1SDA055937R1 ABB E2N2000 PR121/P-LSI 2000A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E2N2000 PR121/P-LSI 2000A Air Circuit Breaker?

The ABB E2N2000 PR121/P-LSI, order code 1SDA055937R1, is a high-performance three-pole withdrawable air circuit breaker moving part designed for protection and switching in low-voltage electrical distribution systems. As part of the proven ABB SACE Emax series, this E2N circuit breaker combines a 2000 A rated current with the PR121/P electronic overcurrent release for dependable protection in demanding industrial, commercial and infrastructure power installations.

This configuration is supplied as the withdrawable moving part (W MP) of the circuit breaker, allowing the breaker assembly to be withdrawn from its compatible fixed cradle for inspection, servicing and replacement. The integrated PR121/P-LSI electronic overcurrent release provides long-time, short-time and instantaneous protection functions, helping protect electrical networks against sustained overloads and short-circuit faults.

With a rated uninterrupted current of 2000 A, a rated operational voltage of 690 V AC and an ultimate short-circuit breaking capacity of 65 kA at 415 V AC, the E2N2000 is suited to demanding high-current distribution applications. Its withdrawable architecture, four auxiliary contacts and circuit-breaker open/closed position indication support maintainable integration into low-voltage switchboards and power distribution assemblies.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker moving part for low-voltage power distribution.
• 2000 A rated current for demanding high-current installations.
• Three-pole withdrawable configuration for three-phase electrical distribution systems.
• PR121/P-LSI electronic overcurrent release for comprehensive overcurrent protection.
• Long-time, short-time and instantaneous protection against overload and short-circuit conditions.
• 65 kA ultimate short-circuit breaking capacity at 415 V AC.
• 55 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 E2N series.
• 2000 A rated current.
• Three-pole construction.
• Withdrawable moving part (W MP).
• PR121/P-LSI R2000 electronic overcurrent release.
• LSI protection: long-time, short-time and instantaneous.
• 690 V AC rated operational voltage.
• 65 kA ultimate and service short-circuit breaking capacity at 415 V AC.
• 55 kA ultimate and service short-circuit breaking capacity at 690 V AC.
• 55 kA short-time withstand current for 1 s.
• Four auxiliary contacts for circuit-breaker status signalling.
• Open/closed circuit-breaker position indication.

Advanced Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E2N2000 provide switching, isolation and protection for high-current low-voltage distribution circuits. Withdrawable configurations are particularly useful in installations where maintainability and service continuity are important because the moving circuit-breaker assembly can be withdrawn from its compatible fixed cradle for inspection, servicing or replacement.

The PR121/P electronic overcurrent release provides LSI protection for demanding electrical networks. Long-time protection responds to sustained overload conditions, while short-time and instantaneous functions provide protection against short-circuit currents, helping coordinate protection and safeguard conductors, switchgear and connected electrical equipment.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and high-current feeder protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical systems.
• Motor control centres and power distribution assemblies.
• Transformer secondary and generator distribution circuits.
• Switchgear requiring withdrawable circuit-breaker architecture for maintenance flexibility.