1SDA056573R1 ABB E3V1250 PR122/P-LSIG 1250A 4P Fixed Air Circuit Breaker

Why Choose the ABB E3V1250 PR122/P-LSIG 1250A 4P Fixed Air Circuit Breaker?

The ABB E3V1250 PR122/P-LSIG, order code 1SDA056573R1, is a high-performance SACE Emax air circuit breaker (ACB) designed for protection and switching in demanding low-voltage power distribution systems. As part of the advanced ABB SACE Emax E3 series, this four-pole fixed circuit breaker combines a 1250 A rated current with the PR122/P-LSIG electronic overcurrent release for comprehensive circuit protection.

This E3V breaker is supplied in a fixed four-pole configuration with horizontal rear terminals, making it suitable for integration into industrial switchboards and power distribution assemblies. The PR122/P-LSIG R1250 electronic release provides long-time, short-time, instantaneous and earth-fault protection, helping safeguard electrical installations against overloads, short circuits and earth faults.

With a rated uninterrupted current of 1250 A and an ultimate short-circuit breaking capacity of 130 kA at 400 V AC, 50 Hz, the E3V1250 is engineered for installations with demanding prospective fault currents. Its adjustable overload, short-time and instantaneous protection settings enable coordinated protection across complex low-voltage distribution networks.

Key Advantages

• High-performance ABB SACE Emax E3V air circuit breaker for low-voltage distribution.
• 1250 A rated uninterrupted current for high-current electrical systems.
• Four-pole fixed configuration for industrial switchboard installations.
• Advanced PR122/P-LSIG R1250 electronic overcurrent release.
• Provides long-time, short-time, instantaneous and earth-fault protection.
• High 130 kA ultimate short-circuit breaking capacity at 400 V AC.
• Horizontal rear terminals support practical switchboard busbar connections.
• Auxiliary contacts and status indication support integration with monitoring and control systems.

Key Features

• ABB SACE Emax E3V series.
• 1250 A rated uninterrupted current (Iu).
• Four-pole circuit-breaker configuration.
• Fixed installation version.
• Horizontal rear terminals.
• PR122/P-LSIG R1250 electronic overcurrent release.
• LSIG protection functions for long-time, short-time, instantaneous and earth-fault protection.
• 130 kA Icu at 400 V AC, 50 Hz.
• Adjustable 400–1250 A overload protection range.
• Adjustable 750–12500 A short-time short-circuit protection range.
• Adjustable 1875–18750 A instantaneous short-circuit protection range.
• IP20 protection rating.
• Motor operating mechanism available as an optional accessory.

Advanced LSIG Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3V provide switching, isolation and overcurrent protection for high-current low-voltage distribution systems. Their high fault-interruption capability helps protect switchboards, cables, transformers and connected electrical equipment against damaging overload and short-circuit conditions.

The PR122/P-LSIG electronic release adds integrated earth-fault protection to its long-time, short-time and instantaneous protection functions. Combined with adjustable protection settings, fixed construction and horizontal rear connections, the 1SDA056573R1 provides a versatile protection solution for coordinated industrial power distribution.

Typical Applications

• Industrial low-voltage switchboards and distribution systems.
• Main incoming and feeder circuit protection.
• Transformer secondary protection.
• Manufacturing and process plants.
• Commercial building and infrastructure power distribution.
• High-current installations requiring integrated earth-fault protection.