1SDA056914R1 ABB E4V 4000 PR121/P-LSIG 4000A 3P Fixed Air Circuit Breaker

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

The ABB 1SDA056914R1 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-LSIG R4000 electronic overcurrent release providing long-time, short-time, instantaneous and earth-fault 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 high breaking capacity, selective protection and dependable circuit interruption are required. Its fixed construction and rear horizontal terminals provide a robust arrangement for permanent integration into low-voltage switchboards.

With a rated uninterrupted current of 4000 A, rated operational voltage of 690 V AC and an ultimate short-circuit breaking capacity of 150 kA at 415 V AC, the E4V 4000 provides powerful protection for major incoming and distribution circuits. Its 100 kA short-time withstand current for 1 s further supports demanding installations with high prospective fault currents.

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-LSIG R4000 electronic overcurrent release.
• LSIG protection provides long-time, short-time, instantaneous and earth-fault protection functions.
• 150 kA ultimate breaking capacity at 415 V AC for high prospective fault levels.
• 100 kA short-time withstand current for 1 s.
• Fixed construction with rear horizontal terminals for switchboard integration.
• Four auxiliary contacts provide circuit-breaker open/closed position signalling.

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-LSIG R4000 electronic overcurrent release.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Earth-fault protection.
• 690 V AC rated operational voltage.
• Four auxiliary contacts with open/closed position indication.

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 continuously monitors circuit conditions and initiates breaker operation when configured overload, short-circuit or earth-fault thresholds are exceeded, helping protect cables, busbars, transformers and connected equipment.

The PR121/P-LSIG release combines four principal protection functions in one electronic unit. Long-time, short-time, instantaneous and earth-fault protection support coordinated electrical protection, while the E4V performance level provides the high breaking capacity required for demanding industrial and infrastructure distribution systems.

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 with high prospective fault currents.