1SDA071838R1 ABB E4.2S 4000 Ekip Hi-Touch LSI 4p FHR Air Circuit Breaker

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

The ABB E4.2S 4000 Ekip Hi-Touch LSI 4p FHR, order code 1SDA071838R1, is a high-performance four-pole air circuit breaker (ACB) designed for protection, switching and isolation in demanding low-voltage power distribution systems. As part of the advanced ABB SACE Emax 2 series, it combines a substantial 4000 A rated current with sophisticated electronic protection for industrial, commercial and infrastructure installations.

This Emax 2 circuit breaker incorporates the Ekip Hi-Touch LSI solid-state trip unit, providing long-time overload, short-time selective short-circuit and instantaneous short-circuit protection. Its advanced electronic protection capabilities enable accurate configuration and coordination, helping engineers protect critical electrical networks while maintaining dependable system operation.

The E4.2S 4000 is a fixed, four-pole breaker with rear horizontal terminals. It is rated for operation at up to 690 V AC and provides an ultimate short-circuit breaking capacity of 85 kA at 400 V AC, together with a rated short-time withstand current of 66 kA for 1 s, making it suitable for high-current incoming supplies, feeders and main distribution switchboards.

Key Advantages

• High-capacity 4000 A air circuit breaker for demanding low-voltage distribution systems.
• Four-pole configuration for comprehensive switching and isolation.
• Advanced Ekip Hi-Touch LSI electronic trip unit for sophisticated circuit protection.
• Long-time, short-time selective and instantaneous protection supports effective system coordination.
• 85 kA ultimate short-circuit breaking capacity at 400 V AC.
• 66 kA short-time withstand current for 1 s supports selective power distribution designs.
• Fixed installation for permanent integration into low-voltage switchboards.
• Rear horizontal terminals facilitate connection to high-current busbar systems.

Key Features

• ABB SACE Emax 2 E4.2S air circuit breaker.
• 4000 A rated uninterrupted current.
• Four-pole configuration.
• Ekip Hi-Touch LSI solid-state trip unit.
• Long-time overload (L), short-time selective short-circuit (S) and instantaneous short-circuit (I) protection.
• Overload release current adjustment from 1600–4000 A.
• Short-time delayed short-circuit release adjustment from 2400–40000 A.
• Instantaneous short-circuit release adjustment from 6000–60000 A.
• 690 V AC rated voltage.
• 85 kA ultimate short-circuit breaking capacity at 400 V AC.
• 66 kA rated short-time withstand current for 1 s.
• Fixed construction with rear horizontal terminals.
• Supplied with four auxiliary change-over contacts and circuit-breaker open/closed position indication.

Advanced Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 E4.2S provide protection, switching and isolation for high-current low-voltage electrical networks. By detecting overload and short-circuit conditions, the breaker can disconnect the affected circuit to help protect cables, switchgear and connected equipment while supporting continuity throughout the wider distribution system.

The Ekip Hi-Touch LSI trip unit combines long-time, short-time and instantaneous protection with advanced electronic functionality for demanding power distribution applications. Combined with the E4.2S frame's 4000 A current rating and high short-circuit performance, this makes the 1SDA071838R1 particularly suitable for critical main distribution and high-current feeder applications.

Typical Applications

• Industrial low-voltage main distribution switchboards.
• Manufacturing plants and production facilities.
• Commercial building electrical distribution systems.
• Data centres and critical power infrastructure.
• Utilities and infrastructure installations.
• Generator and transformer distribution systems.
• High-current incoming supply protection.
• Main and feeder circuits requiring selective short-circuit protection.