1SDA060953R1 ABB E1N-A 1200 PR121/P-LSI 1200A 3P Withdrawable Air Circuit Breaker

Why Choose the ABB E1N-A 1200 PR121/P-LSI 1200A 3P Air Circuit Breaker?

The ABB E1N-A 1200 PR121/P-LSI, order code 1SDA060953R1, is a high-performance SACE Emax air circuit breaker moving part designed for protection and switching in high-current low-voltage power-distribution systems. Rated at 1200 A, this three-pole E1N-A breaker is equipped with ABB's PR121/P-LSI electronic overcurrent release for reliable overload and short-circuit protection.

This specific configuration is the withdrawable moving part (W MP) of the E1N-A 1200 circuit breaker system. Its PR121/P-LSI R1200 release provides long-time, short-time and instantaneous protection functions, while the E1N-A frame provides a short-circuit current rating of 50 kA at 480 V for demanding low-voltage distribution applications.

The breaker is supplied with four auxiliary contacts and open/closed position indication for integration into switchboard monitoring and control systems. Its withdrawable architecture facilitates isolation and maintenance when installed with the appropriate SACE Emax fixed cradle, making it particularly suitable for critical industrial and commercial distribution boards.

Key Advantages

• High-current 1200 A SACE Emax air circuit breaker moving part.
• PR121/P-LSI electronic overcurrent release for dependable circuit protection.
• Long-time, short-time and instantaneous LSI protection functions.
• Three-pole configuration for three-phase power-distribution systems.
• Withdrawable moving-part construction supports maintainable switchboard installations.
• 50 kA short-circuit current rating at 480 V for the E1N-A 1200 frame.
• Four auxiliary contacts and open/closed position indication support breaker-status monitoring.

Key Features

• ABB SACE Emax E1N-A 1200 circuit breaker platform.
• 1200 A rated current.
• Three poles.
• PR121/P-LSI electronic overcurrent release.
• R1200 rating plug.
• LSI protection: long-time, short-time and instantaneous functions.
• 18,000 A instantaneous protection reference for this configured release.
• 50 kA short-circuit current rating at 480 V.
• 50 kA short-time current rating for the E1N-A 1200 frame.
• Withdrawable moving part (W MP).
• Four auxiliary contacts fitted.
• Open/closed circuit-breaker position indication.
• UL configuration for low-voltage power-distribution applications.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E1N-A protect low-voltage distribution systems by detecting excessive current and interrupting the circuit before overloads or short circuits can cause serious damage to conductors, switchgear and connected equipment. The PR121/P-LSI electronic release provides long-time protection against overloads together with short-time and instantaneous short-circuit protection.

The withdrawable construction is particularly useful in critical switchboards because the circuit-breaker moving part can be isolated and removed from its compatible fixed cradle for inspection, servicing or replacement. Combined with a 1200 A rating, E1N-A performance and integrated auxiliary status contacts, the 1SDA060953R1 provides a robust solution for demanding industrial power-distribution systems.

Typical Applications

• Industrial low-voltage main distribution switchboards.
• High-current incoming and feeder protection.
• Manufacturing and process-industry electrical systems.
• Commercial and infrastructure power distribution.
• Power distribution centres and switchgear assemblies.
• Critical installations requiring maintainable withdrawable circuit breakers.