1SDA071836R1 ABB E4.2S 4000 Ekip Touch LSIG 4p FHR Air Circuit Breaker

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

The ABB 1SDA071836R1 is a high-current Emax 2 air circuit breaker (ACB) designed for protection, switching and control in demanding low-voltage electrical distribution systems. Identified as the E4.2S 4000 Ekip Touch LSIG 4p FHR, this four-pole fixed circuit breaker combines a 4000 A rated current with ABB’s advanced Ekip Touch LSIG electronic trip unit.

As part of the ABB SACE Emax 2 series, the E4.2S provides high short-circuit performance together with configurable electronic protection and monitoring. The Ekip Touch LSIG release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, enabling comprehensive protection and coordination across industrial and commercial power-distribution systems.

With a rated operational voltage of up to 690 V AC, an ultimate short-circuit breaking capacity of 85 kA at 400–440 V AC and 66 kA at 500–690 V AC, the 1SDA071836R1 is suitable for high-current installations requiring dependable fault interruption. Its four-pole fixed construction and rear flat horizontal terminals provide a robust configuration for permanent integration into low-voltage switchboards and distribution assemblies.

Key Advantages

• High-current ABB Emax 2 air circuit breaker for demanding low-voltage power distribution.
• 4000 A rated current for large industrial and infrastructure installations.
• 85 kA Icu at 400–440 V AC for high fault-level applications.
• Four-pole configuration for switching and protection of three phases and neutral.
• Advanced Ekip Touch LSIG electronic trip unit with overload, short-circuit and earth-fault protection.
• 66 kA short-time withstand current supports selective protection strategies.
• Fixed construction with rear flat horizontal terminals for switchboard integration.

Key Features

• ABB SACE Emax 2 E4.2S series.
• 4000 A rated uninterrupted current.
• 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.
• 66 kA rated short-time withstand current.
• Ekip Touch LSIG electronic protection release.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• Touch interface for protection settings and operating information.
• 4-pole fixed circuit breaker configuration.
• Rear flat horizontal main terminals.
• Designed in accordance with IEC 60947-2 requirements.

Advanced High-Current Circuit Protection

Air circuit breakers such as the ABB Emax 2 E4.2S provide switching, isolation and protection for high-current low-voltage electrical systems. The E4.2S 4000 combines a substantial 4000 A current rating with high short-circuit interruption capability, making it suitable for main distribution positions and other critical points within industrial and infrastructure switchboards.

The Ekip Touch LSIG electronic trip unit provides adjustable protection against long-time overloads, short-time and instantaneous short circuits and earth faults. These protection functions support coordinated and selective distribution-system design while helping protect cables, busbars, transformers and connected equipment against damaging electrical faults.

Typical Applications

• Main incomer protection in low-voltage switchboards.
• Industrial power distribution systems.
• Transformer and installation protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical distribution.
• Data centres and critical power installations.
• Large electrical distribution panels and switchboards.
• High-current installations requiring integrated earth-fault protection.