1SDA055871R1 ABB E2N1250 PR123/P-LSIG 1250A 4-Pole Air Circuit Breaker

Why Choose the ABB E2N1250 PR123/P-LSIG 1250A Air Circuit Breaker?

The ABB E2N1250 PR123/P-LSIG, order code 1SDA055871R1, is a high-performance four-pole air circuit breaker (ACB) designed for protection and switching in low-voltage electrical distribution systems. As part of the proven ABB SACE Emax series, this E2N circuit breaker combines a 1250 A rated current with the advanced PR123/P electronic trip unit for dependable protection in industrial, commercial and infrastructure power installations.

This configuration is supplied as a fixed four-pole circuit breaker with horizontal rear terminals. The integrated PR123/P-LSIG electronic overcurrent release provides long-time, short-time, instantaneous and ground-fault protection functions, helping protect electrical networks against overloads, short circuits and earth faults while providing advanced electronic protection and measurement capabilities.

With a rated current of 1250 A, the E2N1250 is suitable for high-current distribution boards, switchboards and industrial power systems. The E2N performance level provides an ultimate short-circuit breaking capacity of 65 kA at 415 V AC, while the fixed construction and horizontal rear connections support robust installation within low-voltage switchgear assemblies.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for low-voltage power distribution.
• 1250 A rated current for demanding industrial and commercial installations.
• Four-pole fixed configuration for three-phase systems requiring neutral switching.
• Advanced PR123/P-LSIG electronic trip unit for comprehensive circuit protection.
• Long-time, short-time, instantaneous and ground-fault protection functions.
• 65 kA ultimate breaking capacity at 415 V AC for high fault-level applications.
• Horizontal rear terminals support efficient integration into switchboards and power distribution assemblies.
• Fitted with four auxiliary contacts and circuit-breaker open/closed position indication.

Key Features

• ABB SACE Emax E2N series.
• 1250 A rated current.
• Four-pole construction.
• Fixed version circuit breaker.
• PR123/P-LSIG electronic overcurrent release.
• LSIG protection: long-time, short-time, instantaneous and ground-fault.
• 65 kA ultimate short-circuit breaking capacity at 415 V AC.
• 55 kA short-time withstand current.
• Horizontal rear terminal arrangement.
• Four auxiliary contacts for status and control signalling.
• Open/closed circuit-breaker position indication.

Advanced Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E2N1250 provide switching, isolation and protection for high-current low-voltage distribution circuits. They are commonly installed as incomers, feeders and distribution protection devices where dependable interruption of high prospective fault currents is essential.

The PR123/P electronic trip unit provides sophisticated protection for demanding electrical networks. Its LSIG functionality combines long-time overload protection, short-time and instantaneous short-circuit protection and ground-fault protection, helping coordinate protection across complex industrial and commercial power distribution systems.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and feeder circuit protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical systems.
• Motor control centres and power distribution assemblies.
• Transformer secondary and generator distribution circuits.
• High-current electrical switchgear installations.