1SDA056079R1 ABB E2L1250 PR123/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E2L1250 PR123/P-LSIG 1SDA056079R1 Air Circuit Breaker?

The ABB 1SDA056079R1 is a high-performance SACE Emax E2L1250 air circuit breaker moving part designed for reliable switching and protection in demanding low-voltage electrical distribution systems. This four-pole withdrawable circuit breaker has a rated uninterrupted current of 1250 A and incorporates the advanced PR123/P-LSIG R1250 electronic overcurrent release.

The PR123/P-LSIG trip unit provides comprehensive long-time, short-time, instantaneous and earth-fault protection, helping safeguard electrical installations against overloads, short circuits and earth faults. The E2L performance class provides high short-circuit interruption capability, including a rated ultimate short-circuit breaking capacity of 130 kA at 400 V AC.

With a rated operational voltage of up to 690 V AC, four-pole configuration and withdrawable W moving-part construction, the E2L1250 is particularly suitable for high-current switchboards where serviceability and operational flexibility are important. It is fitted with four auxiliary contacts and circuit-breaker open/closed position indication for integration with switchboard signalling and control systems.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker moving part for low-voltage power distribution.
• 1250 A rated uninterrupted current for high-current electrical systems.
• PR123/P-LSIG electronic release provides comprehensive overcurrent and earth-fault protection.
• LSIG functions provide long-time, short-time, instantaneous and earth-fault protection.
• 130 kA Icu/Ics at 400 V AC for demanding high-fault-level installations.
• Four-pole configuration suitable for four-pole distribution systems.
• Withdrawable moving-part design supports convenient isolation, inspection and maintenance.
• Four auxiliary contacts and open/closed position indication support control and signalling applications.

Key Features

• ABB SACE Emax E2L1250 circuit breaker moving part.
• 1250 A rated uninterrupted current.
• Four-pole configuration.
• PR123/P-LSIG R1250 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.
• 130 kA Icu/Ics at 400 V AC.
• 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.

High-Performance Protection for Low-Voltage Distribution Systems

Air circuit breakers such as the ABB SACE Emax E2L1250 provide dependable switching and protection for high-current low-voltage distribution circuits. The E2L performance class offers substantial fault-interruption capability, helping protect switchboards, conductors, transformers and connected electrical equipment in installations with demanding prospective short-circuit levels.

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 E2L1250 platform and withdrawable moving-part construction, these functions make the 1SDA056079R1 particularly suitable for main distribution and feeder applications requiring comprehensive electronic protection, high fault performance and straightforward maintenance.

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-fault-level four-pole distribution circuits.