1SDA072554R1 ABB E4.2S 4000 Ekip Touch LI 3P WMP Air Circuit Breaker

Why Choose the ABB 1SDA072554R1 E4.2S 4000 Ekip Touch LI Air Circuit Breaker?

The ABB 1SDA072554R1 is a high-current SACE Emax 2 E4.2S 4000 air circuit breaker moving part designed for protection and control of demanding low-voltage AC power distribution systems. Configured as an E4.2S 4000 Ekip Touch LI 3p WMP, it combines a 4000 A rated uninterrupted current, three-pole construction and ABB's Ekip Touch electronic trip unit with LI protection functions.

As part of the ABB SACE Emax 2 air circuit breaker series, the E4.2S platform provides robust switching and short-circuit protection for high-current industrial, commercial and infrastructure distribution systems. This S performance configuration provides an ultimate short-circuit breaking capacity of 85 kA at 400–440 V AC and 66 kA at 500–690 V AC, with rated service breaking capacity equal to 100% of Icu.

The Ekip Touch LI electronic trip unit provides long-time overload and instantaneous short-circuit protection, combining dependable circuit protection with ABB's touch-interface trip-unit platform. Its three-pole withdrawable moving-part (WMP) configuration connects to the appropriate separate Emax 2 fixed chassis, supporting isolation, inspection and maintenance in compatible switchboards.

Key Advantages

• High-current ABB SACE Emax 2 E4.2S air circuit breaker moving part.
• 4000 A rated uninterrupted current for demanding low-voltage distribution.
• Ekip Touch LI electronic trip unit provides overload and instantaneous short-circuit protection.
• 85 kA ultimate breaking capacity at 400–440 V AC.
• 66 kA ultimate breaking capacity at 500–690 V AC.
• Ics equal to 100% of Icu across the specified operating-voltage range.
• 66 kA short-time withstand current for 1 s and 3 s.
• Three-pole withdrawable construction supports efficient isolation, servicing and switchboard maintenance.

Key Features

• ABB SACE Emax 2 E4.2 frame.
• S short-circuit performance level.
• 4000 A rated current.
• Three-pole construction.
• Ekip Touch LI electronic trip unit.
• 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.
• 85 kA Icu at 400–440 V AC.
• 66 kA Icu at 500–690 V AC.
• Withdrawable moving-part (WMP) execution.
• Four auxiliary changeover contacts and switched-off indication.
• Optional motor drive for electrically operated applications.

Advanced LI Protection for High-Current Distribution

Air circuit breakers such as the ABB Emax 2 E4.2S protect high-current low-voltage networks against potentially damaging overload and short-circuit conditions. With a 4000 A rated uninterrupted current, up to 85 kA ultimate breaking capacity and 66 kA short-time withstand capability, this E4.2S configuration is well suited to major distribution points in demanding electrical installations.

The Ekip Touch LI trip unit provides two fundamental 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 Emax 2 withdrawable architecture, the 1SDA072554R1 provides dependable high-current protection while supporting practical switchboard maintenance and servicing.

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.