1SDA055981R1 ABB E2S1250 PR122/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E2S1250 1SDA055981R1 Air Circuit Breaker?

The ABB E2S1250 1SDA055981R1 is a high-performance SACE Emax air circuit breaker (ACB) moving part 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 withdrawable design, 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 the serviceability of a withdrawable breaker arrangement. The PR122/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, supporting selective and comprehensive protection of critical electrical distribution circuits.

This version is supplied as the moving part for an E2S 1250 withdrawable circuit breaker and combines a 1250 A rated current with four-pole construction. The E2S performance level provides high fault-handling capability for demanding installations, while four auxiliary contacts and circuit breaker open/closed position indication support integration into switchgear control and signalling systems.

Key Advantages

• High-performance ABB SACE Emax E2S air circuit breaker moving part for demanding low-voltage power distribution.
• 1250 A rated current for substantial industrial, commercial and infrastructure electrical loads.
• Four-pole withdrawable configuration supports flexible installation, servicing and maintenance.
• PR122/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and earth-fault protection.
• E2S performance level provides high short-circuit capability for installations with substantial prospective fault currents.
• Withdrawable construction enables convenient inspection and replacement within compatible ABB SACE Emax switchgear.

Key Features

• ABB SACE New Emax E2S 1250 circuit breaker platform.
• 1250 A rated current.
• Four-pole construction.
• Withdrawable moving-part configuration.
• PR122/P-LSIG electronic overcurrent release.
• R1250 / 1250 A release rating.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• Four auxiliary contacts for switchgear signalling and control integration.
• Circuit breaker open/closed position indication.
• 25,000-cycle mechanical durability for demanding switchgear applications.

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 withdrawable four-pole SACE Emax architecture, this configuration is well suited to switchboards requiring comprehensive protection, selective coordination, high fault-handling capability and convenient maintenance.

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 withdrawable air circuit breakers with earth-fault protection.