The ABB 1SDA055744R1 E1N 1250 PR121/P-LI is a moving part specifically designed for the SACE Emax series circuit breakers, engineered to deliver high-reliability protection for medium-voltage systems. This component ensures efficient overcurrent protection and operational safety for demanding industrial applications. Here’s an in-depth look at its specifications, features, and applications:

Key Specifications:

• Model: ABB 1SDA055744R1 E1N 1250 PR121/P-LI
• Rated Current (In): 1250A
• Poles: 3-pole design, suitable for three-phase electrical systems.
• Protection Unit: PR121/P-LI.
• Auxiliary Contacts: Fitted with 4 auxiliary contacts, allowing for monitoring and additional control options.
• Breaker Position Indicator: Displays Open/Closed status for improved operational visibility and safety.

Features:

• Comprehensive Overcurrent Protection: The PR121/P-LI unit offers configurable settings for overload and short-circuit protection, enhancing safety and reliability in electrical systems.
• Rugged Construction: Designed with high-quality materials for durability in demanding industrial environments, ensuring long-lasting performance.
• Enhanced Operational Safety: The Open/Closed position indicator gives a quick and clear view of the breaker’s status, helping operators ensure safe working conditions during maintenance and other operations.

Applications:

The ABB 1SDA055744R1 is ideal for medium-voltage circuit breaker applications across various industries, such as manufacturing, industrial plants, and commercial facilities. It provides essential protection for electrical distribution systems, safeguarding against potential damage from overloads and faults.

Additional Information:

• Compatibility: Specifically designed for ABB’s SACE Emax series, making it suitable for both new installations and retrofits in existing systems.
• Dependable Performance: Delivers efficient protection and contributes to the overall safety and uptime of the electrical system.