1SDA055971R1 ABB E2S1250 PR122/P-LI 1250A 3-Pole Withdrawable Air Circuit Breaker

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

The ABB E2S1250 PR122/P-LI, order code 1SDA055971R1, is a high-performance three-pole withdrawable air circuit breaker moving part designed for switching and protection 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 in industrial, commercial and infrastructure power networks.

This configuration is supplied as the withdrawable moving part (W MP) for a compatible SACE Emax withdrawable fixed part, allowing the breaker assembly to be withdrawn for inspection, servicing or replacement. The fitted PR122/P-LI R1250 electronic overcurrent release provides long-time and instantaneous protection functions, helping protect electrical systems against sustained overloads and severe short-circuit faults.

The E2S performance level provides an ultimate and service short-circuit breaking capacity of 85 kA at 415 V AC, together with a short-time withstand current of 65 kA for 1 s. Four auxiliary contacts and open/closed circuit-breaker position indication support status signalling and integration into low-voltage switchboards requiring maintainable withdrawable protection.

Key Advantages

• High-performance ABB SACE Emax E2S air circuit breaker moving part for low-voltage power distribution.
• 1250 A rated current for demanding industrial and commercial distribution applications.
• Three-pole withdrawable 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.
• 85 kA ultimate and service short-circuit breaking capacity at 415 V AC.
• 65 kA short-time withstand current for 1 s for robust fault-current performance.
• Withdrawable moving-part design supports efficient inspection, maintenance and replacement.

Key Features

• ABB SACE Emax E2S series.
• 1250 A rated uninterrupted current.
• Three-pole construction.
• Withdrawable moving part (W MP).
• PR122/P electronic overcurrent release.
• R1250 release rating.
• LI protection: long-time and instantaneous.
• 690 V AC rated operational voltage.
• 85 kA breaking capacity at 415 V AC.
• 65 kA breaking capacity at 690 V AC.
• Four auxiliary contacts for status 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 offers strong short-circuit interruption capability, while the withdrawable architecture is particularly useful where maintainability and service continuity are important because the moving circuit-breaker assembly can be withdrawn from its compatible fixed part.

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 and generator distribution circuits.
• Switchgear requiring withdrawable circuit-breaker architecture for maintenance flexibility.