1SDA055887R1 ABB E2N1250 PR123/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E2N1250 1SDA055887R1 Air Circuit Breaker?

The ABB E2N1250 1SDA055887R1 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 E2N 1250 configuration features a four-pole withdrawable design, a rated current of 1250 A and the advanced PR123/P-LSIG electronic overcurrent release.

Designed for industrial, commercial and infrastructure power distribution applications, the E2N1250 combines dependable circuit protection with the serviceability of a withdrawable breaker arrangement. The PR123/P-LSIG trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, delivering comprehensive protection for high-current electrical distribution circuits.

This version is supplied as the moving part for an E2N 1250 withdrawable circuit breaker and combines a 1250 A rated current with four-pole construction. The E2N performance level provides a rated ultimate short-circuit breaking capacity of 65 kA at 400 V AC, while four auxiliary contacts and open/closed position indication support integration into switchgear control and signalling systems.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker moving part for demanding low-voltage distribution systems.
• 1250 A rated current for substantial industrial and commercial electrical loads.
• Four-pole withdrawable configuration supports flexible installation and maintenance.
• Advanced PR123/P-LSIG electronic trip unit provides comprehensive overcurrent and earth-fault protection.
• 65 kA short-circuit performance at 400 V AC from the E2N performance class.
• Withdrawable construction enables convenient inspection, servicing and replacement within compatible ABB SACE Emax switchgear.

Key Features

• ABB SACE New Emax E2N 1250 circuit breaker platform.
• 1250 A rated current.
• Four-pole construction.
• Withdrawable moving-part configuration.
• PR123/P-LSIG electronic overcurrent release.
• R1250 / 1250 A rating plug.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• Designed for use with the corresponding SACE Emax withdrawable fixed part.
• 65 kA E2N short-circuit performance at 400 V AC.
• Four auxiliary contacts and circuit breaker open/closed position indication.

Advanced LSIG Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E2N1250 provide switching and protection for high-current low-voltage distribution circuits. Electronic trip technology allows abnormal current conditions to be detected accurately, enabling the breaker to disconnect the protected circuit according to the configured protection parameters.

The PR123/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 SACE Emax architecture, this configuration is particularly suitable for switchboards requiring comprehensive protection, selective coordination, maintainability and operational flexibility.

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 integrated earth-fault protection and withdrawable circuit breakers.