1SDA072543R1 ABB E4.2N 4000 Ekip Dip LSIG 3p WMP Air Circuit Breaker 4000 A

Why Choose the ABB E4.2N 4000 Ekip Dip LSIG 3p WMP Air Circuit Breaker?

The ABB E4.2N 4000 Ekip Dip LSIG 3p WMP, order code 1SDA072543R1, is a high-capacity three-pole air circuit breaker (ACB) from the ABB SACE Emax 2 range, designed for protection and switching in demanding low-voltage power distribution systems. With a 4000 A rated uninterrupted current and ABB's Ekip Dip LSIG electronic trip unit, it provides long-time, short-time, instantaneous and earth-fault protection.

The E4.2N combines substantial current-carrying capability with dependable short-circuit performance for industrial, commercial and infrastructure power networks. This N-performance model provides a rated ultimate short-circuit breaking capacity of 66 kA at 400–690 V AC, with a rated service short-circuit breaking capacity equal to 100% of Icu.

The 1SDA072543R1 is the moving part of a withdrawable circuit breaker and features a three-pole configuration. It has a rated operational voltage of 690 V AC, a rated insulation voltage of 1000 V AC and a rated impulse withstand voltage of 12 kV. Its Ekip Dip LSIG release combines overload, selective short-circuit, instantaneous short-circuit and earth-fault protection for comprehensive electrical distribution protection.

Key Advantages

• High-capacity 4000 A air circuit breaker for major low-voltage distribution circuits.
• 66 kA ultimate breaking capacity across demanding low-voltage applications.
• Ekip Dip LSIG electronic protection with long-time, short-time, instantaneous and earth-fault functions.
• Three-pole withdrawable moving-part configuration supports convenient switchgear servicing and maintenance.
• Rated operational voltage of 690 V AC.
• High 66 kA short-time withstand current for 1 s supports selective protection architectures.

Key Features

• ABB SACE Emax 2 E4.2N series.
• 4000 A rated uninterrupted current.
• Three-pole configuration.
• Ekip Dip LSIG solid-state electronic release.
• Long-time overload, short-time, instantaneous and earth-fault protection.
• 66 kA Icu at 400–690 V AC.
• 66 kA Icw for 1 s and 50 kA for 3 s.
• Adjustable overload protection from 1600–4000 A.
• Instantaneous short-circuit adjustment up to 15 × In.
• Four auxiliary change-over contacts.
• Circuit-breaker open/closed position indication.
• Withdrawable moving-part configuration for compatible SACE Emax 2 switchgear.

Comprehensive Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 provide switching, isolation and circuit protection for high-current low-voltage electrical networks. The E4.2N frame combines a 4000 A current rating with 66 kA short-circuit breaking capacity, making it suitable for major incoming and distribution circuits where dependable operation and coordinated protection are required.

The Ekip Dip LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Combined with the withdrawable construction and high current capacity of the E4.2N, this makes the 1SDA072543R1 particularly suitable for sophisticated distribution systems where selectivity, earth-fault detection, serviceability and dependable circuit protection are important.

Typical Applications

• Main low-voltage electrical switchboards.
• Industrial power distribution systems.
• Manufacturing and process plant switchgear.
• Commercial and infrastructure power distribution.
• Transformer and installation protection.
• High-current incoming and distribution feeders.
• Selective protection systems requiring LSIG functionality.
• Applications requiring integrated earth-fault protection.
• Withdrawable switchgear assemblies requiring high-current circuit protection.