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Intelligent Air Circuit Breaker (ACB): CE Certified Low Voltage Main Distribution Solution
2026-07-26
With the rapid growth of modern industrial plants, commercial buildings, data centers and renewable energy power stations, low-voltage power distribution systems require higher safety standards, stable performance and intelligent protection functions. As the core main protection device in low-voltage switchgear systems, the Air Circuit Breaker (ACB)plays a key role in main incoming line protection, busbar coupling and automatic fault isolation.
To meet increasing global market demands, ELECO has upgraded its full series of intelligent Air Circuit Breakers. All ELECO ACB units are CE certified and fully compliant with EU Low Voltage Directive and international EN/Iec 60947-2 standards, ensuring stable, safe and standard power protection for worldwide industrial and commercial projects.
What is an Air Circuit Breaker (ACB)?
An Air Circuit Breaker (ACB), also known as a frame circuit breaker, is a large-current air-insulated electrical protection device used exclusively for low-voltage main distribution systems. It uses air as the arc-extinguishing medium to safely disconnect overload currents, short-circuit currents and earth faults.
Compared with MCB and mccb for terminal and branch circuit protection, ACBs are designed forprimary power distribution. They support short-time withstand current and selective protection coordination, making them essential equipment for factories, power plants and large-scale infrastructure projects.
CE Certification & International Standard Compliance
Every ELECO intelligent ACB undergoes strict third-party performance testing and obtains valid CE certification. The whole product design, mechanical performance and electrical characteristics fully comply with EN/Iec 60947-2 international standards and EU low-voltage safety regulations.
Standardized and certified performance ensures stable operation in global projects and simplifies engineering acceptance for electrical contractors, panel builders and EPC companies across Europe, the Middle East, Southeast Asia and other international markets.
Key Benefits of ELECO Intelligent ACB Series
1. Excellent Short-Circuit Breaking Capacity: ELECO ACB provides an ultimate short-circuit breaking capacity (Icu) up to 150kA. It can instantly isolate severe circuit faults and effectively protect switchgear and backend equipment from damage, avoiding large-area power system failures.
2. Intelligent Adjustable Protection System: Equipped with a high-precision electronic trip unit, the ACB supports fully adjustable overload, short-delay, instantaneous, and earth fault protection settings. Optional communication modules allow remote monitoring, data recording, fault alarm, and centralized power management, perfectly adapting to smart grid and intelligent building systems.
3. Dual Structure: Fixed Type & Draw-Out Type The series provides both fixed and draw-out structures with 3P and 4P optional configurations. The draw-out ACB allows safe racking in and out without busbar power failure, greatly facilitating on-site inspection, routine maintenance, and replacement, reducing project downtime and maintenance costs.
4. Stable Performance in Complex Environments: Optimized arc quenching structure reduces temperature rise during long-term operation. High-quality mechanical components and anti-aging materials ensure reliable performance under high temperature, high humidity and vibration conditions, suitable for industrial, energy storage, petrochemical, and outdoor power distribution scenarios.
5. Complete Standard Accessories:A full set of optional accessories is available, including motor operating mechanisms, under-voltage releases, shunt releases, Auxiliary Contacts, and mechanical interlocks. All accessories comply with CE and IEC standards to support customized switchgear design for different project requirements.
Common Applications of CE-Certified ACB
ELECO intelligent ACB breakers are widely applied in global low-voltage main distribution scenarios, including:
- Industrial factory main distribution boards
- Data center power supply systems
- High-rise buildings, hospitals, airports and subway infrastructure
- Photovoltaic power stations, energy storage systems and generator sets
- Petrochemical, mining and heavy-duty industrial projects
ACB vs MCCB: How to Choose Correctly for Power Projects
Many electrical designers confuse ACB and MCCB in system design. The two devices serve completely different distribution positions:
Air Circuit Breaker (ACB): Used for main incoming and busbar protection, current range 630A–6300A. Supports selective protection and draw-out installation. Applied for primary distribution rooms and critical power supply systems.
Molded Case Circuit Breaker (MCCB): Used for secondary branch circuit protection, current range 16A–2500A. Compact size and fixed installation, mainly used for terminal power distribution circuits.
Conclusion
As global electrical safety regulations continue to improve, CE-certified and standard-compliant air circuit breakers have become basic requirements for international project bidding and market access. ELECO insists on high-quality manufacturing and continuous technical upgrading, providing reliable, intelligent, and cost-effective ACB solutions for global panel builders, electrical contractors, and EPC engineering companies.
Contact our professional team to get detailed ACB datasheets, technical parameters, and customized project quotations.