1SDA056913R1 ABB E4V 4000 PR121/P-LSI 4000A 3P Fixed Air Circuit Breaker

Why Choose the ABB E4V 4000 PR121/P-LSI 4000A 3P Fixed Air Circuit Breaker?

The ABB 1SDA056913R1 is a high-performance SACE Emax E4V air circuit breaker designed for protection and switching in high-current low-voltage electrical distribution systems. Rated at 4000 A, this three-pole fixed breaker incorporates an ABB PR121/P-LSI R4000 electronic overcurrent release providing long-time, short-time and instantaneous protection.

As part of the proven ABB SACE Emax series, the E4V 4000 is engineered for demanding industrial, infrastructure and commercial power distribution applications where dependable high-current switching and selective circuit protection are essential. Its fixed execution and rear horizontal terminals provide a robust arrangement for permanent integration into low-voltage switchboards.

This version is a three-pole fixed E4V 4000 A circuit breaker with rear horizontal terminals. It is supplied with the PR121/P-LSI R4000 trip unit, four auxiliary contacts and circuit-breaker open/closed position indication, providing comprehensive protection and signalling functionality for major electrical distribution circuits.

Key Advantages

• High-current 4000 A SACE Emax air circuit breaker for demanding power distribution systems.
• Three-pole configuration for three-phase electrical networks.
• Integrated PR121/P-LSI R4000 electronic overcurrent release.
• LSI protection provides long-time, short-time and instantaneous protection functions.
• Fixed circuit-breaker construction for permanent switchboard installations.
• Rear horizontal terminals facilitate integration with switchboard busbar systems.
• Includes four auxiliary contacts for signalling and control functions.
• Open/closed circuit-breaker position indication supports system monitoring.

Key Features

• ABB SACE Emax E4V air circuit breaker platform.
• 4000 A rated uninterrupted current.
• Three-pole configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR121/P-LSI R4000 electronic overcurrent release.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Four auxiliary contacts for signalling.
• Circuit-breaker open/closed position indication.
• Designed for high-current low-voltage switchboards and distribution systems.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4V provide switching and overcurrent protection for major low-voltage distribution circuits. The electronic trip unit monitors current conditions and initiates circuit-breaker operation when configured overload or short-circuit thresholds are exceeded, helping protect cables, busbars, transformers and connected electrical equipment.

The PR121/P-LSI release combines long-time overload protection with short-time delayed and instantaneous short-circuit protection. These functions enable coordinated protection across complex distribution networks while the E4V platform provides the high-current capability required for major incoming and feeder circuits.

Typical Applications

• Main incoming circuit breakers in low-voltage switchboards.
• Industrial power distribution systems.
• High-current feeder protection.
• Commercial and infrastructure electrical distribution.
• Transformer secondary protection and switching.
• Manufacturing and process plants.
• Generator and utility distribution systems.
• Fixed switchboard installations requiring high-current circuit protection.