1SDA057791R1 ABB E3V-A 2500 PR121/P-LSIG 2500 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3V-A 2500 PR121/P-LSIG 1SDA057791R1 Air Circuit Breaker?

The ABB E3V-A 2500 PR121/P-LSIG, order code 1SDA057791R1, is a high-performance three-pole fixed air circuit breaker (ACB) from the ABB SACE New Emax range, designed for protection and switching in demanding low-voltage electrical distribution systems. Rated at 2500 A, this E3V-A configuration combines robust Emax circuit breaker technology with the PR121/P-LSIG electronic overcurrent release.

The PR121/P-LSIG trip unit provides long-time, short-time, instantaneous and ground-fault protection, helping protect electrical installations, conductors and connected equipment against overloads, short circuits and earth faults. The breaker is equipped with an R2500 overcurrent release and an instantaneous protection setting of 37,500 A, providing rapid response to severe short-circuit conditions.

With a rated current of 2500 A and a three-pole configuration, the 1SDA057791R1 is designed for high-current three-phase power distribution. This version features fixed installation with horizontal rear terminals, together with four auxiliary contacts and open/closed position indication for integration into industrial and commercial switchgear.

Key Advantages

• High-performance ABB SACE New Emax air circuit breaker for demanding low-voltage distribution.
• 2500 A rated current for high-current industrial and commercial applications.
• Three-pole configuration for three-phase electrical distribution systems.
• PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• LSIG functions provide long-time, short-time, instantaneous and ground-fault protection.
• 37,500 A instantaneous protection setting for severe short-circuit conditions.
• Fixed construction with horizontal rear terminals for permanent switchboard installation.

Key Features

• ABB SACE New Emax E3V-A circuit breaker platform.
• 2500 A rated current.
• Three-pole configuration.
• PR121/P-LSIG electronic trip unit.
• R2500 overcurrent release.
• 37,500 A instantaneous protection setting.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Ground-fault protection.
• Fixed (F) breaker construction.
• Horizontal rear (HR) terminals.
• Four auxiliary contacts.
• Open/closed breaker position indication.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE New Emax E3V-A are designed to protect high-current low-voltage electrical distribution systems against overload, short-circuit and ground-fault conditions. The electronic trip unit monitors circuit current and initiates breaker operation when configured protection thresholds are exceeded, helping safeguard cables, switchgear and connected electrical equipment.

The PR121/P-LSIG electronic release provides four key protection functions covering long-time overloads, short-time faults, instantaneous short circuits and ground faults. Combined with the E3V-A platform and its 2500 A current rating, the 1SDA057791R1 is well suited to demanding power distribution systems requiring comprehensive electronic protection and dependable high-current switching.

Typical Applications

• Industrial low-voltage power distribution systems.
• Main incoming and distribution switchboards.
• Industrial plants and manufacturing facilities.
• Commercial building electrical distribution.
• High-current feeder and circuit protection.
• Power distribution centres and switchgear assemblies.