1SDA055983R1 ABB E2S 1250 PR123/P-LSIG 1250 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E2S 1250 PR123/P-LSIG 1SDA055983R1 Air Circuit Breaker?

The ABB 1SDA055983R1 is a high-performance SACE Emax E2S 1250 air circuit breaker (ACB) moving part designed for dependable switching and comprehensive protection in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax E2 series, this four-pole withdrawable circuit breaker is equipped with the advanced PR123/P-LSIG electronic overcurrent release.

With a rated uninterrupted current of 1250 A and a rated operational voltage of up to 690 V AC, the E2S 1250 is suitable for main distribution boards, industrial switchgear, transformer protection and other high-current applications. The PR123/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection for comprehensive LSIG circuit protection.

The E2S performance level provides a rated ultimate short-circuit breaking capacity of 85 kA at 400–415 V AC and 65 kA at 500–690 V AC. This version is supplied as a four-pole withdrawable moving part (W MP) and is fitted with four auxiliary contacts plus open/closed circuit-breaker position indication, supporting convenient servicing and integration into compatible SACE Emax switchgear.

Key Advantages

• Heavy-duty 1250 A air circuit breaker moving part 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.
• Withdrawable moving-part design supports convenient inspection, servicing and replacement.
• Part of the proven ABB SACE Emax E2S air circuit breaker platform.

Key Features

• ABB SACE Emax E2S 1250 series.
• 1250 A rated uninterrupted current.
• Four-pole configuration.
• Withdrawable moving-part execution.
• 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.
• 65 kA Icw for 1 s.
• 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 substantial continuous-current capability 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 withdrawable SACE Emax construction, the 1SDA055983R1 provides advanced electronic protection while allowing the moving part to be withdrawn from its compatible fixed portion for inspection, servicing or replacement.

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 and infrastructure power distribution.
• Four-pole installations requiring withdrawable circuit-breaker construction.