1SDA056448R1 ABB E3H2000 PR121/P-LI 2000A 3P Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E3H2000 PR121/P-LI 2000A 3P W MP Air Circuit Breaker?

The ABB E3H2000 PR121/P-LI, order code 1SDA056448R1, is a high-performance SACE Emax air circuit breaker moving part designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the proven ABB SACE Emax E3H series, this three-pole breaker is rated at 2000 A and incorporates the electronic PR121/P-LI overcurrent release.

The PR121/P-LI release provides long-time and instantaneous overcurrent protection, helping protect distribution equipment and conductors against overload and short-circuit conditions. The E3H performance level is engineered for installations requiring substantial interruption capability, with the breaker supporting operational voltages up to 690 V AC.

This version is the withdrawable moving part configuration and is supplied with four auxiliary contacts together with circuit-breaker open/closed position indication. Its withdrawable construction supports maintainable switchboard installations where circuit breakers may need to be isolated or removed without dismantling the main power connections.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker for low-voltage power distribution.
• 2000 A rated current for high-current industrial and commercial installations.
• Three-pole configuration for three-phase electrical systems.
• Electronic PR121/P-LI overcurrent release provides long-time and instantaneous protection.
• Withdrawable moving-part design supports convenient isolation, inspection and maintenance.
• Rated operational voltage up to 690 V AC.
• High E3H short-circuit performance for demanding distribution applications.
• Supplied with four auxiliary contacts and open/closed circuit-breaker position indication.

Key Features

• ABB SACE Emax E3H series.
• 2000 A rated current.
• 3-pole configuration.
• PR121/P-LI electronic trip unit.
• Long-time overload and instantaneous short-circuit protection functions.
• Withdrawable moving part construction.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Four auxiliary contacts for signalling and control circuits.
• Open/closed circuit-breaker position indication.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H provide switching and overcurrent protection for high-current low-voltage distribution systems. By combining a robust breaker mechanism with an electronic trip unit, the Emax platform can detect abnormal current conditions and interrupt the circuit before excessive electrical or thermal stress causes serious damage to cables and downstream equipment.

The PR121/P-LI release fitted to this model provides long-time overload and instantaneous short-circuit protection. Combined with the E3H breaker frame and withdrawable construction, this makes the 1SDA056448R1 particularly suitable for switchboards where dependable protection, high interruption performance and maintainability are important design requirements.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Transformer secondary and incoming feeder protection.
• High-current outgoing feeder protection.
• Power distribution centres and electrical substations.
• Withdrawable switchgear requiring maintainable circuit protection.