S platform, this configuration is well suited to switchboards requiring dependable high-current protection, selective coordination and robust system integration.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical distribution.
• Manufacturing and process plant switchgear.
• Incoming and outgoing high-current feeder protection.
• Four-pole distribution systems requiring fixed air circuit breakers with enhanced short-circuit performance.