1SDA072943R1 ABB Emax 2 E2.2S 1250 Ekip Dip LSIG 4-Pole Air Circuit Breaker

Why Choose the ABB 1SDA072943R1 Emax 2 Air Circuit Breaker?

The ABB 1SDA072943R1 is a high-performance Emax 2 E2.2S 1250 A four-pole air circuit breaker moving part designed for protection, switching and control in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax 2 air circuit breaker series, it combines robust withdrawable construction with the dependable Ekip Dip LSIG electronic trip unit.

The Ekip Dip LSIG release provides long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection. Protection parameters are configured using DIP switches, providing straightforward adjustment for distribution applications requiring comprehensive electronic protection without a touchscreen interface.

With a rated current of 1250 A, a four-pole configuration, an ultimate short-circuit breaking capacity of 85 kA at 400–440 V AC and 66 kA at 500–690 V AC, the 1SDA072943R1 provides dependable fault-interruption capability for high-current distribution circuits. Its withdrawable moving-part design enables integration with the appropriate Emax 2 E2.2 fixed part and supports efficient inspection, maintenance and replacement within switchgear assemblies.

Key Advantages

• High-performance ABB Emax 2 air circuit breaker moving part for demanding low-voltage power distribution.
• 1250 A rated current for industrial, commercial and infrastructure installations.
• Four-pole configuration with a neutral pole rated at 100% of rated current.
• 85 kA ultimate short-circuit breaking capacity at 400–440 V AC.
• 66 kA ultimate short-circuit breaking capacity at 500–690 V AC.
• 66 kA rated short-time withstand current for 1 s.
• Comprehensive Ekip Dip LSIG electronic protection covering overload, short-circuit and earth-fault conditions.
• Withdrawable construction supports efficient switchboard inspection, maintenance and servicing.

Key Features

• ABB SACE Emax 2 E2.2S series.
• 1250 A rated current.
• Four-pole air circuit breaker moving part.
• Ekip Dip LSIG electronic protection release.
• Long-time overload (L) protection adjustable from 0.4–1 × In.
• Short-time selective short-circuit (S) protection.
• Instantaneous short-circuit (I) protection adjustable from 1.5–15 × In.
• Earth-fault (G) protection adjustable from 0.1–1 × In.
• Protection settings configured through DIP switches.
• 85 kA Icu at 400–440 V AC.
• 66 kA Icu at 500–690 V AC.
• 66 kA Icw for 1 s and 50 kA Icw for 3 s.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Withdrawable moving-part configuration for Emax 2 switchgear.

Comprehensive LSIG Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB Emax 2 E2.2S provide switching, isolation and protection for high-current low-voltage distribution circuits. The E2.2S performance level combines an 85 kA breaking capacity at 400–440 V AC with a 66 kA short-time withstand rating for 1 s, making it suitable for main switchboards and demanding distribution systems where high fault levels, protection selectivity and continuity of service must be considered.

The Ekip Dip LSIG trip unit provides comprehensive protection against long-time overloads, short-time and instantaneous short circuits, and earth faults. Combined with the E2.2S frame's high breaking capacity and withdrawable architecture, the 1SDA072943R1 provides a robust protection solution for industrial and commercial distribution systems while allowing straightforward protection adjustment through DIP switches.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical installations.
• Manufacturing and process plants.
• Power distribution and switchgear assemblies.
• Transformer-fed low-voltage distribution systems.
• Critical power and high-availability installations.