1SDA071848R1 ABB E4.2H 4000 Ekip Hi-Touch LSI 4p FHR Air Circuit Breaker

Why Choose the ABB E4.2H 4000 Ekip Hi-Touch LSI 4p FHR Air Circuit Breaker?

The ABB 1SDA071848R1 is a high-performance Emax 2 air circuit breaker (ACB) designed for advanced protection, switching, measurement and control in demanding low-voltage electrical distribution systems. Identified as the E4.2H 4000 Ekip Hi-Touch LSI 4p FHR, this four-pole fixed circuit breaker combines a 4000 A rated current with ABB’s advanced Ekip Hi-Touch LSI solid-state electronic trip unit.

As part of the ABB SACE Emax 2 series, the E4.2H provides high short-circuit performance together with sophisticated electronic protection and power-management capabilities. The Ekip Hi-Touch LSI release provides long-time overload, short-time selective short-circuit and instantaneous short-circuit protection, making the breaker suitable for critical installations where protection selectivity and detailed electrical monitoring are important.

With a rated operational voltage of 690 V AC, an ultimate short-circuit breaking capacity of 100 kA at 400–440 V AC and 85 kA at 500–690 V AC, the 1SDA071848R1 is engineered for high-current installations with substantial prospective fault levels. Its four-pole fixed construction and rear flat horizontal terminals provide a robust configuration for permanent integration into industrial and infrastructure switchboards.

Key Advantages

• High-performance ABB Emax 2 air circuit breaker for demanding low-voltage power distribution.
• 4000 A rated current for large industrial and infrastructure installations.
• 100 kA Icu at 400–440 V AC for installations with high prospective fault currents.
• 85 kA Icu at 500–690 V AC for strong fault-interruption performance at higher system voltages.
• Four-pole configuration for switching and protection of three phases and neutral.
• Advanced Ekip Hi-Touch LSI electronic trip unit for configurable overload and short-circuit protection.
• 85 kA short-time withstand current for 1 s supports selective protection strategies.
• Fixed construction with rear flat horizontal terminals for switchboard integration.

Key Features

• ABB SACE Emax 2 E4.2H series.
• 4000 A rated uninterrupted current.
• 690 V AC rated operational voltage.
• 100 kA Icu at 400–440 V AC.
• 85 kA Icu at 500–690 V AC.
• 85 kA rated short-time withstand current for 1 s.
• Ekip Hi-Touch LSI solid-state electronic protection release.
• Long-time overload, short-time selective and instantaneous short-circuit protection functions.
• Advanced measurement and power-management capabilities within the Ekip Hi-Touch platform.
• 4-pole fixed circuit breaker configuration.
• Rear flat horizontal main terminals.
• Four auxiliary contacts with circuit-breaker open/closed position indication.
• Designed for integration with automation and energy-management systems.

Advanced High-Current Protection and Power Management

Air circuit breakers such as the ABB Emax 2 E4.2H provide switching, isolation and protection for high-current low-voltage electrical systems. The E4.2H 4000 combines a substantial 4000 A current rating with an ultimate breaking capacity of up to 100 kA, making it suitable for main distribution positions and other critical points where high prospective short-circuit currents can occur.

The Ekip Hi-Touch LSI electronic trip unit provides configurable long-time overload, short-time selective and instantaneous short-circuit protection while supporting the advanced measurement and power-management capabilities of the Emax 2 platform. This combination helps protect transformers, busbars, cables and connected equipment while supporting selectivity, continuity of service and integration with modern electrical automation systems.

Typical Applications

• Main incomer protection in low-voltage switchboards.
• Industrial power distribution systems.
• Transformer and installation protection.
• Manufacturing and process plants.
• Data centres and critical power installations.
• Commercial and infrastructure electrical distribution.
• Automation and energy-management systems.
• High-current installations with high prospective short-circuit levels.