1SDA055965R1 ABB E2S1250 PR122/P-LSIG 1250 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1250 1SDA055965R1 Air Circuit Breaker?

The ABB E2S1250 1SDA055965R1 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 with horizontal rear terminals, a rated current of 1250 A and a PR122/P-LSIG electronic overcurrent release.

Designed for industrial, commercial and infrastructure power distribution applications, the E2S1250 combines high short-circuit performance with comprehensive electronic protection. The PR122/P-LSIG release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, supporting selective and coordinated protection across critical low-voltage distribution circuits.

This version combines a 1250 A rated current, four-pole construction and fixed horizontal rear connections. The E2S performance level provides a rated ultimate short-circuit breaking capacity of up to 85 kA at 415 V AC, while four auxiliary contacts and circuit breaker open/closed indication support integration into switchgear control, monitoring and signalling systems.

Key Advantages

• High-performance ABB SACE Emax E2S air circuit breaker for demanding low-voltage power distribution.
• 1250 A rated current for substantial industrial, commercial and infrastructure electrical loads.
• Four-pole fixed configuration with horizontal rear terminals for robust switchboard integration.
• PR122/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and earth-fault protection.
• 85 kA short-circuit performance at 415 V AC for installations with high prospective fault levels.
• Integrated auxiliary contacts and breaker position indication support control and monitoring applications.

Key Features

• ABB SACE New Emax E2S 1250 circuit breaker platform.
• 1250 A rated current.
• Four-pole construction.
• Fixed circuit breaker configuration.
• Horizontal rear terminals.
• PR122/P-LSIG electronic overcurrent release.
• R1250 / 1250 A release rating.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• E2S 85 kA performance class for demanding short-circuit conditions.
• Four auxiliary contacts with circuit breaker open/closed position indication.

High-Performance LSIG Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E2S1250 provide switching and protection for high-current low-voltage distribution circuits where substantial fault levels may be present. The E2S performance class combines high breaking capability with electronic trip technology, helping safeguard cables, busbars, switchgear and connected equipment against potentially damaging electrical faults.

The PR122/P-LSIG release provides L, S, I and G protection functions, covering long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Combined with the fixed four-pole SACE Emax architecture and 85 kA performance at 415 V AC, this configuration is well suited to switchboards requiring comprehensive protection, selective coordination and high fault-handling capability.

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 earth-fault protection.