1SDA055868R1 ABB E2N1250 PR122/P-LSI 1250 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2N1250 1SDA055868R1 Air Circuit Breaker?

The ABB E2N1250 1SDA055868R1 is a high-performance SACE Emax air circuit breaker (ACB) designed for protection and switching in low-voltage electrical distribution systems. Part of the established ABB New Emax series, this E2N 1250 configuration features a four-pole fixed design, a rated current of 1250 A and a PR122/P-LSI electronic overcurrent release.

Designed for demanding industrial, commercial and infrastructure power distribution applications, the E2N1250 combines dependable 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 coordinated protection of high-current electrical distribution circuits.

This version is a fixed four-pole circuit breaker with rear horizontal terminals and combines a 1250 A rated current with a rated operational voltage of up to 690 V AC. The E2N performance level provides a rated ultimate short-circuit breaking capacity of 65 kA at 400 V AC, 50 Hz, while four auxiliary change-over contacts and open/closed position indication support integration into switchgear control and signalling systems.

Key Advantages

• Robust ABB SACE Emax air circuit breaker for demanding low-voltage power distribution.
• 1250 A rated current for high-current industrial and commercial installations.
• Four-pole fixed configuration suitable for four-conductor distribution systems.
• PR122/P-LSI electronic trip unit providing long-time, short-time and instantaneous overcurrent protection.
• 65 kA rated ultimate short-circuit breaking capacity at 400 V AC, 50 Hz.
• Rear horizontal terminals provide a practical connection arrangement for compatible low-voltage switchboards.

Key Features

• ABB SACE New Emax E2N 1250 circuit breaker platform.
• 1250 A rated current.
• Four-pole construction.
• Fixed circuit breaker configuration.
• Rear horizontal terminals.
• PR122/P-LSI electronic overcurrent release.
• R1250 release rating.
• Long-time overload, short-time short-circuit and instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• Four auxiliary change-over contacts and circuit breaker open/closed position indication.

Reliable Protection for High-Current 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 enables accurate detection of abnormal current conditions, allowing the breaker to disconnect the protected circuit when configured protection thresholds are exceeded.

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 rear horizontal terminals, this configuration is well suited to switchboards requiring dependable high-current protection, selective coordination and straightforward 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.