1SDA059277R1 ABB E2N1000 PR122/P-LSIG 1000 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA059277R1 E2N1000 Air Circuit Breaker?

The ABB 1SDA059277R1 is a high-performance SACE Emax E2N 1000 A three-pole air circuit breaker designed for comprehensive protection and switching in low-voltage electrical distribution systems. Part of the ABB New Emax product family, this fixed circuit breaker combines a 1000 A rated current with the advanced PR122/P-LSIG electronic overcurrent release for demanding industrial and commercial power applications.

The E2N1000 is equipped with an ABB PR122/P-LSIG electronic trip unit, providing long-time, short-time, instantaneous and earth-fault protection functions. This LSIG protection package helps safeguard cables, busbars, switchgear and connected equipment against overload, short-circuit and earth-fault conditions while supporting coordinated protection within electrical distribution networks.

This model features a three-pole fixed configuration with rear horizontal terminals for permanent switchboard installation. It has a rated operational voltage of 690 V AC and a rated ultimate short-circuit breaking capacity of 65 kA at 400 V AC, while four auxiliary change-over contacts and open/closed indication support integration with control and signalling systems.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for low-voltage power distribution.
• 1000 A rated uninterrupted current for demanding industrial and commercial installations.
• Three-pole configuration designed for three-phase electrical distribution systems.
• PR122/P-LSIG electronic release provides comprehensive overcurrent and earth-fault protection.
• 65 kA rated ultimate short-circuit breaking capacity at 400 V AC.
• Fixed construction with rear horizontal terminals for permanent switchboard installation.
• Four auxiliary change-over contacts support control, signalling and status monitoring.
• Integrated open/closed indication provides clear circuit breaker operating status.

Key Features

• ABB SACE Emax E2N series.
• 1000 A rated uninterrupted current.
• Three-pole air circuit breaker.
• PR122/P-LSIG electronic overcurrent release.
• LSIG protection functions: long-time, short-time, instantaneous and earth-fault.
• 690 V AC rated voltage.
• 65 kA rated ultimate short-circuit breaking capacity at 400 V AC.
• Overload release adjustment range of 400–1000 A.
• Instantaneous short-circuit release adjustment range of 1500–15000 A.
• Fixed (F) execution.
• Rear horizontal terminals for main circuit connection.
• Four auxiliary change-over contacts.
• Integrated earth-fault protection.
• Open/closed position indication.
• Optional motor operating mechanism capability.

Advanced Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E2N protect low-voltage electrical distribution systems against potentially damaging overload, short-circuit and earth-fault conditions. The electronic trip unit monitors circuit current and initiates breaker operation when configured protection thresholds are exceeded, helping protect cables, busbars, switchgear and connected equipment.

The PR122/P-LSIG release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Together with the E2N breaker’s 65 kA short-circuit breaking capacity at 400 V AC and fixed construction, this makes the 1SDA059277R1 suitable for critical distribution systems requiring sophisticated electronic protection and robust switchboard integration.

Typical Applications

• Industrial low-voltage switchboards.
• Main incoming and distribution circuits.
• Three-phase electrical distribution systems.
• Manufacturing and process facilities.
• Commercial building power distribution.
• Electrical distribution panels and assemblies.
• Infrastructure and utility installations.
• Systems requiring fixed high-current air circuit breakers with earth-fault protection.