1SDA071783R1 ABB E4.2S 3200 Ekip Dip LSIG 4p FHR Air Circuit Breaker

Why Choose the ABB E4.2S 3200 Ekip Dip LSIG 4p FHR Air Circuit Breaker?

The ABB 1SDA071783R1 is a high-performance Emax 2 air circuit breaker (ACB) designed for protection, switching and isolation in demanding low-voltage electrical distribution systems. Identified as the E4.2S 3200 Ekip Dip LSIG 4p FHR, this four-pole fixed circuit breaker combines a 3200 A rated current with ABB’s Ekip Dip LSIG solid-state electronic trip unit for comprehensive circuit protection.

As part of the ABB SACE Emax 2 series, the E4.2S combines high short-circuit performance with adjustable electronic protection. The Ekip Dip LSIG release provides long-time overload, short-time delayed short-circuit, instantaneous short-circuit and earth-fault protection, allowing coordinated protection of cables, busbars, transformers and other equipment within industrial and commercial power-distribution systems.

With a rated operational voltage of up to 690 V AC and an ultimate short-circuit breaking capacity of 85 kA at 400–440 V AC, the 1SDA071783R1 is suitable for high-current installations where dependable fault interruption and selectivity are essential. Its four-pole fixed construction and rear flat horizontal terminals provide a robust configuration for integration into low-voltage switchboards and distribution assemblies.

Key Advantages

• High-performance ABB Emax 2 air circuit breaker for low-voltage power distribution.
• 3200 A rated current for demanding high-current installations.
• 85 kA Icu at 400–440 V AC for reliable short-circuit interruption.
• Four-pole configuration for switching and protection of three phases and neutral.
• Advanced Ekip Dip LSIG electronic trip unit with integrated earth-fault protection.
• 66 kA short-time withstand current for 1 s and 3 s supports selective protection strategies.
• Fixed construction with rear flat horizontal terminals for switchboard installation.

Key Features

• ABB SACE Emax 2 E4.2S series.
• 3200 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 Dip LSIG solid-state electronic protection release.
• Long-time, short-time, instantaneous and earth-fault protection functions.
• 4-pole fixed circuit breaker configuration.
• Rear flat horizontal main terminals.
• Four auxiliary change-over contacts with circuit-breaker open/closed position indication.

Comprehensive 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 performance level combines a 3200 A current rating with substantial short-circuit interruption capability, making it suitable for main distribution and other critical positions within industrial and infrastructure switchboards.

The Ekip Dip LSIG electronic trip unit provides long-time overload, short-time delayed short-circuit, instantaneous short-circuit and earth-fault protection. Its adjustable protection settings allow the breaker to be coordinated with other protective devices, helping improve selectivity and continuity of service while protecting electrical equipment against damaging overcurrents and earth 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.
• High-current installations requiring earth-fault protection.