1SDA055935R1 ABB E2N2000 PR123/P-LSIG 2000A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2N2000 PR123/P-LSIG 2000A 4-Pole Fixed Air Circuit Breaker?

The ABB 1SDA055935R1 is a high-performance SACE Emax E2N air circuit breaker (ACB) designed for switching and protection in demanding low-voltage electrical distribution systems. Rated at 2000 A, this four-pole fixed circuit breaker is equipped with the PR123/P-LSIG R2000 electronic overcurrent release for comprehensive protection against overload, short-circuit and ground-fault conditions.

As part of the ABB SACE Emax / New Emax range, the E2N2000 combines high short-circuit interruption capability with advanced electronic protection for industrial and commercial power distribution. The PR123/P-LSIG release provides long-time, short-time, instantaneous and ground-fault protection functions, supporting selective coordination and dependable protection of cables, busbars, transformers and connected equipment.

The E2N2000 PR123/P-LSIG is a four-pole fixed circuit breaker with rear horizontal terminals, a rated uninterrupted current of 2000 A and a rated voltage of 690 V AC. Its N performance level provides a rated ultimate short-circuit breaking capacity of 65 kA at 400 V AC, making it suitable for high-current, high-fault-level three-phase four-wire distribution systems.

Key Advantages

• High-capacity 2000 A SACE Emax air circuit breaker.
• Four-pole configuration for three-phase four-wire electrical distribution systems.
• Advanced PR123/P-LSIG R2000 electronic overcurrent release.
• LSIG protection provides long-time, short-time, instantaneous and ground-fault protection.
• 65 kA ultimate short-circuit breaking capacity at 400 V AC.
• Adjustable overload protection from 800–2000 A.
• Fixed construction with rear horizontal terminals for permanent switchboard integration.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Key Features

• ABB SACE Emax E2N2000 air circuit breaker.
• 2000 A rated uninterrupted current.
• Four-pole configuration.
• Fixed circuit-breaker construction.
• Rear horizontal terminals.
• PR123/P-LSIG R2000 electronic overcurrent release.
• Long-time, short-time, instantaneous and ground-fault LSIG protection functions.
• 690 V AC rated voltage.
• 65 kA Icu at 400 V AC, 50 Hz.
• Adjustable short-time and instantaneous short-circuit protection.
• IP2X degree of protection.
• Optional motor operating mechanism for electrically operated applications.

Advanced LSIG Protection for High-Current Power Distribution

Air circuit breakers such as the ABB E2N2000 provide switching, isolation and protection for high-current low-voltage distribution circuits. The four-pole configuration is particularly suitable for three-phase four-wire systems where switching of the neutral conductor is required, while the fixed construction and rear horizontal terminals provide robust integration into permanent switchboard assemblies.

The PR123/P-LSIG electronic release provides long-time protection against sustained overloads, short-time protection for selective short-circuit coordination, instantaneous protection against severe fault currents and integrated ground-fault protection. These functions, combined with the E2N's 65 kA breaking capacity at 400 V AC, support dependable protection and coordination in demanding electrical distribution networks.

Typical Applications

• Industrial low-voltage switchboards and distribution panels.
• Three-phase four-wire electrical distribution systems.
• Main incoming circuit protection.
• High-current and high-fault-level feeder protection.
• Busbar and bus-coupler applications.
• Transformer secondary distribution systems.
• Manufacturing and process plants.
• Commercial, infrastructure and critical power distribution installations.