1SDA056489R1 ABB E3H2500PR121/P-LSI 2500 A 4-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E3H2500PR121/P-LSI Air Circuit Breaker?

The ABB E3H2500PR121/P-LSI is a high-performance four-pole withdrawable air circuit breaker moving part designed for protection, switching and isolation in demanding low-voltage electrical distribution systems. Part of the established ABB SACE Emax E3H series, this configuration combines a 2500 A rated uninterrupted current with the PR121/P-LSI R2500 electronic overcurrent release.

The PR121/P-LSI R2500 electronic trip unit provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. These LSI functions help protect conductors, busbars, switchgear and connected equipment against sustained overloads and severe short circuits while supporting selective coordination across high-current distribution networks.

The ABB 1SDA056489R1 is specifically configured as the four-pole moving portion of a withdrawable E3H2500 circuit breaker. Rated for operation up to 690 V AC, it provides an ultimate short-circuit breaking capacity of 100 kA at 220–500 V AC and is fitted with four auxiliary change-over contacts plus circuit-breaker open/closed position indication.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker moving part for demanding low-voltage distribution systems.
• 2500 A rated uninterrupted current for high-current electrical installations.
• Four-pole configuration for four-conductor switching and protection.
• PR121/P-LSI R2500 electronic trip unit provides long-time, short-time and instantaneous protection.
• 100 kA Icu at 220–500 V AC for installations with substantial prospective fault currents.
• Withdrawable moving-part construction supports maintainable draw-out switchgear installations.
• Four auxiliary change-over contacts and open/closed indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E3H series.
• 2500 A rated uninterrupted current.
• Four-pole circuit breaker configuration.
• PR121/P-LSI R2500 electronic overcurrent release.
• LSI protection functions: long-time, short-time and instantaneous.
• 690 V AC rated operational voltage.
• 100 kA Icu at 220–500 V AC.
• 85 kA Icu at 660–690 V AC.
• Withdrawable moving part (W MP) configuration.
• Four auxiliary change-over contacts with circuit-breaker open/closed position indication.

Selective LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H provide protection, switching and isolation for major low-voltage distribution circuits. The E3H platform combines high short-circuit interruption capability with electronic protection, making it suitable for main incomers, bus couplers, high-current feeders and other critical circuits where substantial load and prospective fault currents may occur.

The PR121/P-LSI R2500 release combines long-time protection against sustained overloads, short-time delayed protection for selective short-circuit clearing and instantaneous protection against severe faults. The withdrawable construction allows the moving portion to interface with the appropriate E3 fixed part, supporting inspection, servicing and replacement within suitably configured draw-out switchgear assemblies.

Typical Applications

• Main low-voltage distribution switchboards.
• Withdrawable industrial switchgear assemblies.
• Main incomer and bus-coupler applications.
• High-current distribution feeders.
• Industrial power distribution systems.
• Manufacturing plants and process facilities.
• Generator and transformer distribution systems.