1SDA056658R1 ABB E3V2500 PR121/P-LSIG 2500 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3V2500 PR121/P-LSIG 1SDA056658R1 Air Circuit Breaker?

The ABB 1SDA056658R1 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 circuit breaker combines a 2500 A rated uninterrupted current with advanced electronic protection and high short-circuit breaking performance for industrial, commercial and infrastructure power distribution applications.

The E3V2500 is equipped with an ABB PR121/P-LSIG R2500 electronic overcurrent release, providing long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. These L, S, I and G protection functions provide comprehensive protection against overloads, short circuits and earth faults while supporting selective coordination within complex electrical distribution networks.

With a rated uninterrupted current of 2500 A, a rated voltage of 690 V AC and a three-pole fixed configuration, the 1SDA056658R1 is well suited to main distribution boards, industrial switchboards and high-current feeder applications. Its rear horizontal terminals support permanent switchboard integration, while the E3 V performance level provides a rated ultimate short-circuit breaking capacity of 130 kA at 400 V AC.

Key Advantages

• High-performance ABB SACE Emax E3 V air circuit breaker for demanding low-voltage distribution systems.
• 2500 A rated uninterrupted current for high-current power distribution applications.
• Three-pole fixed configuration with rear horizontal terminals for switchboard integration.
• PR121/P-LSIG R2500 electronic release provides long-time, short-time, instantaneous and earth-fault protection.
• High 130 kA ultimate short-circuit breaking capacity at 400 V AC.
• Integrated earth-fault protection provides additional protection for demanding industrial distribution networks.

Key Features

• ABB SACE Emax E3 V series.
• 2500 A rated uninterrupted current.
• Three-pole fixed air circuit breaker.
• PR121/P-LSIG R2500 electronic overcurrent release.
• Long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection.
• 690 V AC rated voltage.
• 130 kA Icu at 400 V AC.
• 1000–2500 A overload release setting range.
• 2500–25000 A short-time delayed short-circuit setting range.
• 3750–37500 A instantaneous short-circuit setting range.
• Integrated earth-fault protection.
• Four auxiliary changeover contacts.
• Open/closed circuit-breaker position indication.
• Optional motor operating mechanism for automated switching applications.

Advanced 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-LSIG electronic release combines long-time overload, short-time delayed short-circuit, instantaneous short-circuit and earth-fault protection, helping safeguard switchboards, conductors and connected electrical equipment against a broad range of potentially damaging electrical faults.

The short-time protection function supports selective coordination between protective devices, while the integrated earth-fault function provides additional protection against ground-fault conditions. Combined with the high-breaking-capacity E3 V platform, a 2500 A rating and fixed rear-horizontal-terminal construction, the 1SDA056658R1 is particularly 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 and earth-fault protection.