1SDA055955R1 ABB E2S1250 PR122/P-LI 1250A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1250 PR122/P-LI 1250A Air Circuit Breaker?

The ABB E2S1250 PR122/P-LI, order code 1SDA055955R1, is a high-performance three-pole fixed air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the established ABB SACE Emax series, this E2S circuit breaker combines a rated current of 1250 A with the PR122/P electronic overcurrent release for dependable protection of industrial, commercial and infrastructure power networks.

This configuration is a fixed three-pole circuit breaker with horizontal rear terminals, providing a practical connection arrangement for integration into low-voltage switchboards. The fitted PR122/P-LI R1250 electronic overcurrent release provides long-time and instantaneous protection functions, helping protect electrical systems against sustained overloads and high-level short-circuit faults.

The E2S performance level provides increased short-circuit capability for installations with demanding prospective fault currents. The breaker is also equipped with four auxiliary contacts and open/closed position indication, supporting remote status signalling, monitoring and integration with switchboard control systems.

Key Advantages

• High-performance ABB SACE Emax E2S air circuit breaker for low-voltage power distribution.
• 1250 A rated current for industrial and commercial distribution applications.
• Three-pole fixed configuration for three-phase electrical systems.
• PR122/P-LI electronic overcurrent release for accurate circuit protection.
• Long-time and instantaneous protection against overload and short-circuit conditions.
• E2S high-performance breaking-capacity class for demanding fault levels.
• Horizontal rear terminals for convenient switchboard connection.
• Four auxiliary contacts and open/closed indication support control and status monitoring.

Key Features

• ABB SACE Emax E2S series.
• 1250 A rated current.
• Three-pole construction.
• Fixed installation version.
• Horizontal rear terminals (HR).
• PR122/P electronic overcurrent release.
• R1250 release rating.
• LI protection: long-time and instantaneous.
• Designed for low-voltage AC power distribution systems.
• Four auxiliary contacts for status and control signalling.
• Open/closed circuit-breaker position indication.

Advanced Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E2S1250 provide switching, isolation and protection for high-current low-voltage distribution circuits. The E2S performance class is intended for applications requiring robust short-circuit performance, making the breaker suitable for main distribution boards, feeder circuits and other critical power-distribution positions.

The PR122/P electronic overcurrent release provides precise electronic protection for demanding electrical networks. In this LI configuration, long-time protection responds to sustained overload conditions while instantaneous protection rapidly responds to severe short-circuit currents, helping safeguard conductors, switchgear and connected electrical equipment.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and feeder circuit protection.
• Manufacturing and process plants.
• Commercial buildings and infrastructure installations.
• Motor control centres and power distribution assemblies.
• Transformer secondary distribution circuits.
• High fault-level low-voltage switchgear systems.