1SDA056770R1 ABB E3L2500 PR121/P-LSIG 2500 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3L2500 PR121/P-LSIG Air Circuit Breaker?

The ABB 1SDA056770R1 is a high-performance SACE Emax E3L air circuit breaker moving part designed for switching and protection in high-current low-voltage electrical distribution systems. Identified as E3L2500PR121/P-LSIG, this three-pole withdrawable circuit breaker combines a 2500 A rated current with ABB's PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.

As part of the ABB SACE Emax / New Emax E3 range, the E3L2500 is engineered for demanding industrial, commercial and infrastructure power distribution applications. The E3L 2500 frame provides an ultimate short-circuit breaking capacity of 130 kA at 415 V AC and a rated short-time withstand current of 15 kA for 1 s. Its withdrawable moving-part construction supports convenient inspection, servicing and maintenance when installed with the corresponding fixed part.

The integrated PR121/P-LSIG electronic trip unit provides long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and ground-fault (G) protection. With a 2500 A rated uninterrupted current, three-pole configuration and comprehensive LSIG protection, the 1SDA056770R1 is well suited to main incoming, feeder and distribution protection duties in substantial low-voltage installations.

Key Advantages

• High-capacity 2500 A air circuit breaker moving part for low-voltage power distribution.
• Three-pole configuration for three-phase electrical systems.
• PR121/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection.
• High 130 kA Icu at 415 V AC ultimate short-circuit breaking capacity.
• 15 kA short-time withstand current for 1 s.
• Withdrawable construction supports convenient inspection, servicing and maintenance.
• Ground-fault protection provides an additional level of protection for electrical distribution systems.
• Part of ABB's proven SACE Emax circuit breaker range for demanding power distribution applications.

Key Features

• ABB SACE Emax E3L series.
• 2500 A rated uninterrupted current.
• Three-pole circuit breaker configuration.
• PR121/P-LSIG electronic overcurrent release.
• Long-time overload, short-time, instantaneous and ground-fault protection.
• 130 kA ultimate short-circuit breaking capacity at 415 V AC.
• 15 kA rated short-time withstand current for 1 s.
• Withdrawable moving-part design.
• Designed for integration with the corresponding Emax fixed part.
• Suitable for high-current low-voltage switchgear and distribution assemblies.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB E3L2500 provide switching and protection for high-current low-voltage distribution systems. The circuit breaker interrupts abnormal current conditions to help protect cables, busbars, switchgear and connected equipment against damage caused by overloads, short circuits and ground faults.

The PR121/P-LSIG electronic release provides long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. Combined with the E3L's high breaking performance and withdrawable construction, this makes the 1SDA056770R1 suitable for distribution boards, switchboards and industrial installations where comprehensive electrical protection and straightforward maintenance are required.

Typical Applications

• Main incoming circuit protection in low-voltage switchboards.
• Industrial power distribution systems.
• Transformer and generator secondary distribution systems.
• Protection of distribution feeders and busbar systems.
• Large commercial and infrastructure electrical installations.
• Manufacturing plants and process facilities.
• High-current switchgear and electrical distribution installations.