1SDA057951R1 ABB E4V-A 3200 PR121/P-LSIG 3200 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E4V-A 3200 PR121/P-LSIG Air Circuit Breaker?

The ABB 1SDA057951R1 is a high-performance SACE Emax E4V-A 3200 air circuit breaker (ACB) designed for protection and switching of high-current low-voltage electrical distribution systems. Part of the ABB New Emax range, this fixed three-pole circuit breaker combines a 3200 A rated current with the electronic PR121/P-LSIG trip unit for comprehensive overload, short-circuit and earth-fault protection.

The E4V-A performance level is engineered for demanding industrial and commercial power distribution applications where high fault-current performance and dependable selective protection are required. Its PR121/P electronic overcurrent release provides Long-time, Short-time, Instantaneous and Ground-fault protection functions, identified by the LSIG designation, helping protect conductors, switchgear and connected equipment against a broad range of electrical faults.

With a rated current of 3200 A, three-pole configuration and fixed construction, the E4V-A 3200 is suited to substantial low-voltage distribution installations. ABB order code 1SDA057951R1 identifies the fixed version with horizontal rear terminals, PR121/P-LSIG R3200 overcurrent release, four auxiliary contacts and open/closed position indication.

Key Advantages

• High-capacity ABB SACE Emax air circuit breaker for low-voltage power distribution.
• 3200 A rated current for high-current industrial and commercial installations.
• E4V-A performance level designed for demanding power distribution applications.
• Electronic PR121/P-LSIG overcurrent release providing comprehensive circuit protection.
• LSIG protection covers Long-time, Short-time, Instantaneous and Ground-fault functions.
• Fixed three-pole construction with horizontal rear terminals for switchboard installation.

Key Features

• ABB New Emax E4V-A series.
• 3200 A rated current.
• Three-pole configuration.
• PR121/P electronic overcurrent release.
• LSIG protection functions for overload, selective short-circuit, instantaneous short-circuit and earth-fault protection.
• R3200 current rating for the fitted protection release.
• Fixed circuit breaker construction.
• Horizontal rear terminals for power connections.
• Fitted with four auxiliary contacts.
• Integrated open/closed position indication.

Reliable Circuit Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4V-A protect low-voltage distribution systems against overloads and short circuits while also providing controlled switching of high-current electrical circuits. Their robust construction and advanced electronic protection make them particularly suitable for main incomers, bus couplers and high-current feeder applications in industrial switchgear.

The PR121/P-LSIG electronic trip unit provides protection characteristics for coordinated electrical distribution. Long-time protection responds to sustained overload conditions, Short-time protection supports selective coordination, Instantaneous protection responds rapidly to severe short circuits, and Ground-fault protection helps detect potentially damaging earth-fault currents.

Typical Applications

• Main incoming circuit protection in low-voltage switchboards.
• Industrial power distribution systems.
• Bus coupler and bus-section circuit breaker applications.
• High-current feeder protection.
• Manufacturing plants and process facilities.
• Commercial buildings, infrastructure and large electrical installations.