1SDA056143R1 ABB E3N2500 PR123/P-LSIG 2500 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3N2500 PR123/P-LSIG 1SDA056143R1 Air Circuit Breaker?

The ABB 1SDA056143R1 is a high-current SACE Emax E3N2500 air circuit breaker moving part designed for switching and protection in demanding low-voltage electrical distribution systems. Part of the ABB New Emax range, this four-pole withdrawable circuit breaker is rated at 2500 A and incorporates the advanced PR123/P-LSIG R2500 electronic overcurrent release.

The PR123/P-LSIG trip unit provides comprehensive long-time, short-time, instantaneous and earth-fault protection. These LSIG functions help protect electrical installations against sustained overloads, short-circuit faults and earth faults, making the E3N2500 suitable for major distribution circuits where coordinated electronic protection is required.

With a rated operational voltage of up to 690 V AC, four-pole configuration and withdrawable moving-part construction, the E3N2500 is particularly suitable for high-current switchboards where serviceability and operational flexibility are important. It provides 65 kA rated ultimate and service short-circuit breaking capacity across the specified 220–690 V AC range and is fitted with four auxiliary contacts plus circuit-breaker open/closed position indication.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker moving part for high-current low-voltage distribution.
• 2500 A rated uninterrupted current for demanding electrical installations.
• PR123/P-LSIG R2500 electronic release provides comprehensive overcurrent and earth-fault protection.
• LSIG functionality provides long-time, short-time, instantaneous and earth-fault protection.
• 65 kA Icu and Ics across the specified 220–690 V AC range.
• 65 kA short-time withstand current for 1 s and 3 s.
• Four-pole withdrawable configuration supports serviceable high-current distribution systems.
• Four auxiliary contacts and open/closed position indication support switchboard control and signalling.

Key Features

• ABB SACE Emax E3N2500 circuit breaker moving part.
• 2500 A rated uninterrupted current.
• Four-pole configuration.
• PR123/P-LSIG R2500 electronic overcurrent release.
• L protection: long-time overload protection.
• S protection: short-time short-circuit protection.
• I protection: instantaneous short-circuit protection.
• G protection: earth-fault protection.
• 65 kA Icu/Ics at 220–690 V AC.
• 65 kA Icw for 1 s and 3 s.
• 1000 V rated insulation voltage and 12 kV impulse withstand voltage.
• Withdrawable W version for use with a compatible ABB SACE Emax fixed part.
• Fitted with four auxiliary contacts and circuit-breaker open/closed position indication.

Advanced Protection for Low-Voltage Distribution Systems

The ABB SACE Emax E3N2500 is engineered for high-current low-voltage distribution duties where dependable switching and substantial fault-current capability are required. Its 2500 A current rating, 65 kA short-circuit breaking capacity and 65 kA short-time withstand capability make it suitable for protecting major distribution circuits, transformer-fed systems and demanding industrial switchboards.

The PR123/P-LSIG electronic release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Together with the four-pole E3N platform and withdrawable moving-part construction, these functions make the 1SDA056143R1 well suited to main distribution and feeder applications requiring comprehensive electronic protection, high fault-current performance and maintainable switchgear construction.

Typical Applications

• Industrial low-voltage switchboards.
• Main electrical distribution panels.
• Incoming mains protection.
• High-current feeder protection.
• Manufacturing and process industry electrical systems.
• Commercial and infrastructure power distribution.
• Transformer and installation protection.
• High-current and high-fault-level four-pole distribution circuits.