1SDA056681R1 ABB E3V2500 PR121/P-LSI 2500 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3V2500 PR121/P-LSI Air Circuit Breaker?

The ABB E3V2500 PR121/P-LSI, order code 1SDA056681R1, is a high-performance SACE Emax air circuit breaker (ACB) moving part designed for switching and protection in demanding low-voltage power-distribution systems. Part of the ABB SACE Emax E3 series, this four-pole withdrawable configuration combines a 2500 A rated current with the PR121/P-LSI electronic overcurrent release.

The PR121/P-LSI release provides long-time, short-time and instantaneous overcurrent protection, helping protect conductors, switchboards and downstream equipment against overload and short-circuit conditions. Its adjustable electronic protection functions support coordinated protection schemes in industrial, commercial and infrastructure electrical distribution networks.

This model is a four-pole withdrawable moving part for the E3V frame and is supplied with four auxiliary contacts together with circuit-breaker open/closed position indication. Its withdrawable construction facilitates inspection and servicing when installed with the corresponding SACE Emax fixed part, making it particularly suitable for high-capacity switchboards where maintainability and continuity of service are important.

Key Advantages

• High-current 2500 A SACE Emax air circuit breaker moving part.
• PR121/P-LSI electronic overcurrent release provides comprehensive LSI protection.
• Long-time, short-time and instantaneous protection functions support coordinated distribution-system protection.
• Four-pole configuration supports switching and protection of three-phase systems with neutral.
• Withdrawable construction facilitates maintenance, inspection and servicing.
• High E3V short-circuit performance for demanding low-voltage installations.
• Supplied with four auxiliary contacts and open/closed position indication.

Key Features

• ABB SACE Emax E3V2500 air circuit breaker moving part.
• 2500 A rated uninterrupted current.
• Four-pole withdrawable version.
• PR121/P-LSI electronic overcurrent release.
• L protection: long-time overload protection.
• S protection: short-time short-circuit protection.
• I protection: instantaneous short-circuit protection.
• IP20 protection rating.
• Four auxiliary contacts.
• Integrated circuit-breaker open/closed position indication.
• Designed for high-current industrial and commercial power distribution.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3V2500 provide switching and overcurrent protection at main incomer and feeder levels within low-voltage distribution systems. The PR121/P-LSI electronic release monitors circuit current and provides long-time protection against sustained overloads, short-time protection for coordinated fault clearing and instantaneous protection against severe short-circuit currents.

The withdrawable E3V configuration is particularly suited to critical switchboards where accessibility and maintainability are important. When paired with the appropriate fixed part, the moving circuit-breaker section can be isolated and withdrawn for inspection or servicing, while the LSI release provides flexible protection for complex high-current 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.