1SDA057377R1 ABB E3N-A 2000 PR121/P-LSIG 2000 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3N-A 2000 PR121/P-LSIG 1SDA057377R1 Air Circuit Breaker?

The ABB 1SDA057377R1 is a high-performance SACE Emax E3N-A air circuit breaker moving part designed for reliable switching and comprehensive protection in low-voltage electrical distribution systems. As part of the ABB SACE Emax series, this three-pole breaker combines a 2000 A rated current with the PR121/P-LSIG electronic overcurrent release for demanding industrial, commercial and infrastructure power distribution applications.

The breaker is equipped with an ABB PR121/P-LSIG R2000 electronic trip unit, providing long-time, short-time, instantaneous and ground-fault protection. These LSIG protection functions allow the circuit breaker to respond to overloads, short circuits and earth faults, helping protect cables, busbars, switchgear and connected electrical equipment.

With a rated current of 2000 A and a three-pole withdrawable configuration, the E3N-A 1SDA057377R1 is designed for high-current three-phase AC distribution systems. Supplied as the moving part of the circuit breaker, it is fitted with four auxiliary contacts and circuit-breaker open/closed position indication for integration into compatible SACE Emax switchgear assemblies.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker moving part for low-voltage power distribution.
• 2000 A rated current for demanding high-current installations.
• PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• LSIG functions provide long-time, short-time, instantaneous and ground-fault protection.
• Three-pole withdrawable configuration for three-phase AC distribution systems.
• Moving-part design supports convenient removal and servicing within compatible switchgear.
• Four auxiliary contacts and open/closed position indication support signalling and control.

Key Features

• ABB SACE Emax E3N-A series.
• 2000 A rated current.
• Three-pole air circuit breaker moving part.
• PR121/P-LSIG R2000 electronic trip unit.
• Long-time overload protection.
• Short-time selective short-circuit protection.
• Instantaneous short-circuit protection.
• Ground-fault protection.
• Withdrawable moving-part configuration.
• Four auxiliary contacts.
• Open/closed circuit-breaker position indication.
• UL version for compatible SACE Emax installations.

Comprehensive Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3N-A are designed to switch and protect high-current low-voltage distribution circuits. The PR121/P-LSIG electronic trip unit monitors current conditions and provides multiple protection functions, enabling the breaker to respond to overloads, short circuits and ground faults while supporting effective protection coordination throughout the electrical distribution system.

The inclusion of ground-fault protection distinguishes the LSIG configuration from LSI-only variants and makes the 1SDA057377R1 suitable for installations requiring comprehensive fault protection. Its withdrawable moving-part construction also supports maintainability and operational flexibility in compatible industrial switchboards and power distribution assemblies.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical distribution.
• Manufacturing and process plant switchgear.
• Generator and transformer distribution circuits.
• High-current three-phase AC installations.
• Distribution systems requiring ground-fault protection.