Why Choose the ABB 1SDA128900R1 E4.3H 4000 Ekip Aware LSIG 4p F HR Air Circuit Breaker?
The ABB 1SDA128900R1 is a high-performance low voltage air circuit breaker (ACB) designed for advanced electrical distribution, protection and switching applications. As part of the innovative ABB SACE Emax 3 E4.3 series, it combines intelligent protection technology, high current handling capability and reliable operation for demanding industrial and commercial power systems.
This circuit breaker features an advanced Ekip Aware LSIG electronic trip unit, providing comprehensive protection functions including long-time, short-time, instantaneous and ground fault protection. The Emax 3 platform delivers enhanced monitoring, diagnostics, power management and digital connectivity capabilities for modern low voltage installations.
With a 4000 A rated current, 4-pole fixed configuration, E4.3H high-performance frame and rear horizontal terminals, the ABB 1SDA128900R1 is suitable for high-capacity switchboards, industrial distribution systems and critical power infrastructure requiring dependable circuit protection.
Key Advantages
- Advanced ABB SACE Emax 3 air circuit breaker technology for reliable power protection.
- 4000 A rated current suitable for high-capacity low voltage distribution systems.
- Four-pole fixed design for complete circuit switching and protection.
- Integrated Ekip Aware LSIG protection unit for comprehensive fault management.
- E4.3H high-performance frame designed for demanding electrical installations.
- Rear horizontal terminals provide flexible switchgear integration.
Key Features
- ABB SACE Emax 3 E4.3 series air circuit breaker.
- Ekip Aware LSIG electronic trip unit.
- 4000 A rated uninterrupted current.
- 4-pole configuration.
- Fixed installation version.
- Rear horizontal (HR) terminal connection.
- Long-time, short-time, instantaneous and ground fault protection functions.
- Advanced monitoring and communication capability for intelligent power systems.
Reliable Power Protection for Industrial Distribution
Air circuit breakers such as the ABB Emax 3 series provide essential protection against overloads and short circuits while enabling safe switching and efficient management of electrical distribution networks. Their intelligent electronic trip units allow accurate protection settings, diagnostics and improved operational visibility.
The Emax 3 platform is engineered for future-ready electrical infrastructure, combining adaptive protection, advanced power quality monitoring, asset management features and scalable connectivity to support reliable operation in demanding environments.
Typical Applications
- Main low voltage distribution switchboards.
- Industrial power distribution systems.
- Large manufacturing facilities.
- Commercial building electrical infrastructure.
- Energy management and monitoring systems.
- Critical power protection installations.
