1SDA055967R1 ABB E2S 1250 PR123/P-LSIG 1250 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S 1250 PR123/P-LSIG 1SDA055967R1 Air Circuit Breaker?

The ABB 1SDA055967R1 is a high-performance SACE Emax E2S 1250 air circuit breaker (ACB) designed for reliable switching, isolation and protection in demanding low-voltage electrical distribution systems. Part of the advanced ABB SACE Emax E2 series, this four-pole fixed circuit breaker is equipped with a PR123/P-LSIG electronic overcurrent release for comprehensive electrical protection.

With a rated current of 1250 A, the E2S 1250 is well suited to main distribution boards, industrial switchgear, transformer protection and other high-current installations. The PR123/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, delivering comprehensive LSIG protection for critical electrical systems.

The E2S performance level provides high short-circuit interruption capability, including a rated ultimate short-circuit breaking capacity of 85 kA at 400–415 V AC. This version is supplied as a four-pole fixed circuit breaker with rear horizontal terminals and features four auxiliary contacts plus open/closed position indication for integration into low-voltage switchgear and monitoring systems.

Key Advantages

• Heavy-duty 1250 A air circuit breaker for low-voltage power distribution.
• Four-pole configuration suitable for systems requiring phase and neutral switching.
• 85 kA ultimate short-circuit breaking capacity at 400–415 V AC.
• Advanced PR123/P-LSIG electronic overcurrent release.
• Comprehensive LSIG protection against overload, short-time, instantaneous and earth-fault conditions.
• Fixed construction with rear horizontal terminals for permanent switchboard installation.
• Part of the proven ABB SACE Emax E2S air circuit breaker platform.

Key Features

• ABB SACE Emax E2S 1250 series.
• 1250 A rated current.
• Four-pole configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR123/P-LSIG R1250 electronic trip unit.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Integrated earth-fault protection.
• 85 kA Icu at 400–415 V AC.
• Four auxiliary contacts and open/closed position indication.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E2S provide switching, isolation and fault protection for high-current low-voltage distribution circuits. The E2S 1250 combines a substantial continuous-current rating with high short-circuit breaking performance, making it particularly suitable for main switchboards and industrial distribution systems where dependable interruption of significant fault currents is essential.

The PR123/P-LSIG electronic trip unit provides comprehensive protection against long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault conditions. Combined with the four-pole fixed Emax construction and rear horizontal terminals, the 1SDA055967R1 provides a robust solution for installations requiring advanced electronic protection and reliable phase and neutral switching.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Transformer protection and distribution.
• Generator and utility distribution systems.
• Manufacturing and process plant switchgear.
• Commercial building electrical infrastructure.
• Four-pole distribution systems requiring neutral switching.