1SDA057269R1 ABB E1B-A 1200 PR123/P-LSIG 1200A 3-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E1B-A 1200 PR123/P-LSIG 1200A 3-Pole Withdrawable Air Circuit Breaker?

The ABB 1SDA057269R1 is a SACE Emax E1B-A air circuit breaker moving part designed for switching and comprehensive protection of low-voltage electrical distribution systems. Part of the ABB New Emax product range, this UL configuration combines a 1200 A current rating with the advanced PR123/P-LSIG electronic overcurrent release for demanding industrial, commercial and infrastructure power applications.

This three-pole withdrawable circuit breaker moving part is equipped with the PR123/P-LSIG R1200 electronic overcurrent release. Its LSIG protection functions provide long-time overload (L), selective short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection, supporting coordinated protection against multiple electrical fault conditions.

The 1SDA057269R1 is specified with an 18,000 A instantaneous protection setting and incorporates four auxiliary contacts with circuit-breaker open / closed position indication. Its withdrawable moving-part construction supports inspection, servicing and replacement within compatible ABB SACE Emax switchgear while maintaining a robust 1200 A three-phase protection platform.

Key Advantages

• 1200 A rated current for substantial low-voltage distribution circuits.
• Three-pole configuration for three-phase electrical systems.
• Advanced PR123/P-LSIG R1200 electronic protection release.
• Comprehensive LSIG protection covering overload, selective short-circuit, instantaneous short-circuit and earth-fault conditions.
• 18,000 A instantaneous protection setting for this specific configuration.
• Withdrawable moving-part design supports maintenance, inspection and replacement within compatible switchgear.
• Four auxiliary contacts provide circuit-breaker open / closed position indication.
• UL configuration for applications designed around the corresponding certification framework.

Key Features

• ABB SACE Emax E1B-A series.
• 1200 A rated current.
• 3-pole withdrawable moving part.
• PR123/P-LSIG R1200 electronic trip unit.
• Long-time overload (L) protection.
• Selective short-circuit (S) protection.
• Instantaneous short-circuit (I) protection.
• Earth-fault (G) protection.
• 18,000 A instantaneous protection setting.
• Four auxiliary contacts.
• Open / closed circuit-breaker position indication.
• Withdrawable configuration for compatible ABB SACE Emax switchgear.
• UL version.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E1B-A 1200 provide switching and protection for substantial low-voltage distribution circuits. The electronic overcurrent release monitors electrical conditions and initiates circuit interruption when configured protection thresholds are exceeded, helping protect busbars, cables, transformers and connected equipment against damaging overload, short-circuit and earth-fault conditions.

The PR123/P-LSIG release combines long-time overload, selective short-circuit, instantaneous short-circuit and earth-fault protection in an advanced electronic protection package. Together with the E1B-A's 1200 A current rating and withdrawable moving-part construction, the 1SDA057269R1 provides a serviceable solution for switchboards requiring comprehensive three-phase circuit protection.

Typical Applications

• Low-voltage main distribution switchboards.
• Withdrawable industrial switchgear assemblies.
• High-current incoming and feeder circuits.
• Manufacturing and process plants.
• Commercial building power distribution.
• Infrastructure electrical systems.
• Transformer secondary protection and switching.
• Three-phase distribution systems requiring overload, short-circuit and earth-fault protection.