1SDA072823R1 ABB E1.2N 1250 Ekip Dip LSIG 4p WMP Air Circuit Breaker

Why Choose the ABB E1.2N 1250 Ekip Dip LSIG 4p WMP Air Circuit Breaker?

The ABB 1SDA072823R1 is a SACE Emax 2 E1.2N air circuit breaker (ACB) designed for dependable protection and switching in low-voltage electrical distribution systems. Rated at 1250 A, this four-pole breaker combines ABB’s compact E1.2N frame with an Ekip Dip LSIG electronic trip unit providing long-time overload, short-time delayed, instantaneous short-circuit and earth-fault protection.

The Ekip Dip LSIG release provides adjustable electronic protection using straightforward DIP-switch settings. Its LSIG functionality gives comprehensive protection against overloads, selective short circuits, instantaneous short circuits and earth faults, making the breaker suitable for distribution systems where coordinated protection and earth-fault detection are required.

The 1SDA072823R1 is a four-pole withdrawable mobile part (WMP) with a rated uninterrupted current of 1250 A and rated operational voltage of 690 V AC. The E1.2N performance level provides an ultimate short-circuit breaking capacity of 66 kA at 400–440 V AC, reducing to 50 kA at 500–690 V AC, together with a rated short-time withstand current of 50 kA for 1 second.

Key Advantages

• 1250 A rated uninterrupted current for substantial low-voltage distribution loads.
• 690 V AC rated operational voltage supports a broad range of LV distribution applications.
• 66 kA ultimate short-circuit breaking capacity at 400–440 V AC.
• 50 kA ultimate breaking capacity at 500–690 V AC.
• 50 kA short-time withstand current for 1 second supports selective protection strategies.
• Ekip Dip LSIG electronic trip unit provides adjustable overload and short-circuit protection.
• Integrated earth-fault protection provides additional protection against faults to earth.
• Four-pole configuration with 100% neutral-pole current capability suits three-phase four-wire distribution networks.
• Withdrawable mobile-part construction facilitates isolation, inspection, servicing and switchboard maintenance.

Key Features

• ABB SACE Emax 2 E1.2N series.
• 1250 A rated uninterrupted current.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Four-pole configuration.
• 100% neutral-pole current rating.
• N short-circuit performance level.
• 66 kA Icu at 400–440 V AC.
• 50 kA Icu at 500–690 V AC.
• 50 kA Icw for 1 second.
• 30 kA Icw for 3 seconds.
• Ekip Dip LSIG electronic trip unit.
• LSIG protection provides long-time overload, short-time delayed, instantaneous short-circuit and earth-fault protection.
• 500–1250 A long-time overload adjustment range.
• 750–12500 A short-time protection adjustment range.
• 1875–18750 A instantaneous protection adjustment range.
• 125–1250 A earth-fault protection adjustment range.
• Protection settings configured through DIP switches.
• Withdrawable mobile part (WMP) configuration.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Comprehensive LSIG Distribution Protection

The ABB SACE Emax 2 E1.2N combines compact construction with robust fault-current performance for low-voltage networks requiring coordinated circuit protection. With a rated uninterrupted current of 1250 A, an ultimate breaking capacity of 66 kA at 400–440 V AC and a short-time withstand capability of 50 kA for 1 second, this configuration provides dependable protection for demanding commercial and industrial distribution systems.

The Ekip Dip LSIG electronic trip unit provides adjustable long-time overload, short-time delayed, instantaneous short-circuit and earth-fault protection. The short-time function supports selective coordination between protective devices, while the integrated earth-fault function provides an additional layer of protection against faults to earth. DIP-switch adjustment provides a straightforward method of configuring the principal protection thresholds.

Typical Applications

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