1SDA056757R1 ABB SACE Emax E3L 2500 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA056757R1 SACE Emax E3L 2500 A Circuit Breaker?

The ABB 1SDA056757R1 is a high-performance SACE Emax E3L air circuit breaker designed for reliable switching and protection of high-current low-voltage electrical distribution systems. Its extended product designation is E3L2500PR122/P-LSIGIn=2500A3pFHR, combining a 2500 A rated current, three-pole fixed construction, rear horizontal terminals and ABB's advanced PR122/P-LSIG electronic overcurrent release.

As part of the ABB SACE Emax range, this E3L circuit breaker is engineered for demanding industrial, commercial and infrastructure power distribution applications. The PR122/P-LSIG R2500 electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection functions, helping safeguard busbars, cables, switchgear and connected equipment against overloads, short circuits and earth faults.

The 1SDA056757R1 features a three-pole fixed configuration with rear horizontal terminals, a rated permanent current of 2500 A and a rated voltage of 690 V AC. Its E3L performance level provides an ultimate short-circuit breaking capacity of 130 kA at 400 V AC, making it suitable for demanding high-fault-level distribution systems.

Key Advantages

• Heavy-duty ABB SACE Emax E3L air circuit breaker for low-voltage power distribution.
• 2500 A rated current for demanding high-current electrical installations.
• Three-pole fixed configuration for permanent switchboard installation.
• Advanced PR122/P-LSIG R2500 electronic overcurrent release.
• LSIG functionality provides long-time, short-time, instantaneous and ground-fault protection.
• 130 kA ultimate short-circuit breaking capacity at 400 V AC.
• Rear horizontal terminals support integration into compatible switchboard arrangements.
• Four auxiliary change-over contacts provide useful circuit-breaker status signalling.

Key Features

• ABB SACE Emax E3L series.
• 2500 A rated permanent current.
• Three-pole circuit-breaker construction.
• Fixed installation execution.
• Rear horizontal terminals.
• PR122/P-LSIG R2500 electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Integrated ground-fault protection.
• 690 V AC rated voltage.
• 130 kA Icu at 400 V AC.
• Four auxiliary change-over contacts.
• Circuit-breaker open/closed position indication.
• Optional motor operating mechanism capability.

Advanced LSIG Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E3L protect major low-voltage distribution circuits while providing dependable switching and isolation. The electronic protection release monitors electrical conditions and initiates tripping when configured protection thresholds are exceeded, helping safeguard cables, busbars, switchgear and downstream equipment from potentially damaging fault currents.

The PR122/P-LSIG release fitted to the 1SDA056757R1 provides comprehensive protection against overload, short-time and instantaneous short-circuit conditions, together with ground-fault protection. Combined with its 2500 A current rating, three-pole fixed construction and 130 kA breaking capacity at 400 V AC, this E3L circuit breaker is well suited to major distribution boards where advanced high-current protection is required.

Typical Applications

• Main low-voltage electrical distribution boards.
• Industrial power distribution systems.
• High-current incoming supplies and feeders.
• Commercial and infrastructure switchboards.
• Factory and manufacturing electrical installations.
• Transformer secondary distribution systems.
• Generator and standby power distribution systems.
• Installations requiring comprehensive LSIG electronic protection.
• High-fault-level low-voltage switchgear.
• OEM switchgear and panel-building applications.