1SDA057261R1 ABB E1B-A 1200 PR122/P-LSIG 1200A 3P Withdrawable Air Circuit Breaker

Why Choose the ABB E1B-A 1200 PR122/P-LSIG 1200A 3P Withdrawable Air Circuit Breaker?

The ABB E1B-A 1200 PR122/P-LSIG, order code 1SDA057261R1, is a high-performance SACE Emax air circuit breaker moving part designed for protection, switching and isolation in low-voltage power distribution systems. This three-pole E1B-A breaker has a rated current of 1200 A and incorporates ABB's advanced PR122/P-LSIG electronic overcurrent release.

Part of the ABB SACE Emax range, the E1B-A combines robust circuit-breaker construction with comprehensive electronic protection for industrial, commercial and infrastructure electrical systems. The PR122/P-LSIG trip unit provides long-time, short-time, instantaneous and earth-fault protection functions, helping protect conductors, switchgear and connected equipment against overloads and fault currents.

This model is supplied as a three-pole withdrawable moving part for UL applications and uses a 1200 A rating plug. It is fitted with four auxiliary contacts and open/closed position indication, supporting integration with switchboard control, signalling and monitoring systems while allowing convenient isolation and servicing.

Key Advantages

• High-performance 1200 A SACE Emax air circuit breaker for low-voltage power distribution.
• Three-pole configuration suitable for three-phase electrical systems.
• Advanced PR122/P-LSIG electronic trip unit with comprehensive circuit protection.
• LSIG functions provide long-time, short-time, instantaneous and earth-fault protection.
• Withdrawable moving-part design supports convenient inspection, isolation and maintenance.
• Four auxiliary contacts and open/closed position indication facilitate switchboard monitoring and control.

Key Features

• ABB SACE Emax E1B-A series.
• 1200 A rated current.
• Three-pole construction.
• PR122/P-LSIG electronic overcurrent release.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• R1200 rating plug.
• Withdrawable circuit-breaker moving part.
• Four auxiliary contacts.
• Open/closed circuit-breaker position indication.
• UL configuration for compatible low-voltage switchgear.

Advanced Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E1B-A provide controlled switching and protection of high-current low-voltage distribution circuits. The electronic release monitors circuit conditions and initiates tripping when configured protection thresholds are exceeded, helping minimise damage caused by overloads, short circuits and earth faults.

The PR122/P-LSIG release provides adjustable electronic protection suited to coordinated electrical distribution systems. Combined with the withdrawable SACE Emax architecture, this makes the E1B-A particularly suitable for switchboards where dependable circuit protection, system availability and straightforward maintenance are important.

Typical Applications

• Low-voltage power distribution switchboards.
• Industrial electrical distribution systems.
• Main incoming circuit protection.
• High-current feeder protection.
• Commercial and infrastructure electrical systems.
• UL-configured switchgear and distribution assemblies.