1SDA057505R1 ABB E3S-A 2000 PR121/P-LSIG 2000 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA057505R1 E3S-A 2000 Air Circuit Breaker?

The ABB 1SDA057505R1 is a SACE Emax E3S-A air circuit breaker moving part designed for switching and protection in demanding low-voltage electrical distribution systems. Identified as E3S-A 2000 PR121/P-LSIG In=2000A 3p W MP, this three-pole withdrawable breaker combines a 2000 A rated current with the ABB PR121/P-LSIG electronic overcurrent release.

As part of the ABB SACE Emax / New Emax range, this E3S-A configuration uses a withdrawable moving-part design for integration with the appropriate fixed part. The withdrawable architecture supports switchgear installations where inspection, servicing and replacement flexibility are important considerations.

The PR121/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and earth-fault protection. This configuration incorporates an R2000 overcurrent release with a 30,000 A instantaneous release reference and is fitted with four auxiliary contacts plus circuit-breaker open/closed position indication.

Key Advantages

• ABB SACE Emax E3S-A construction for demanding low-voltage power distribution.
• 2000 A rated current for high-capacity industrial and commercial circuits.
• PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• LSIG functionality provides long-time, short-time, instantaneous and earth-fault protection.
• Three-pole withdrawable configuration supports maintainable switchgear installations.
• R2000 overcurrent release matched to the 2000 A rated current.
• Four auxiliary contacts support signalling and control functions.
• Open/closed position indication supports circuit-breaker status monitoring.

Key Features

• ABB SACE Emax E3S-A series.
• 2000 A rated current.
• Three-pole configuration.
• Withdrawable (W) moving part (MP).
• PR121/P-LSIG electronic trip unit.
• R2000 overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Earth-fault protection.
• 30,000 A instantaneous release reference.
• Four auxiliary contacts.
• Circuit-breaker open/closed position indication.
• UL configuration.

Comprehensive LSIG Protection for High-Current Distribution

Air circuit breakers such as the ABB SACE Emax E3S-A provide switching, isolation and overcurrent protection for low-voltage electrical distribution systems. Electronic trip technology monitors circuit conditions and initiates interruption when configured protection thresholds are exceeded, helping safeguard conductors, switchgear and downstream electrical equipment.

The PR121/P-LSIG release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Together with the withdrawable E3S-A architecture, the 1SDA057505R1 provides a practical solution for high-current distribution networks requiring comprehensive electronic protection and convenient access for switchgear inspection and maintenance.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial incoming and feeder circuits.
• Manufacturing and process facilities.
• Commercial building electrical distribution.
• Infrastructure power systems.
• Transformer secondary distribution circuits.
• Generator distribution circuits.
• High-current distribution feeders.
• Withdrawable switchgear requiring electronic LSIG protection.