1SDA055713R1 ABB E1N 800 PR121/P-LSI 800A 3P Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E1N 800 PR121/P-LSI 800A 3P Withdrawable Air Circuit Breaker Moving Part?

The ABB E1N 800 PR121/P-LSI, order code 1SDA055713R1, is a high-performance three-pole withdrawable air circuit breaker moving part designed for protection and switching in low-voltage electrical distribution systems. As part of the ABB SACE Emax E1 series, it combines an 800 A rated current with the electronic PR121/P-LSI protection release for comprehensive overload and short-circuit protection.

This E1N configuration is the withdrawable moving part (W MP) of the circuit breaker and is designed for use with the corresponding Emax withdrawable fixed part. The draw-out architecture supports convenient inspection, maintenance and replacement while allowing the breaker moving portion to be disconnected from the main circuit within a suitably configured low-voltage switchboard.

With a 690 V AC rated operational voltage and E1N performance level providing 50 kA short-circuit breaking capacity at 415 V AC, the E1N 800 is engineered for demanding industrial and commercial power distribution. The PR121/P-LSI electronic release provides long-time, short-time and instantaneous protection functions, while the moving part is equipped with auxiliary contacts for open and closed breaker status indication.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker moving part for low-voltage power distribution.
• 800 A rated current for high-current electrical installations.
• Three-pole configuration designed for three-phase distribution systems.
• PR121/P-LSI electronic protection release provides long-time, short-time and instantaneous protection.
• 50 kA ultimate short-circuit breaking capacity at 415 V AC.
• Withdrawable moving-part construction facilitates servicing and maintenance of switchgear.
• Equipped with four auxiliary contacts for open/closed breaker position indication.

Key Features

• ABB SACE Emax E1N series.
• 800 A rated uninterrupted current.
• 3-pole air circuit breaker moving part.
• PR121/P-LSI electronic trip unit.
• Long-time (L), short-time (S) and instantaneous (I) protection functions.
• 690 V AC rated operational voltage.
• 50 kA rated ultimate short-circuit breaking capacity at 415 V AC.
• 50 kA rated service short-circuit breaking capacity at 415 V AC.
• Withdrawable / draw-out moving-part construction.
• Four auxiliary contacts with open/closed position indication.

Reliable Protection for Low-Voltage Distribution Systems

Air circuit breakers such as the ABB E1N 800 provide switching and automatic protection for high-current low-voltage circuits. The electronic protection release continuously monitors current conditions and commands the breaker to interrupt the circuit when configured protection thresholds are exceeded, helping protect cables, switchgear and connected equipment against damaging overload and short-circuit currents.

The PR121/P-LSI release combines long-time overload protection with selective short-time and instantaneous short-circuit protection. This combination enables effective coordination within electrical distribution networks, while the withdrawable Emax architecture provides a practical solution for switchboards where maintainability, isolation and continuity of service are important considerations.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and feeder circuit protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Generator and transformer distribution systems.
• Withdrawable switchgear requiring serviceable breaker assemblies.