1SDA072555R1 ABB E4.2S 4000 Ekip Touch LSI 3-Pole Air Circuit Breaker

Why Choose the ABB 1SDA072555R1 E4.2S 4000 Ekip Touch LSI Air Circuit Breaker?

The ABB 1SDA072555R1 is a high-performance SACE Emax 2 E4.2S 4000 air circuit breaker moving part designed for protection and switching in demanding low-voltage electrical distribution systems. This three-pole configuration combines a 4000 A rated uninterrupted current with an advanced Ekip Touch LSI electronic trip unit, providing long-time, short-time and instantaneous protection.

As part of the ABB SACE Emax 2 range, the E4.2S combines high-current switching capability with electronic protection and a touchscreen-based Ekip interface. The Ekip Touch LSI release provides adjustable overload and short-circuit protection for applications requiring effective coordination and dependable protection of transformers, feeders and electrical installations.

This model is a 3-pole withdrawable moving part (WMP) rated at 4000 A and 690 V AC. The E4.2S performance level provides a rated ultimate short-circuit breaking capacity of 85 kA at 400–440 V AC and 66 kA at 500–690 V AC, together with a rated short-time withstand current of 66 kA for 1 s.

Key Advantages

• High-performance ABB SACE Emax 2 air circuit breaker for demanding low-voltage power distribution.
• 4000 A rated uninterrupted current for high-current industrial and infrastructure applications.
• Ekip Touch LSI electronic trip unit with touchscreen-based configuration and monitoring.
• LSI functionality provides long-time, short-time and instantaneous protection.
• 85 kA Icu at 400–440 V AC for high-fault-level distribution systems.
• 66 kA Icu at 500–690 V AC for higher-voltage low-voltage networks.
• 66 kA short-time withstand current for 1 s supports protection coordination and selectivity.
• Withdrawable moving-part design supports efficient switchboard servicing and maintenance.

Key Features

• ABB SACE Emax 2 E4.2S frame.
• 4000 A rated uninterrupted current.
• 3-pole configuration.
• Ekip Touch LSI solid-state electronic release.
• Long-time L overload protection.
• Short-time S delayed short-circuit protection.
• Instantaneous I short-circuit protection.
• 690 V AC rated operational voltage.
• 85 kA Icu at 400–440 V AC.
• 66 kA Icu at 500–690 V AC.
• 66 kA Icw for 1 s and 3 s.
• 4 auxiliary change-over contacts.
• Circuit-breaker open/closed position indication.
• Withdrawable moving part (WMP) configuration.

Advanced LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 E4.2S provide switching and protection for high-current low-voltage distribution circuits. The Ekip Touch electronic trip unit monitors circuit conditions and initiates interruption when configured protection thresholds are exceeded, helping protect switchgear, conductors and connected equipment against overload and short-circuit currents.

The Ekip Touch LSI release combines adjustable long-time overload protection with short-time delayed and instantaneous short-circuit protection. Together with the E4.2S frame and withdrawable architecture, the 1SDA072555R1 provides a capable solution for installations where high-current protection, selective coordination, accessible electronic configuration and maintainability are important.

Typical Applications

• Main incoming protection in high-current low-voltage switchboards.
• Industrial power distribution systems.
• Transformer protection and secondary distribution.
• High-current feeder protection.
• Commercial and infrastructure electrical distribution.
• Power generation and utility distribution systems.
• Power distribution centres and critical electrical installations.