1SDA125477R1 ABB E4.3V 2000 Ekip Aware LSI 3-Pole Air Circuit Breaker

Why Choose the ABB 1SDA125477R1 E4.3V 2000 Ekip Aware LSI Air Circuit Breaker?

The ABB 1SDA125477R1 is a high-performance Emax 3 air circuit breaker moving part designed for demanding low-voltage electrical distribution systems. Configured as an E4.3V 2000 three-pole withdrawable breaker, it provides a rated uninterrupted current of 2000 A and combines high fault-interruption capability with the serviceability of withdrawable switchgear.

Protection is provided by the ABB Ekip Aware LSI electronic trip unit, offering long-time, short-time and instantaneous overcurrent protection. Its adjustable settings include an overload protection range of 800–2000 A, short-time short-circuit adjustment from 1200–20000 A and instantaneous protection adjustment from 3000–30000 A.

The E4.3V configuration provides a rated ultimate short-circuit breaking capacity of 150 kA at 400 V AC. Supplied as the moving part of a withdrawable circuit breaker, the 1SDA125477R1 connects through a separate fixed chassis and includes four change-over auxiliary contacts, trip signalling and open/closed breaker position indication.

Key Advantages

• High-capacity 2000 A air circuit breaker for demanding low-voltage distribution systems.
• Ekip Aware LSI electronic trip unit provides adjustable long-time, short-time and instantaneous protection.
• High 150 kA ultimate short-circuit breaking capacity at 400 V AC.
• Withdrawable moving-part construction supports convenient isolation, inspection and maintenance.
• Adjustable overload protection from 800–2000 A.
• Adjustable short-time short-circuit protection from 1200–20000 A.
• Adjustable instantaneous short-circuit protection from 3000–30000 A.
• Four change-over auxiliary contacts plus trip signalling support switchgear monitoring and control.

Key Features

• ABB SACE Emax 3 series.
• E4.3V 2000 configuration.
• 2000 A rated uninterrupted current.
• Three-pole configuration.
• Ekip Aware electronic trip unit.
• LSI protection functions.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• 150 kA Icu at 400 V AC.
• Withdrawable moving-part construction.
• Connection through a separate fixed chassis.
• Four change-over auxiliary contacts.
• Trip contact and open/closed position indication.
• IP30 protection rating.
• Optional motor-operated mechanism.

Advanced Protection for High-Current Power Distribution

High-current low-voltage distribution systems require circuit breakers capable of protecting conductors, switchgear and connected equipment against overload and short-circuit conditions. The ABB SACE Emax 3 platform combines high-performance air circuit-breaker technology with advanced electronic protection, and the E4.3V configuration delivers an ultimate short-circuit breaking capacity of 150 kA at 400 V AC for demanding installations.

The Ekip Aware LSI trip unit fitted to the 1SDA125477R1 provides adjustable long-time, short-time and instantaneous protection functions. Combined with the 2000 A rating and withdrawable moving-part construction, it provides a flexible solution for high-capacity switchboards where dependable protection, selective coordination and maintainability are important.

Typical Applications

• Main low-voltage switchboards.
• Industrial power distribution systems.
• Data centres and critical power infrastructure.
• Commercial and large-building electrical distribution.
• Manufacturing and process facilities.
• Utility and infrastructure power distribution.
• Transformer and generator protection systems.