1SDA072672R1 ABB E1.2N 250 Ekip Dip LSI 4p WMP Air Circuit Breaker

Why Choose the ABB E1.2N 250 Ekip Dip LSI 4p WMP Air Circuit Breaker?

The ABB 1SDA072672R1 is a SACE Emax 2 E1.2N air circuit breaker (ACB) designed for reliable protection and switching in low-voltage electrical distribution systems. Rated at 250 A, this four-pole breaker combines ABB’s compact E1.2N frame with an Ekip Dip LSI electronic trip unit providing long-time overload, short-time delayed and instantaneous short-circuit protection.

As part of the ABB SACE Emax 2 air circuit breaker series, the E1.2N combines compact construction with high short-circuit performance and flexible switchboard integration. Its four-pole configuration enables switching and isolation of the neutral conductor together with the three phases, making it particularly suitable for three-phase four-wire distribution networks.

The 1SDA072672R1 is a four-pole withdrawable mobile part (WMP) with a rated uninterrupted current of 250 A. 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 second, supporting dependable protection and selective coordination in commercial, industrial and infrastructure power distribution systems.

Key Advantages

• 250 A rated uninterrupted current for low-voltage distribution and feeder protection.
• 66 kA ultimate short-circuit breaking capacity at 440 V AC.
• 50 kA short-time withstand current for 1 second supports selective protection strategies.
• Ekip Dip LSI electronic trip unit provides adjustable overload and short-circuit protection.
• Long-time, short-time and instantaneous protection enables improved coordination with upstream and downstream protective devices.
• Four-pole configuration enables switching and isolation of the neutral conductor together with the three phases.
• Withdrawable mobile-part construction facilitates isolation, inspection, servicing and switchboard maintenance.

Key Features

• ABB SACE Emax 2 E1.2N series.
• 250 A rated uninterrupted current.
• Four-pole configuration.
• N performance level.
• 66 kA Icu at 440 V AC.
• 50 kA Icw for 1 second.
• Ekip Dip LSI electronic trip unit.
• LSI protection provides long-time overload, short-time delayed and instantaneous short-circuit protection.
• Short-time protection supports selective coordination between protective devices.
• No integrated earth-fault protection in the LSI configuration.
• Withdrawable mobile part (WMP) configuration.
• Designed for use with the corresponding Emax 2 E1.2 fixed part.
• Suitable for three-phase four-wire low-voltage distribution systems.

Selective Four-Pole Circuit Protection

The ABB SACE Emax 2 E1.2N provides compact air circuit breaker protection for low-voltage networks requiring dependable interruption of overload and short-circuit currents. With a rated current of 250 A, an ultimate breaking capacity of 66 kA at 440 V AC and a short-time withstand current of 50 kA for 1 second, this configuration combines compact dimensions with substantial fault-current capability.

The Ekip Dip LSI electronic trip unit provides long-time overload, short-time delayed and instantaneous short-circuit protection. The additional short-time protection function compared with an LI release supports improved selectivity and coordination within multi-level distribution systems, while the four-pole arrangement enables simultaneous switching and isolation of phase and neutral conductors.

Typical Applications

• Low-voltage main and sub-distribution switchboards.
• Three-phase four-wire electrical distribution systems.
• Commercial building power distribution.
• Industrial feeder and distribution protection.
• Transformer secondary distribution systems.
• Infrastructure and utility installations.
• Systems requiring selective short-circuit protection.
• Switchboards requiring withdrawable four-pole circuit breaker construction.