1SDA072812R1 ABB E1.2C 1250 Ekip Dip LSI 4P Air Circuit Breaker

Why Choose the ABB 1SDA072812R1 Emax 2 Air Circuit Breaker?

The ABB 1SDA072812R1 is a high-performance SACE Emax 2 E1.2C air circuit breaker designed for reliable protection and control of low-voltage electrical distribution systems. Configured as an E1.2C 1250 Ekip Dip LSI 4p WMP, this four-pole withdrawable moving part combines a 1250 A rated current with ABB's Ekip Dip LSI electronic protection release.

As part of the ABB SACE Emax 2 air circuit breaker series, the E1.2C is engineered for demanding industrial, commercial and infrastructure power distribution applications. The Ekip Dip LSI trip unit provides adjustable long-time overload, short-time selective short-circuit and instantaneous short-circuit protection, with settings configured through straightforward DIP switches.

The E1.2C performance level provides a rated ultimate short-circuit breaking capacity of 50 kA at 380–440 V AC and 42 kA at 500–690 V AC. Its 1250 A rating, four-pole configuration and withdrawable construction make the 1SDA072812R1 well suited to substantial switchboard applications where dependable fault interruption, protection selectivity and convenient maintenance are required.

Key Advantages

• High-performance ABB SACE Emax 2 air circuit breaker for low-voltage power distribution.
• 1250 A rated current for substantial industrial and commercial electrical loads.
• 50 kA ultimate short-circuit breaking capacity at 380–440 V AC.
• 42 kA ultimate short-circuit breaking capacity at 500–690 V AC.
• Ekip Dip LSI electronic protection release for configurable overcurrent protection.
• Integrated long-time, short-time and instantaneous protection functions.
• DIP-switch adjustment provides straightforward configuration of the principal protection parameters.
• Four-pole withdrawable moving-part construction supports convenient isolation, inspection and maintenance.

Key Features

• ABB SACE Emax 2 E1.2C series.
• 1250 A rated current.
• 4-pole configuration.
• Ekip Dip LSI electronic trip unit.
• 50 kA Icu at 380–440 V AC.
• 42 kA Icu at 500–690 V AC.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 50 / 60 Hz operating frequency.
• Adjustable long-time overload protection.
• Adjustable short-time selective short-circuit protection.
• Adjustable instantaneous short-circuit protection.
• DIP-switch protection setting interface.
• Four auxiliary contacts fitted to the moving part.
• Circuit-breaker open/closed position indication.
• Withdrawable moving-part design for use with the corresponding Emax 2 fixed part.

Selective Circuit Protection and Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 E1.2C protect low-voltage electrical distribution systems against potentially damaging overload and short-circuit conditions while providing dependable switching and isolation. With a 50 kA breaking capacity at 380–440 V AC, this E1.2C configuration provides robust fault interruption for substantial switchboards, feeders and connected electrical equipment.

The Ekip Dip LSI electronic trip unit adds adjustable short-time protection between the long-time overload and instantaneous protection stages. This enables improved coordination and selectivity between protective devices, while the DIP-switch interface and Emax 2 withdrawable architecture provide a practical combination of straightforward configuration, dependable protection and convenient maintenance.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Commercial building electrical distribution.
• Manufacturing and process facilities.
• Infrastructure and utility installations.
• Incoming and outgoing high-current switchboard feeders.
• Distribution systems requiring selective LSI overcurrent protection.
• Switchboards requiring four-pole withdrawable circuit breaker assemblies.