1SDA072678R1 ABB Emax 2 E1.2N 250 Ekip Hi-Touch LSI 4-Pole Air Circuit Breaker

Why Choose the ABB 1SDA072678R1 Emax 2 E1.2N 250 Air Circuit Breaker?

The ABB 1SDA072678R1 is a high-performance SACE Emax 2 E1.2N air circuit breaker designed for protection, control and management of low-voltage electrical distribution systems. Configured as the E1.2N 250 Ekip Hi-Touch LSI 4p WMP, this four-pole withdrawable moving part combines a 250 A rated current with ABB's advanced Ekip Hi-Touch electronic protection release.

As part of the ABB SACE Emax 2 range, this circuit breaker provides LSI protection functions covering long-time overload, short-time short-circuit and instantaneous short-circuit protection. The Ekip Hi-Touch release provides advanced protection, measurement and power-management capabilities for sophisticated industrial, commercial and infrastructure power-distribution systems.

The E1.2N 250 is rated for operation up to 690 V AC and provides an ultimate short-circuit breaking capacity of 66 kA at 400–440 V AC and 50 kA at 500–690 V AC. Its four-pole withdrawable construction supports straightforward servicing and maintenance within compatible Emax 2 switchboards, while the neutral pole is rated at 100% of the rated uninterrupted current.

Key Advantages

• Compact 250 A Emax 2 air circuit breaker for low-voltage power distribution.
• Four-pole configuration with a 100% rated neutral pole.
• Advanced Ekip Hi-Touch LSI electronic protection release.
• LSI functions provide long-time, short-time and instantaneous circuit protection.
• 66 kA ultimate short-circuit breaking capacity at 400–440 V AC.
• 50 kA short-time withstand current for 1 s supports selective protection strategies.
• Withdrawable moving-part construction supports efficient switchboard servicing and maintenance.

Key Features

• ABB SACE Emax 2 E1.2 air circuit breaker platform.
• 250 A rated uninterrupted current.
• Four-pole configuration.
• N short-circuit performance level.
• Ekip Hi-Touch LSI electronic protection release.
• Long-time (L) overload protection.
• Short-time (S) short-circuit protection.
• Instantaneous (I) short-circuit protection.
• 66 kA Icu at 400–440 V AC.
• 50 kA Icu at 500–690 V AC.
• 50 kA Icw for 1 s and 30 kA for 3 s.
• Rated insulation voltage of 1000 V AC.
• Rated impulse withstand voltage of 12 kV.
• Withdrawable moving-part format for compatible Emax 2 switchboards.

Advanced Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 E1.2N provide switching and protection for low-voltage electrical distribution systems. The electronic protection release monitors circuit conditions and initiates interruption when configured thresholds are exceeded, helping protect conductors, switchgear and connected equipment against overload and short-circuit conditions.

The Ekip Hi-Touch LSI release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with the compact E1.2 frame, four-pole configuration and withdrawable architecture, this model provides a flexible solution for switchboards requiring advanced electronic protection, high system availability and straightforward maintenance.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution installations.
• Manufacturing and process facilities.
• Commercial building electrical distribution.
• Infrastructure and utility power systems.
• Critical-power and energy-management switchboards.