1SDA056657R1 ABB E3V2500 PR121/P-LSI 2500 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3V2500 PR121/P-LSI 1SDA056657R1 Air Circuit Breaker?

The ABB 1SDA056657R1 is a high-performance SACE Emax E3 V air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. This three-pole fixed breaker combines a 2500 A rated current with the high short-circuit performance of the ABB E3 V platform, making it suitable for industrial, commercial and infrastructure power distribution applications.

The E3V2500 is equipped with an ABB PR121/P-LSI R2500 electronic overcurrent release, providing long-time overload, short-time short-circuit and instantaneous short-circuit protection. These L, S and I protection functions help protect conductors, switchgear and connected equipment while supporting selective coordination between protective devices within complex electrical distribution networks.

With a 2500 A rating, three-pole fixed construction and rear horizontal terminals, the 1SDA056657R1 is designed for permanent installation within compatible low-voltage switchboards. The combination of high-current capability, electronic protection and the E3 V breaking-performance class makes it particularly suitable for main incomers and high-capacity distribution feeders.

Key Advantages

• High-performance ABB SACE Emax E3 V air circuit breaker for demanding low-voltage distribution systems.
• 2500 A rated current for high-current power distribution applications.
• Three-pole fixed configuration for permanent integration into compatible switchboards.
• PR121/P-LSI R2500 electronic release provides long-time, short-time and instantaneous overcurrent protection.
• Short-time protection supports improved selectivity and coordination between protective devices.
• Rear horizontal terminals provide a practical connection arrangement for fixed switchboard installations.

Key Features

• ABB SACE Emax E3 V series.
• 2500 A rated current.
• Three-pole fixed air circuit breaker.
• PR121/P-LSI R2500 electronic overcurrent release.
• Long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection.
• High-performance E3 V breaking-capacity class.
• Rear horizontal terminals.
• Four auxiliary contacts.
• Open/closed circuit-breaker position indication.
• Designed for high-current low-voltage switchboards and distribution systems.

Selective Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3V2500 provide controlled switching and protection for high-current low-voltage distribution circuits. The PR121/P-LSI electronic release combines long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection, helping protect switchboards, conductors and connected electrical equipment against damaging overcurrent conditions.

The short-time protection function is particularly useful in distribution systems where selective coordination between upstream and downstream protective devices is required. Combined with the E3 V performance class, a 2500 A rating and fixed rear-horizontal-terminal construction, the 1SDA056657R1 is well suited to high-capacity switchboards where dependable protection and continuity of supply are important.

Typical Applications

• Main low-voltage electrical distribution boards.
• Industrial switchboards and switchgear assemblies.
• Manufacturing plants and process facilities.
• Commercial and infrastructure power distribution systems.
• High-current incomer and feeder circuit protection.
• Electrical networks requiring selective short-circuit protection.