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Circuit-breaker, 3p, 3200 A, fixed
Air Circuit Breakers
Air Circuit Breakers (ACBs) are high-performance protective devices designed for low-voltage power distribution systems, typically rated for currents from 630A up to 6300A. These units feature advanced arc extinction technology using air at atmospheric pressure, ensuring reliable interruption of fault currents. Key technical specifications inclu...
Air Circuit Breakers (ACBs) are high-performance protective devices designed for low-voltage power distribution systems, typically rated for currents from 630A up to 6300A. These units feature advanced arc extinction technology using air at atmospheric pressure, ensuring reliable interruption of fault currents. Key technical specifications include number of poles (3P or 4P), breaking capacity up to 100kA at 415V AC, and adjustable protection settings for long-time delay, short-time delay, instantaneous, and ground fault. ACBs come in fixed or drawout versions, with the latter allowing easy maintenance without disconnecting power cables. Accessories such as protection relays (e.g., AGR series), shunt trips, undervoltage releases, auxiliary switches, and charging motors enhance functionality. The drawout chassis design enables safe racking in and out, while door flanges provide IP20 or IP31 ingress protection. These breakers are also known as power circuit breakers or air blast circuit breakers in various regions.
Applications for Air Circuit Breakers span critical sectors including industrial plants, commercial buildings, data centers, and power generation facilities. They are primarily installed in main distribution boards (MDBs), switchgear panels, and motor control centers (MCCs) for incoming feeder protection, bus tie connections, and large motor or transformer protection. ACBs are ideal for systems requiring high short-circuit withstand capacity and selective coordination, such as in manufacturing lines, hospitals, airports, and renewable energy installations like solar farms. Their drawout capability makes them suitable for applications where minimal downtime is essential, allowing quick replacement or maintenance.
These devices comply with international standards IEC 60947-2 and UL 1066, ensuring global acceptance. Terasaki ACBs are fully compatible with their own range of accessories and protection relays, including the AGR-11BL-AL and AGR-31BR-PG series. The modular design allows integration with other switchgear components from the same manufacturer, ensuring seamless coordination. All units undergo rigorous testing for dielectric strength, temperature rise, and mechanical endurance, meeting requirements for marine, industrial, and utility applications.
Electric Automation Network offers a comprehensive range of Terasaki Air Circuit Breakers and accessories with real-time pricing and technical documentation. Our engineering team provides personalized support for selection, coordination studies, and troubleshooting. Benefit from express worldwide shipping and access to detailed datasheets for every article. Whether you need a complete ACB unit or spare parts like charging motors or auxiliary switches, we ensure fast delivery and expert guidance.
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