1SDA056124R1 ABB E3N2500 PR122/P-LSI 2500 A 4P Fixed Air Circuit Breaker

Why Choose the ABB E3N2500 PR122/P-LSI Air Circuit Breaker?

The ABB E3N2500 PR122/P-LSI, order code 1SDA056124R1, is a four-pole fixed air circuit breaker (ACB) designed for high-current low-voltage power distribution and protection. Part of the ABB SACE Emax E3 series, it combines a rated uninterrupted current of 2500 A with the advanced PR122/P-LSI R2500 electronic overcurrent release.

The PR122/P-LSI release provides long-time, short-time and instantaneous protection, helping protect conductors, switchgear and connected equipment against sustained overloads and short-circuit conditions. Its adjustable electronic protection functions support selective coordination and dependable fault clearing in industrial, commercial and infrastructure electrical distribution systems.

This E3N2500 configuration uses fixed construction with rear flat horizontal terminals and is fitted with four change-over auxiliary contacts plus circuit-breaker open/closed position indication. With a rated operational voltage of 690 V AC and rated ultimate and service short-circuit breaking capacities of 65 kA, it provides robust protection for high-capacity switchboards and distribution networks.

Key Advantages

• Proven ABB SACE Emax E3N air circuit breaker platform.
• 2500 A rated uninterrupted current for high-current distribution applications.
• Four-pole configuration for comprehensive switching and isolation.
• Advanced PR122/P-LSI R2500 electronic overcurrent release.
• Long-time, short-time and instantaneous protection against overload and short-circuit conditions.
• 65 kA Icu and Ics across the specified AC operating-voltage range.
• 65 kA short-time withstand current for both 1-second and 3-second durations.
• Fixed construction with rear flat horizontal terminals for switchboard integration.
• Four change-over auxiliary contacts support signalling, monitoring and control functions.

Key Features

• ABB SACE Emax E3N series.
• 2500 A rated current.
• Four-pole fixed air circuit breaker.
• PR122/P-LSI R2500 electronic overcurrent release.
• LSI protection functions: Long-time, Short-time and Instantaneous.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 65 kA Icu and Ics at 400/415 V AC.
• 65 kA Icu and Ics at 690 V AC.
• 65 kA Icw for 1 s and 3 s.
• Rear flat horizontal main terminals.
• Four change-over auxiliary contacts.
• Open/closed circuit-breaker position indication.
• IEC-compliant construction.

Reliable High-Current LSI Protection for Power Distribution

The ABB SACE Emax E3N2500 is engineered for high-capacity low-voltage distribution systems requiring dependable switching, isolation and fault protection. Its 2500 A current rating, 65 kA short-circuit breaking capability and fixed rear-horizontal-terminal arrangement make it well suited to main switchboards, transformer-fed networks and large industrial distribution systems.

The PR122/P-LSI electronic release combines long-time overload protection, short-time protection for selective fault coordination and instantaneous protection against severe short circuits. Together with four change-over auxiliary contacts, open/closed position indication and a 65 kA short-time withstand capability, the E3N2500 provides robust protection and practical integration into critical low-voltage switchgear.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• High-current industrial power distribution systems.
• Manufacturing and process plant switchgear.
• Commercial and infrastructure electrical distribution.
• Transformer secondary protection and distribution.
• Generator and standby power installations.
• Main incomer and high-current feeder protection.
• Fixed switchgear requiring adjustable LSI overcurrent protection.