1SDA055784R1 ABB E1N1600 PR121/P-LI 1600 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA055784R1 E1N1600 Air Circuit Breaker Moving Part?

The ABB 1SDA055784R1 is a high-performance SACE Emax E1N1600 air circuit breaker (ACB) moving part designed for reliable switching and protection in high-current low-voltage electrical distribution systems. As part of the ABB New Emax series, this four-pole withdrawable breaker moving part combines a rated uninterrupted current of 1600 A with the PR121/P-LI R1600 electronic overcurrent release.

The PR121/P-LI trip unit provides long-time (L) overload and instantaneous (I) short-circuit protection, helping protect electrical installations, conductors and connected equipment against damaging overcurrent conditions. Adjustable electronic protection settings support effective coordination across industrial and commercial power distribution networks.

The 1SDA055784R1 is configured as a four-pole withdrawable moving part with a rated operational voltage of 690 V AC and a rated ultimate short-circuit breaking capacity of 50 kA. Its withdrawable construction supports convenient isolation and servicing, while four auxiliary changeover contacts and open/closed position indication facilitate integration with switchboard monitoring and control systems.

Key Advantages

• Genuine ABB SACE Emax E1N1600 withdrawable circuit breaker moving part.
• 1600 A rated uninterrupted current for high-current power distribution.
• Four-pole configuration for switching and protection of four conductors.
• PR121/P-LI R1600 electronic overcurrent release.
• Provides long-time overload and instantaneous short-circuit protection.
• 50 kA ultimate short-circuit breaking capacity at operating voltages up to 690 V AC.
• Withdrawable construction simplifies isolation, inspection, servicing and replacement.

Key Features

• ABB SACE New Emax E1N1600 series.
• 1600 A rated uninterrupted current.
• Four-pole withdrawable configuration.
• PR121/P-LI R1600 electronic trip unit.
• Long-time overload protection.
• Instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 50 kA rated ultimate short-circuit breaking capacity (Icu).
• 50 kA rated service short-circuit breaking capacity (Ics).
• 50 kA short-time withstand current for 1 s.
• Four auxiliary changeover contacts.
• Open/closed circuit-breaker position indication.
• Optional motor operating mechanism capability.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E1N1600 provide switching, isolation and overcurrent protection for high-current low-voltage distribution circuits. The electronic protection release monitors electrical conditions and initiates circuit-breaker operation when configured overload or instantaneous short-circuit thresholds are exceeded.

The PR121/P-LI release combines adjustable long-time and instantaneous protection with the robust switching performance of the Emax platform. The withdrawable design allows the breaker moving part to be isolated and removed from its compatible fixed part, supporting efficient inspection, maintenance and replacement within critical electrical distribution systems.

Typical Applications

• Industrial low-voltage switchboards and distribution systems.
• Withdrawable power distribution assemblies.
• Main incoming and feeder circuit protection.
• Manufacturing and process industry electrical systems.
• Commercial building power distribution.
• Infrastructure and utility electrical installations.