1SDA056112R1 ABB E3N2500 PR121/P-LI 2500 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3N2500 PR121/P-LI 1SDA056112R1 Air Circuit Breaker?

The ABB 1SDA056112R1 is a robust SACE Emax E3N2500 air circuit breaker designed for switching and protection in high-current low-voltage electrical distribution systems. Part of the ABB New Emax range, this three-pole fixed circuit breaker has a rated uninterrupted current of 2500 A and incorporates the PR121/P-LI R2500 electronic overcurrent release.

The PR121/P-LI trip unit provides long-time overload and instantaneous short-circuit protection, helping protect conductors, switchgear, transformers and connected equipment against damaging overcurrent conditions. The E3N2500 provides a rated ultimate and service short-circuit breaking capacity of 65 kA across its specified AC voltage range.

With a rated operational voltage of up to 690 V AC, three-pole configuration and fixed construction with rear flat horizontal terminals, the E3N2500 is well suited to high-current switchboards and main distribution panels. Four auxiliary change-over contacts and circuit-breaker open/closed position indication support integration with switchboard control and signalling systems.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker for high-current low-voltage distribution.
• 2500 A rated uninterrupted current for demanding electrical installations.
• PR121/P-LI R2500 electronic release provides overload and instantaneous short-circuit protection.
• 65 kA Icu and Ics across the specified 220–690 V AC range.
• 65 kA short-time withstand current for 1 s and 3 s.
• Three-pole configuration suitable for three-phase distribution circuits.
• Fixed construction with rear flat horizontal terminals for permanent switchboard installation.
• Four auxiliary change-over contacts and open/closed position indication support control and signalling applications.

Key Features

• ABB SACE Emax E3N2500 air circuit breaker.
• 2500 A rated uninterrupted current.
• Three-pole configuration.
• PR121/P-LI R2500 electronic overcurrent release.
• L protection: long-time overload protection.
• I protection: instantaneous short-circuit protection.
• 65 kA Icu/Ics at 220–690 V AC.
• 65 kA Icw for 1 s and 3 s.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Fixed F version with rear flat horizontal terminals.
• Fitted with four auxiliary change-over contacts.

Reliable Protection for Low-Voltage Distribution Systems

The ABB SACE Emax E3N2500 is engineered for high-current low-voltage distribution duties where dependable circuit protection and substantial short-circuit withstand capability are required. Its 2500 A rating and 65 kA short-circuit breaking capacity make it suitable for protecting major distribution circuits, switchboards, transformer-fed systems and industrial electrical installations.

The PR121/P-LI electronic release combines adjustable long-time overload protection with instantaneous short-circuit protection. Together with the fixed three-pole E3N platform and rear flat horizontal connection arrangement, these functions make the 1SDA056112R1 a practical solution for main incomers and high-current feeders requiring reliable electronic protection and permanent switchboard installation.

Typical Applications

• Industrial low-voltage switchboards.
• Main electrical distribution panels.
• Incoming mains and feeder protection.
• Manufacturing and process industry electrical systems.
• Commercial and infrastructure power distribution.
• Transformer and installation protection.
• High-current three-pole distribution circuits.