1SDA072742R1 ABB Emax 2 E1.2N 800 Ekip Dip LSI 4-Pole Air Circuit Breaker

Why Choose the ABB 1SDA072742R1 Emax 2 E1.2N 800 Air Circuit Breaker?

The ABB 1SDA072742R1 is a high-performance SACE Emax 2 E1.2N air circuit breaker designed for protection and switching in low-voltage electrical distribution systems. Configured as the E1.2N 800 Ekip Dip LSI 4p WMP, this four-pole withdrawable moving part combines a 800 A rated uninterrupted current with ABB's Ekip Dip LSI electronic protection release.

The Ekip Dip LSI release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Its adjustable electronic protection functions support coordination and selectivity between protective devices, making this configuration suitable for industrial and commercial distribution networks requiring dependable overcurrent protection.

The E1.2N performance level provides an ultimate short-circuit breaking capacity of 66 kA at 440 V AC and a rated short-time withstand current of 50 kA for 1 s. Its four-pole withdrawable moving-part construction connects through a separate chassis part, supporting efficient inspection, servicing and replacement within compatible Emax 2 switchboards.

Key Advantages

• Rated uninterrupted current of 800 A for demanding low-voltage distribution applications.
• Four-pole configuration for switching and protection across four conductors.
• Reliable Ekip Dip LSI electronic protection release.
• Long-time, short-time and instantaneous protection functions support coordinated system protection.
• 66 kA ultimate short-circuit breaking capacity at 440 V AC.
• 50 kA short-time withstand current for 1 s supports selective protection strategies.
• Withdrawable moving-part construction supports efficient switchboard inspection and maintenance.

Key Features

• ABB SACE Emax 2 E1.2 air circuit breaker platform.
• 800 A rated uninterrupted current.
• Four-pole configuration.
• N short-circuit performance level.
• Ekip Dip LSI electronic protection release.
• Long-time (L) overload protection.
• Short-time (S) short-circuit protection.
• Instantaneous (I) short-circuit protection.
• 66 kA Icu at 440 V AC.
• 50 kA Icw for 1 s.
• Rated voltage of 690 V AC.
• Overload release adjustment range of 320–800 A.
• Short-time short-circuit release adjustment range of 480–8000 A.
• Instantaneous short-circuit release adjustment range of 1200–12000 A.
• Four auxiliary change-over contacts.
• Withdrawable construction with main-circuit connection through a separate chassis part.

Selective Protection for Low-Voltage Power Distribution

The ABB SACE Emax 2 E1.2N provides switching and overcurrent protection for low-voltage electrical distribution systems. Its electronic trip unit monitors circuit current and initiates interruption when configured protection thresholds are exceeded, helping protect conductors, switchgear and connected equipment against overload and short-circuit conditions.

The Ekip Dip LSI release combines adjustable long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. The short-time function enables suitable systems to implement selective coordination between upstream and downstream protective devices, while the withdrawable E1.2 construction supports straightforward maintenance and high switchboard serviceability.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial electrical distribution systems.
• Manufacturing and process facilities.
• Commercial building power distribution.
• Infrastructure electrical installations.
• Distribution systems requiring selective short-circuit protection.