1SDA057241R1 ABB E1B-A 1200 PR121/P-LI 1200A 3P Withdrawable Air Circuit Breaker

Why Choose the ABB E1B-A 1200 PR121/P-LI 1200A 3P Withdrawable Air Circuit Breaker?

The ABB E1B-A 1200 PR121/P-LI, order code 1SDA057241R1, is a high-performance SACE Emax air circuit breaker (ACB) designed for protection and switching in low-voltage power distribution systems. This three-pole model combines a 1200 A frame and rated current with ABB's B-level short-circuit performance for industrial switchboards, power distribution centres and other demanding electrical installations.

The breaker is equipped with an ABB PR121/P-LI electronic overcurrent release, providing long-time overload and instantaneous short-circuit protection. Electronic protection enables dependable response to damaging overcurrent conditions while helping protect cables, busbars, switchgear and connected equipment in critical distribution networks.

Configured as a three-pole withdrawable circuit breaker moving part, the E1B-A 1200 PR121/P-LI is designed for use with a compatible SACE Emax fixed part. The E1B-A 1200 platform provides a 42 kA short-circuit current rating at 480 V AC and a 42 kA short-time current rating, making it well suited to maintainable high-current switchboard installations.

Key Advantages

• High-capacity 1200 A SACE Emax air circuit breaker for low-voltage power distribution.
• Three-pole withdrawable configuration supports maintainable switchboard designs.
• Integrated PR121/P-LI electronic overcurrent release.
• LI protection provides long-time overload and instantaneous short-circuit protection.
• 42 kA short-circuit current rating at 480 V AC.
• 42 kA short-time current rating for demanding distribution applications.
• Withdrawable construction facilitates inspection, maintenance and replacement.
• Designed for feeder, incomer and general power distribution duties.

Key Features

• ABB SACE Emax E1B-A air circuit breaker.
• 1200 A frame size.
• 1200 A rated current.
• Three-pole (3P) configuration.
• Withdrawable (W) moving-part construction.
• PR121/P-LI electronic protection release.
• Long-time (L) overload protection.
• Instantaneous (I) short-circuit protection.
• B short-circuit performance level.
• 42 kA short-circuit current at 480 V AC.
• 42 kA short-time current.
• Designed for use with a compatible SACE Emax fixed part / cradle.

Reliable LI Protection for High-Current Distribution

Air circuit breakers such as the ABB SACE Emax E1B-A provide switching, isolation and overcurrent protection for important low-voltage distribution circuits. The PR121/P-LI electronic release monitors current conditions and combines long-time protection against sustained overloads with instantaneous operation when severe short-circuit currents occur.

The withdrawable construction is particularly valuable in installations where maintainability and system availability are priorities. The circuit-breaker moving part can be withdrawn from its compatible fixed part for servicing or replacement, while the E1B-A platform's 42 kA short-circuit and short-time current ratings provide robust performance for demanding power distribution duties.

Typical Applications

• Industrial low-voltage switchboards.
• Main incomer circuit protection.
• High-current feeder protection.
• Manufacturing and process plants.
• Commercial and infrastructure power distribution.
• Transformer secondary distribution systems.
• Power distribution centres.
• Withdrawable low-voltage switchgear assemblies.