1SDA056745R1 ABB E3L2000 PR121/P-LSI 2000 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3L2000 PR121/P-LSI Air Circuit Breaker?

The ABB E3L2000 PR121/P-LSI, order code 1SDA056745R1, is a high-performance SACE Emax air circuit breaker moving part designed for switching and overcurrent protection in demanding low-voltage power-distribution systems. Part of the ABB SACE Emax E3 series, this four-pole withdrawable configuration combines a 2000 A rated current with the PR121/P-LSI R2000 electronic overcurrent release.

The PR121/P-LSI release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. These LSI functions help protect conductors, switchboards and downstream electrical equipment while allowing coordinated protection between devices in complex industrial and commercial distribution networks.

This model is the four-pole withdrawable moving part of the E3L circuit breaker and is intended for use with the corresponding SACE Emax fixed part. It is fitted with four auxiliary contacts and open/closed position indication, while the withdrawable design facilitates inspection and servicing in switchboards where maintainability and continuity of operation are important.

Key Advantages

• High-current 2000 A SACE Emax air circuit breaker moving part.
• PR121/P-LSI R2000 electronic release provides comprehensive LSI overcurrent protection.
• Long-time, short-time and instantaneous protection supports coordinated fault clearing.
• Four-pole configuration supports three-phase systems requiring neutral switching.
• Withdrawable construction facilitates inspection, maintenance and servicing.
• High 130 kA ultimate short-circuit breaking capacity at 400 V AC.
• Four auxiliary contacts and open/closed position indication support switchboard signalling and control.

Key Features

• ABB SACE Emax E3L2000 air circuit breaker moving part.
• 2000 A rated uninterrupted current.
• Four-pole withdrawable version.
• PR121/P-LSI R2000 electronic overcurrent release.
• L protection: long-time overload protection.
• S protection: short-time short-circuit protection.
• I protection: instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Four auxiliary contacts for signalling and control.
• Integrated circuit-breaker open/closed position indication.

Reliable LSI Protection for High-Current Power Distribution

The ABB SACE Emax E3L2000 is designed for switching and protection at main incomer and feeder levels within substantial low-voltage distribution systems. Its PR121/P-LSI electronic release provides long-time protection against sustained overload conditions, short-time protection for selective fault coordination and instantaneous intervention against severe short-circuit currents.

The combination of a 2000 A current rating, four-pole construction and withdrawable design makes the 1SDA056745R1 particularly suitable for switchboards where both electrical performance and serviceability are important. When installed with the corresponding fixed part, the moving circuit breaker can be withdrawn for inspection and maintenance, while the E3L performance level provides robust short-circuit interruption for demanding power-distribution networks.

Typical Applications

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