1SDA056492R1 ABB E3H2500 PR122/P-LSI 2500A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3H2500 PR122/P-LSI 2500A 4-Pole Air Circuit Breaker?

The ABB 1SDA056492R1 is a high-performance SACE Emax E3H air circuit breaker moving part designed for protection and switching in high-current low-voltage electrical distribution systems. Rated at 2500 A, this four-pole withdrawable configuration incorporates ABB’s PR122/P-LSI R2500 electronic overcurrent release for advanced protection of industrial, commercial and infrastructure power networks.

As part of the ABB SACE Emax range, the E3H2500 combines high short-circuit performance with configurable electronic protection. The PR122/P-LSI trip unit provides long-time, short-time and instantaneous protection functions, helping safeguard electrical installations against overloads and short circuits while supporting selective protection and coordination within low-voltage distribution systems.

The E3H2500 PR122/P-LSI has a rated uninterrupted current of 2500 A, a rated operational voltage of 690 V AC and an ultimate short-circuit breaking capacity of 100 kA at 400 V AC. This version is supplied as a four-pole withdrawable moving part, with four auxiliary contacts and circuit-breaker open/closed position indication for integration into maintainable high-current switchboards.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker moving part for demanding low-voltage power distribution.
• 2500 A rated current for high-current industrial and commercial installations.
• Four-pole construction for applications requiring switching of all four conductors.
• PR122/P-LSI R2500 electronic overcurrent release for advanced circuit protection.
• LSI protection provides long-time, short-time and instantaneous protection.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC.
• Withdrawable construction supports efficient inspection, servicing and circuit-breaker replacement.

Key Features

• ABB SACE Emax E3H2500 circuit breaker moving part.
• 2500 A rated uninterrupted current.
• Four-pole withdrawable configuration.
• PR122/P-LSI R2500 electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 100 kA Icu at 400 V AC.
• 85 kA Ics at 400 V AC.
• 75 kA short-time withstand current for 1 s.
• 12 kV rated impulse withstand voltage.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Advanced Four-Pole Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H2500 provide switching, isolation and protection for high-current low-voltage distribution circuits. The four-pole configuration enables switching of three phase conductors and the neutral, making it suitable for electrical systems where complete four-pole isolation is required.

The PR122/P-LSI electronic trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with the withdrawable Emax construction and high short-circuit performance, this makes the 1SDA056492R1 particularly suitable for main incomers, high-current feeders and other critical circuits where selective protection, four-pole switching and convenient maintenance are required.

Typical Applications

• Low-voltage main distribution switchboards.
• High-current industrial power distribution systems.
• Main incomer and feeder circuit protection.
• Three-phase systems requiring neutral switching.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Power distribution centres and withdrawable switchgear assemblies.