1SDA057235R1 ABB E1B-A 800 PR123/P-LSIG 800A 3P Fixed Air Circuit Breaker

Why Choose the ABB E1B-A 800 PR123/P-LSIG 800A 3P Fixed Air Circuit Breaker?

The ABB E1B-A 800 PR123/P-LSIG, order code 1SDA057235R1, is a high-performance SACE Emax air circuit breaker designed for reliable protection, switching and isolation in low-voltage electrical distribution systems. This three-pole E1B-A circuit breaker has a rated current of 800 A and incorporates ABB's advanced PR123/P-LSIG electronic overcurrent release.

Part of the ABB SACE Emax range, the E1B-A combines robust circuit-breaker construction with sophisticated electronic protection for industrial, commercial and infrastructure power systems. The PR123/P-LSIG trip unit provides long-time, short-time, instantaneous and earth-fault protection functions, helping safeguard conductors, switchgear and connected equipment against overloads and fault currents.

This model is supplied in a three-pole fixed configuration, making it suitable for permanent installation within compatible low-voltage switchboards and distribution assemblies. Its PR123/P release provides advanced protection and measurement capabilities for applications where accurate circuit monitoring and dependable fault protection are required.

Key Advantages

• Reliable 800 A SACE Emax air circuit breaker for low-voltage power distribution.
• Three-pole configuration suitable for three-phase electrical systems.
• Advanced PR123/P-LSIG electronic trip unit for comprehensive circuit protection.
• LSIG functions provide long-time, short-time, instantaneous and earth-fault protection.
• Fixed installation design for integration into compatible switchboards and distribution assemblies.
• Advanced electronic protection supports selective and coordinated power distribution systems.

Key Features

• ABB SACE Emax E1B-A series.
• 800 A rated current.
• Three-pole construction.
• PR123/P-LSIG electronic overcurrent release.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• Advanced electrical measurement and protection capabilities.
• Fixed circuit-breaker configuration.
• Designed for low-voltage AC distribution systems.
• Suitable for main incoming, feeder and distribution protection duties.

Advanced Protection for Low-Voltage Power Distribution

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

The PR123/P-LSIG release is designed for applications requiring advanced protection, measurement and coordination capabilities. Combined with the robust SACE Emax platform, it makes this E1B-A breaker suitable for critical distribution points where reliable operation and accurate electronic protection are essential.

Typical Applications

• Low-voltage power distribution switchboards.
• Industrial electrical distribution systems.
• Main incoming circuit protection.
• High-capacity feeder protection.
• Commercial building electrical infrastructure.
• Manufacturing and process installations.