1SDA072541R1 ABB E4.2N 4000 Ekip Dip LI 3P WMP Air Circuit Breaker

Why Choose the ABB 1SDA072541R1 E4.2N 4000 Ekip Dip LI Air Circuit Breaker?

The ABB 1SDA072541R1 is a high-current SACE Emax 2 E4.2N 4000 air circuit breaker moving part designed for protection and control of demanding low-voltage AC power distribution systems. Configured as an E4.2N 4000 Ekip Dip LI 3p WMP, it combines a 4000 A rated uninterrupted current, three-pole construction and ABB's Ekip Dip solid-state electronic release with LI protection functions.

As part of the ABB SACE Emax 2 air circuit breaker series, the E4.2N platform provides robust switching and short-circuit protection for high-current industrial, commercial and infrastructure distribution systems. The N performance level provides a rated ultimate short-circuit breaking capacity of 66 kA across key AC system voltages up to 690 V AC, with the rated service short-circuit breaking capacity equal to 100% of Icu.

The Ekip Dip LI electronic release provides long-time overload and instantaneous short-circuit protection, delivering straightforward electronic protection for high-current feeders and main distribution circuits. Its three-pole withdrawable moving-part (WMP) configuration is designed for use with the appropriate Emax 2 fixed part, supporting isolation, inspection and maintenance in compatible switchboards.

Key Advantages

• High-current ABB SACE Emax 2 E4.2N air circuit breaker moving part.
• 4000 A rated uninterrupted current for demanding low-voltage power distribution.
• Ekip Dip LI electronic release provides overload and instantaneous short-circuit protection.
• 66 kA ultimate short-circuit breaking capacity at AC voltages up to 690 V.
• Ics equal to 100% of Icu for strong service short-circuit performance.
• 66 kA short-time withstand current for 1 s supports robust high-current distribution designs.
• Three-pole withdrawable construction supports convenient servicing and switchboard maintenance.
• Well suited to main incomers, transformer secondaries and high-current distribution feeders.

Key Features

• ABB SACE Emax 2 E4.2 frame.
• N short-circuit performance level.
• 4000 A rated current.
• Three-pole construction.
• Ekip Dip LI solid-state electronic release.
• Long-time (L) overload protection.
• Instantaneous (I) short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 66 kA Icu at 400–690 V AC.
• 66 kA Icw for 1 s.
• Withdrawable moving-part (WMP) execution.

Reliable High-Current Protection for Low-Voltage Distribution

Air circuit breakers such as the ABB Emax 2 E4.2N protect high-current low-voltage networks against potentially damaging overload and short-circuit conditions. With a 4000 A rated uninterrupted current and 66 kA short-circuit breaking capability, this E4.2N configuration is suitable for major distribution points where dependable switching and protection are essential.

The Ekip Dip LI release provides two fundamental electronic protection functions. Long-time protection responds to sustained overload conditions, while instantaneous protection rapidly trips the breaker when severe short-circuit currents occur. Combined with the withdrawable Emax 2 architecture, the 1SDA072541R1 provides a practical solution for high-current systems requiring dependable protection and maintainability.

Typical Applications

• Main incoming protection in high-current low-voltage switchboards.
• Industrial power distribution systems.
• Transformer secondary protection.
• High-current distribution feeder protection.
• Large commercial building electrical distribution.
• Manufacturing and process-industry switchgear.
• Infrastructure and utility electrical installations.
• Withdrawable switchboards requiring high-current LI protection.