Why Choose the ABB 1SDA124928R1?
The ABB 1SDA124928R1 is an SACE Emax 3 E4.3H 4000 Ekip Aware LSI 3-pole fixed air circuit breaker designed for high-current low-voltage power distribution and demanding circuit protection applications.
With a 4000 A rated current, Ekip Aware electronic trip unit and LSI protection, this air circuit breaker provides long-time overload, short-time short-circuit and instantaneous short-circuit protection for critical electrical installations.
The fixed 3-pole configuration with rear horizontal terminals provides a practical solution for integration into compatible switchboards and distribution assemblies requiring high-capacity protection and reliable switching performance.
Key Advantages
- 4000 A rated current for high-capacity power distribution systems
- Ekip Aware electronic release for advanced protection and monitoring
- LSI protection combining long-time, short-time and instantaneous protection functions
- 100 kA Icu at 400 V AC for high short-circuit interruption capability
- 3-pole fixed construction for secure switchboard installation
- Rear horizontal terminals for practical connection within compatible assemblies
- Suitable for demanding industrial, commercial and infrastructure power distribution applications
Key Features
- ABB SACE Emax 3 E4.3H series air circuit breaker
- Order code: 1SDA124928R1
- Rated current: 4000 A
- 3-pole fixed version
- Ekip Aware electronic trip unit
- LSI protection functions
- Rear horizontal connection configuration
- Four auxiliary contacts and open/closed position indication
- Optional motor operator available
High-Current Power Distribution and Protection
The ABB 1SDA124928R1 combines the high-current capability of the Emax 3 E4.3H platform with an Ekip Aware electronic trip unit. Its LSI protection functions provide coordinated protection against overloads, short-time fault currents and high-current instantaneous short-circuit events.
With its fixed 3-pole construction, rear horizontal terminals and 4000 A continuous current rating, this air circuit breaker is designed for integration into high-capacity switchboards, distribution panels and other low-voltage power systems.
Typical Applications
- Low-voltage main distribution switchboards
- Industrial power distribution systems
- Commercial electrical distribution equipment
- High-current feeder protection
- Transformer and generator protection
- Manufacturing and process plants
- Large building electrical infrastructure
- Data centre and critical power distribution systems
