1SDA056458R1 ABB E3H2000PR121/P-LSIG 2000 A 4-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E3H2000PR121/P-LSIG Air Circuit Breaker?

The ABB E3H2000PR121/P-LSIG is a high-performance four-pole withdrawable air circuit breaker moving part designed for comprehensive protection, switching and isolation in demanding low-voltage electrical distribution systems. Part of the established ABB SACE Emax E3H series, this configuration combines a 2000 A rated uninterrupted current with the PR121/P-LSIG electronic overcurrent release.

The PR121/P-LSIG R2000 electronic trip unit provides long-time overload, short-time delayed short-circuit, instantaneous short-circuit and ground-fault protection. These LSIG functions help protect conductors, switchgear and connected equipment against sustained overloads, severe phase faults and ground-fault conditions while supporting coordinated protection throughout low-voltage distribution networks.

The ABB 1SDA056458R1 is specifically configured as the four-pole moving portion of a withdrawable E3H2000 circuit breaker. It is rated for operation up to 690 V AC, offers an ultimate short-circuit breaking capacity of 100 kA at 400 V AC, and is fitted with four auxiliary change-over contacts plus open/closed circuit-breaker position indication.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker moving part for demanding low-voltage distribution systems.
• 2000 A rated uninterrupted current for high-current electrical installations.
• Four-pole configuration for four-conductor switching and protection.
• PR121/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection.
• 100 kA Icu at 400 V AC for installations with high prospective fault currents.
• Withdrawable moving-part construction supports maintainable draw-out switchgear installations.
• Four auxiliary change-over contacts and open/closed position indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E3H series.
• 2000 A rated uninterrupted current.
• Four-pole circuit breaker configuration.
• PR121/P-LSIG R2000 electronic overcurrent release.
• LSIG protection functions: long-time, short-time, instantaneous and ground fault.
• 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.

Comprehensive LSIG Protection for High-Current Distribution

Air circuit breakers such as the ABB SACE Emax E3H provide switching, isolation and protection 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 and other critical circuits where substantial load and prospective fault currents may occur.

The PR121/P-LSIG release combines long-time, short-time, instantaneous and ground-fault protection to provide comprehensive coverage against common distribution-system fault conditions. Its withdrawable construction allows the moving portion to interface with the appropriate 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.
• Industrial power distribution systems requiring ground-fault protection.
• Manufacturing plants and process facilities.
• Power distribution centres and electrical substations.
• Generator and transformer distribution systems.