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Product Overview
In premium commercial developments and automated infrastructures, a localized electrical fault must never trip the main breaker and shut down the entire facility. The CHNAILE Intelligent 3-Pole Electronic MCCB is explicitly designed to solve this engineering challenge. By integrating a highly sensitive microprocessor directly into the robust 250A framework, this device offers total control over overload and short-circuit parameters. Certified to rigorous IEC 60947-2 industrial standards, it provides unparalleled accuracy, immunity to ambient temperature fluctuations, and real-time LED diagnostics, ensuring your high-value infrastructure operates with absolute safety and intelligent precision.
Technical Parameters
Device Category: | Electronic Molded Case Circuit Breaker (Smart MCCB) |
|---|---|
Poles Configuration: | 3P (3-Phase Intelligent Load Control) |
Rated Current (In): | 250A (Heavy-duty continuous capacity) |
Trip Unit Technology: | Solid-State / Microprocessor-Controlled |
Protection Adjustability: | Multi-dial adjustable (Long-delay, Short-delay, Instantaneous) |
Rated Operating Voltage (Ue): | AC 400V |
Ultimate Short-Circuit Breaking Capacity (Icu): | 50kA (Top-tier plasma suppression) |
Diagnostic Interface: | Integrated LED Status & Pre-Alarm Indicators |
Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Advanced Microprocessor-Driven Protection
Flawless Selective Coordination: The electronic trip dials allow engineers to precisely shape the tripping curve. By adjusting the short-time delay, this 250A main breaker will hold steady during a downstream fault, allowing the smaller sub-breaker to trip first. This isolates the problem locally and keeps the rest of the building powered.
Ambient Temperature Immunity: Unlike mechanical bi-metallic strips that trip early in hot electrical rooms, the digital microprocessor relies on exact current sampling. A 250A load remains perfectly stable whether the ambient temperature is 10°C or 50°C.
Proactive LED Diagnostics: Equipped with an intuitive frontal LED interface. Facility managers are provided with real-time visual alerts (such as pre-alarm for approaching overloads) long before a critical trip occurs, enabling proactive load shedding and planned maintenance.
2. Premium Industrial Architecture
Tamper-Proof Calibration Shield: The sensitive electronic adjustment DIP switches are secured beneath a transparent polycarbonate cover. This critical feature prevents unauthorized personnel from altering the calibrated safety thresholds in complex commercial panels.
High-Density Thermosetting Shell: Molded from premium, V0-rated polymers designed for climate-controlled indoor MDBs. It safely absorbs the massive acoustic and thermal shockwaves generated when extinguishing 50,000A fault plasmas in milliseconds.
Oversized Low-Resistance Terminals: Engineered with massive internal copper conductors and heavy-duty hex-bolt connections to manage the immense 250A continuous 3-phase draw without generating dangerous terminal heat.
3. Target Application Scenarios
Due to its sophisticated electronic adjustability and massive 250A capacity, this MCCB is strictly specified by top-tier electrical designers for indoor, high-compliance environments:
Commercial High-Rises & Skyscrapers: Serving as the intelligent main incomer for floor-by-floor distribution panels, guaranteeing rigorous selective coordination to prevent total building blackouts.
Centralized Chiller Plants: Providing highly tuned, delayed-trip protection for the massive 3-phase compressor motors used in commercial HVAC systems, easily tolerating prolonged startup inrush currents.
Automotive Manufacturing Lines: Acting as the stable main disconnect for heavy robotic welding arrays where extreme load fluctuations would cause standard thermal breakers to trip falsely.
Large-Scale Enterprise Data Centers: Supplying tightly monitored, temperature-immune power distribution to critical server room UPS infrastructure.
4. Global B2B Partnership with CHNAILE Factory
Direct Supply of Intelligent Switchgear: Sourcing advanced microprocessor-controlled MCCBs directly from our manufacturing hub eliminates immense trader markups, giving your EPC firm a decisive advantage in bidding for premium architectural projects.
Rigorous Digital Calibration: We leave nothing to chance. Every electronic trip unit undergoes exhaustive automated testing to verify 100% tripping accuracy across all adjustable dial settings before IEC 60947-2 certification is finalized.
Premium OEM Panel Builder Support: We partner with the world's most demanding system integrators, offering bespoke labeling, customized factory-preset calibration, and scalable manufacturing tailored to your smart-building solutions.
250A Electronic Molded Case Circuit Breaker Instruction Manual
