1SDA056457R1 ABB E3H2000 PR121/P-LSI 2000A 4P Withdrawable Air Circuit Breaker

Why Choose the ABB E3H2000 PR121/P-LSI 2000A 4P Withdrawable Air Circuit Breaker?

The ABB E3H2000 PR121/P-LSI, order code 1SDA056457R1, is a high-performance SACE Emax air circuit breaker moving part designed for protection and switching in demanding low-voltage electrical distribution systems. This E3H breaker has a rated current of 2000 A, a four-pole configuration and ABB's PR121/P-LSI R2000 electronic overcurrent release.

Designed as the moving portion of a withdrawable circuit-breaker installation, the E3H2000 supports service-friendly integration with compatible SACE Emax E3 switchgear. Its H performance level provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC, making it suitable for high-current distribution systems with substantial prospective fault levels.

The PR121/P-LSI electronic release provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. Combined with its 2000 A rating, four-pole architecture and withdrawable moving-part construction, the 1SDA056457R1 is well suited to main incomers, high-current feeders and critical industrial power distribution circuits.

Key Advantages

• High-performance 2000 A SACE Emax air circuit breaker moving part.
• Four-pole configuration for suitable three-phase systems incorporating a neutral conductor.
• PR121/P-LSI electronic overcurrent release provides long-time, short-time and instantaneous protection functions.
• Withdrawable moving-part construction supports convenient isolation, servicing and switchboard maintenance.
• High E3H short-circuit performance with 100 kA Icu at 400 V AC.
• Four auxiliary change-over contacts and open/closed position indication support monitoring and control.

Key Features

• ABB SACE Emax E3H air circuit breaker moving part.
• 2000 A rated uninterrupted current.
• Four-pole configuration.
• PR121/P-LSI R2000 electronic overcurrent release.
• LSI protection functions for long-time, short-time delayed and instantaneous overcurrent protection.
• Overload release current setting range of 800–2000 A.
• Short-time delayed short-circuit adjustment range of 2000–20000 A.
• Instantaneous short-circuit adjustment range of 3000–30000 A.
• Rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC.
• Rated voltage of 690 V AC.
• Withdrawable moving-part version for compatible SACE Emax switchgear.
• Four auxiliary change-over contacts with circuit-breaker open/closed position indication.

Reliable LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H2000 protect high-current electrical distribution systems against damaging overload and short-circuit conditions. The PR121/P-LSI electronic release combines long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection, providing coordinated LSI protection for important low-voltage distribution circuits.

The withdrawable moving-part design is particularly valuable in industrial switchboards where serviceability and operational flexibility are important. When used with the appropriate compatible switchgear components, the breaker can support isolation and maintenance requirements while its 2000 A rating, four-pole architecture and E3H short-circuit performance provide robust protection for demanding power distribution systems.

Typical Applications

• Main incoming protection for industrial low-voltage switchboards.
• High-current feeder and distribution circuit protection.
• Manufacturing plants and process facilities.
• Commercial and infrastructure power distribution systems.
• Motor control centres and large electrical distribution assemblies.
• Withdrawable switchgear requiring coordinated overload and short-circuit protection.