1SDA071221R1 ABB E4.2V 4000 Ekip Dip LI 3p FHR Air Circuit Breaker

Why Choose the ABB E4.2V 4000 Ekip Dip LI 3p FHR Air Circuit Breaker?

The ABB E4.2V 4000 Ekip Dip LI 3p FHR, order code 1SDA071221R1, is a high-performance SACE Emax 2 air circuit breaker (ACB) designed for protection, switching and isolation in demanding low-voltage power distribution systems. Rated at 4000 A, this three-pole fixed circuit breaker combines ABB's E4.2V high-breaking-capacity frame with an Ekip Dip LI electronic trip unit.

The Ekip Dip LI release provides long-time overload (L) and instantaneous short-circuit (I) protection, providing dependable electronic protection for high-current feeders and main distribution circuits. The LI configuration is particularly suitable where straightforward overload and instantaneous fault protection is required without short-time or integrated earth-fault protection functions.

This configuration is a fixed three-pole breaker with rear horizontal (HR) terminals. ABB identifies the E4.2V 4000 configuration with a 150 kA breaking-performance rating and 100 kA short-time withstand rating, providing substantial fault-handling capability for high-current industrial and critical power installations.

Key Advantages

• High-capacity 4000 A SACE Emax 2 air circuit breaker for major low-voltage distribution circuits.
• Ekip Dip LI electronic trip unit provides dependable overload and instantaneous short-circuit protection.
• High-performance E4.2V frame for installations with substantial prospective fault currents.
• 150 kA breaking-performance rating for demanding low-voltage applications.
• 100 kA short-time withstand rating supports robust high-current distribution architectures.
• LI protection provides long-time overload and instantaneous short-circuit protection without unnecessary additional functions.
• Three-pole fixed configuration for permanent switchboard installation.
• Rear horizontal terminals support integration with switchboard busbars and power conductors.

Key Features

• ABB SACE Emax 2 E4.2V frame.
• 4000 A rated current.
• Three-pole configuration.
• Fixed mounting version.
• Ekip Dip LI electronic release.
• Long-time overload (L) and instantaneous short-circuit (I) protection.
• 150 kA breaking-performance rating.
• 100 kA short-time withstand rating.
• Rear horizontal (HR) main terminals.
• Designed for high-current low-voltage power distribution and protection.
• Part of ABB's modular SACE Emax 2 air circuit breaker platform.
• Suitable for main incomers, transformer secondaries and major distribution feeders.

High-Performance Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 provide protection, switching and isolation for major low-voltage electrical circuits. The E4.2V frame combines a substantial 4000 A current rating with a 150 kA breaking-performance rating and 100 kA short-time withstand rating, making it particularly suitable for installations where very high prospective fault currents must be managed safely.

The Ekip Dip LI trip unit provides electronic long-time overload and instantaneous short-circuit protection. Long-time protection responds to sustained overcurrent conditions that could otherwise cause excessive thermal stress, while instantaneous protection provides rapid operation during severe short-circuit faults, helping protect conductors, switchgear and other equipment within a correctly coordinated electrical system.

Typical Applications

• High-current industrial low-voltage switchboards.
• Main incomer and 4000 A feeder protection.
• Transformer secondary distribution systems.
• Manufacturing and process-industry electrical installations.
• Commercial and infrastructure power distribution.
• Data centres and critical electrical infrastructure.
• Utility and generator-fed distribution circuits.
• Installations requiring high breaking performance with LI electronic protection.