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E3
E3 Series Molded Case Circuit Breakers (MCCBs) – High-Performance Power Distribution and Protection
The E3 series represents a premium line of molded case circuit breakers (MCCBs) designed for rigorous industrial and commercial power distribution applications. These devices are engineered to provide reliable overcurrent and short-circuit protecti...
E3 Series Molded Case Circuit Breakers (MCCBs) – High-Performance Power Distribution and Protection
The E3 series represents a premium line of molded case circuit breakers (MCCBs) designed for rigorous industrial and commercial power distribution applications. These devices are engineered to provide reliable overcurrent and short-circuit protection across a wide range of amperages, typically from 100A to 1600A, with voltage ratings up to 690V AC. Available in 3-pole (3P) and 4-pole (4P) configurations, the E3 series offers selectable breaking capacities (Icu) from 25kA to 65kA at 415V AC, ensuring robust performance under fault conditions. Key technical features include electronic trip units with adjustable long-time, short-time, instantaneous, and ground-fault protection curves, as well as rotary handle or motor-operated mechanisms for remote control. The compact design and modular accessories—such as auxiliary contacts, shunt trips, undervoltage releases, and terminal shrouds—make the E3 series highly adaptable for integration into switchboards, motor control centers (MCCs), and distribution panels. The series also supports front or rear connection options, enhancing installation flexibility in confined spaces.
E3 series MCCBs are primarily deployed in low-voltage power distribution systems within industrial plants, commercial buildings, data centers, and infrastructure projects. They are ideal for protecting feeders, transformers, motors, and capacitor banks against overloads and short circuits. Common installation environments include main distribution boards (MDBs), sub-distribution boards (SDBs), and generator paralleling switchgear. The electronic trip units enable precise coordination with downstream protective devices, minimizing nuisance tripping while ensuring selective coordination in critical processes. Additionally, the E3 series is suitable for applications requiring high short-circuit withstand capability, such as in heavy machinery, mining operations, and renewable energy systems (e.g., solar inverters and wind turbine converters).
The E3 series encompasses several subcategories based on frame size and breaking capacity, including the E3-100, E3-250, E3-630, E3-1250, and E3-1600 models. The article code structure typically follows the pattern: E3-[Frame Size][Poles][Trip Unit Type][Accessories]. For example, E3-250-3P-LSI indicates a 250A frame, 3-pole breaker with LSI (Long-Time, Short-Time, Instantaneous) electronic trip unit. Key articles include E3-100-3P-25kA, E3-630-4P-65kA, and E3-1250-3P-50kA. These breakers are available with fixed or draw-out mounting options, and accessories like mechanical interlocks, padlock devices, and door interlock kits are also offered. The series is compliant with IEC 60947-2 and UL 489 standards, ensuring global acceptance.
Partnering with Electric Automation Network for your E3 series MCCB needs ensures access to competitive pricing with up to 65% discount, real-time stock availability, and express worldwide shipping. Our team of specialized electrical engineers provides personalized technical support for product selection, coordination studies, and installation guidance. Each article includes detailed technical documentation, including datasheets, wiring diagrams, and certification files. Whether you require a single unit for a retrofit or bulk quantities for a large-scale project, we guarantee fast delivery and expert assistance to optimize your power distribution system.
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