1SDA072804R1 ABB Emax 2 E1.2B 1250 Ekip Touch LI 4-Pole Air Circuit Breaker

Why Choose the ABB 1SDA072804R1 Emax 2 E1.2B 1250 Air Circuit Breaker?

The ABB 1SDA072804R1 is a SACE Emax 2 E1.2B air circuit breaker designed for protection and switching in low-voltage electrical distribution systems. Configured as the E1.2B 1250 Ekip Touch LI 4p WMP, this four-pole withdrawable moving part combines a 1250 A rated uninterrupted current with ABB's advanced Ekip Touch LI solid-state electronic protection release.

The Ekip Touch LI release provides long-time overload and instantaneous short-circuit protection. This electronic protection combination safeguards distribution circuits against sustained overloads and high-current short circuits, while the Ekip Touch platform provides advanced protection configuration, measurement and monitoring capabilities.

The E1.2B performance level provides an ultimate short-circuit breaking capacity of 42 kA at 400–690 V AC and a rated short-time withstand current of 42 kA for 1 s. Its four-pole withdrawable construction is designed for use with the corresponding Emax 2 fixed part and includes four auxiliary contacts plus circuit-breaker open/closed position indication.

Key Advantages

• Rated uninterrupted current of 1250 A for substantial low-voltage distribution loads.
• Four-pole configuration for applications requiring four-pole switching and protection.
• Advanced Ekip Touch LI solid-state electronic protection release.
• Long-time overload and instantaneous short-circuit protection functions.
• 42 kA ultimate short-circuit breaking capacity at 400–690 V AC.
• 42 kA short-time withstand current for 1 s.
• Withdrawable moving-part construction supports convenient inspection, servicing and replacement.

Key Features

• ABB SACE Emax 2 E1.2 air circuit breaker platform.
• 1250 A rated uninterrupted current.
• Four-pole configuration.
• B short-circuit performance level.
• Ekip Touch LI solid-state electronic protection release.
• Long-time (L) overload protection.
• Instantaneous (I) short-circuit protection.
• 42 kA Icu at 400–690 V AC.
• Rated service short-circuit breaking capacity Ics = 100% of Icu.
• 42 kA Icw for 1 s and 24 kA for 3 s.
• Rated operational voltage up to 690 V AC.
• Rated insulation voltage of 1000 V AC.
• Four auxiliary contacts with circuit-breaker open/closed position indication.
• Withdrawable moving part (WMP) configuration.

Advanced LI Protection for Low-Voltage Power Distribution

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

The Ekip Touch LI release combines long-time overload and instantaneous short-circuit protection in an advanced electronic trip-unit platform. Together with the 1250 A E1.2B frame, 42 kA breaking capacity and withdrawable architecture, the ABB 1SDA072804R1 provides a capable solution for distribution switchboards requiring dependable electronic protection and service-friendly circuit-breaker construction.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial electrical distribution systems.
• Transformer and feeder protection.
• Manufacturing and process facilities.
• Commercial and institutional building power distribution.
• Infrastructure electrical installations.