1SDA056935R1 ABB E4V4000PR123/P-LSIG 4000 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E4V4000PR123/P-LSIG 4000 A Air Circuit Breaker?

The ABB E4V4000PR123/P-LSIG, order code 1SDA056935R1, is a high-performance SACE Emax E4 V air circuit breaker moving part designed for protection, switching and isolation in demanding low-voltage power distribution systems. Rated at 4000 A, this three-pole withdrawable unit combines the high breaking-performance E4 V platform with ABB's advanced PR123/P-LSIG electronic overcurrent release.

As part of the ABB SACE Emax range, the breaker is engineered for industrial switchboards, infrastructure and high-current electrical distribution applications where dependable protection and selective fault management are essential. The PR123/P trip unit provides LSIG protection functions covering overload, short-circuit, instantaneous and earth-fault protection.

This configuration is a three-pole withdrawable moving part with a rated current of 4000 A. It is supplied with the PR123/P-LSIG R4000 electronic overcurrent release, four auxiliary contacts and open/closed position indication, providing a comprehensive solution for high-capacity low-voltage switchgear installations.

Key Advantages

• High-capacity 4000 A SACE Emax air circuit breaker for demanding power distribution systems.
• E4 V high-performance breaker platform for industrial low-voltage installations.
• Advanced PR123/P-LSIG electronic trip unit for comprehensive circuit protection.
• LSIG protection functions cover overload, short-circuit, instantaneous and earth-fault conditions.
• Three-pole withdrawable configuration supports maintainable switchboard installations.
• Supplied with four auxiliary contacts and open/closed position indication.
• ABB SACE Emax construction provides dependable operation in critical electrical distribution applications.

Key Features

• ABB SACE Emax E4 V series.
• 4000 A rated current.
• Three-pole configuration.
• Withdrawable moving part execution.
• PR123/P-LSIG R4000 electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• Earth-fault protection (G).
• Four auxiliary contacts with open/closed position indication.
• Designed for high-current low-voltage switchboards and power distribution systems.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4 are used to protect high-current low-voltage distribution systems against abnormal operating conditions and electrical faults. Their withdrawable construction is particularly suited to switchboards where inspection, maintenance and replacement need to be performed efficiently while maintaining a robust distribution architecture.

The PR123/P-LSIG electronic release provides sophisticated protection across the principal fault categories encountered in industrial power systems. Long-time, short-time, instantaneous and earth-fault protection functions allow the breaker to protect conductors and connected equipment while supporting coordinated and selective protection strategies throughout the electrical installation.

Typical Applications

• Main incoming protection for low-voltage switchboards.
• High-current industrial power distribution systems.
• Manufacturing and process plant electrical infrastructure.
• Power distribution centres and main switchboards.
• Commercial and infrastructure electrical installations.
• Generator and transformer distribution systems.
• Critical power and large-scale electrical distribution networks.