1SDA072542R1 ABB E4.2N 4000 Ekip Dip LSI 3P WMP Air Circuit Breaker

Why Choose the ABB 1SDA072542R1 E4.2N 4000 Ekip Dip LSI Air Circuit Breaker?

The ABB 1SDA072542R1 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 LSI 3p WMP, it combines a 4000 A rated current, three-pole construction and ABB's Ekip Dip solid-state electronic release with LSI protection functions.

As part of the ABB SACE Emax 2 air circuit breaker series, the E4.2N platform provides robust switching and fault protection for high-current industrial, commercial and infrastructure distribution systems. The N performance level delivers an ultimate short-circuit breaking capacity of 66 kA at 440 V AC together with a rated short-time withstand current of 66 kA for 1 s.

The Ekip Dip LSI electronic release provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. Compared with an LI release, the additional short-time protection function provides greater flexibility for selective coordination between upstream and downstream protective devices. The three-pole withdrawable moving-part (WMP) construction is designed for use with the appropriate Emax 2 fixed part.

Key Advantages

• High-current ABB SACE Emax 2 E4.2N air circuit breaker moving part.
• 4000 A rated current for demanding low-voltage power distribution.
• Ekip Dip LSI electronic release provides three-stage electronic circuit protection.
• Long-time, short-time and instantaneous functions support selective system coordination.
• 66 kA ultimate short-circuit breaking capacity at 440 V AC.
• 66 kA short-time withstand current for 1 s.
• Three-pole withdrawable construction supports efficient isolation, servicing and maintenance.
• Four auxiliary contacts provide circuit-breaker status signalling for control and monitoring systems.

Key Features

• ABB SACE Emax 2 E4.2 frame.
• N short-circuit performance level.
• 4000 A rated current.
• Three-pole construction.
• Ekip Dip LSI solid-state electronic release.
• Long-time (L) overload protection.
• Short-time (S) delayed short-circuit protection.
• Instantaneous (I) short-circuit protection.
• 66 kA Icu at 440 V AC.
• 66 kA Icw for 1 s.
• Withdrawable moving-part (WMP) execution.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Reliable Selective Protection for High-Current Distribution

Air circuit breakers such as the ABB Emax 2 E4.2N protect high-current low-voltage networks against damaging overload and short-circuit conditions. With a 4000 A current rating, 66 kA ultimate breaking capacity at 440 V AC and 66 kA short-time withstand capability for 1 s, this E4.2N configuration is well suited to major distribution points in demanding electrical installations.

The Ekip Dip LSI release provides greater protection flexibility than a basic LI configuration. Long-time protection responds to sustained overloads, short-time protection allows a controlled delay for selective coordination with downstream protective devices, and instantaneous protection rapidly interrupts severe short circuits. This combination helps improve fault discrimination while maintaining robust protection of conductors and switchgear.

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 selective LSI protection.