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Product Overview
When protecting multi-million-dollar clinical equipment or high-capacity EV charging networks, unexpected power loss is just as dangerous as a short circuit. The CHNAILE Intelligent 3-Pole Electronic MCCB bridges the gap between ultra-fast fault clearance and intelligent load monitoring. Unlike traditional bi-metallic breakers, this device utilizes a solid-state microprocessor equipped with True Root Mean Square (RMS) current sensors. This allows the breaker to perfectly "read" distorted, non-linear waveforms without nuisance tripping. Encased in a highly insulated 1000V dielectric shell and featuring a proactive LED diagnostic panel, this 125A Category A switchgear delivers instantaneous 50kA fault vaporization, providing unparalleled safety for the world's most sensitive electrical grids.
Technical Parameters
| Device Category: | Electronic Molded Case Circuit Breaker (Smart MCCB) |
| Poles Configuration: | 3P (Simultaneous 3-Phase Precision Control) |
| Adjustable Rated Current (Ir1): | 63A to 125A (Microprocessor controlled via front dial) |
| Rated Operating Voltage (Ue): | AC 400V (50Hz) |
| Rated Insulation Voltage (Ui): | 1000V (Exceptional dielectric strength) |
| Rated Impulse Withstand Voltage (Uimp): | 12kV (Extreme lightning & grid surge immunity) |
| Ultimate Breaking Capacity (Icu): | 50kA (M-Type High-Performance Arc Suppression) |
| Service Breaking Capacity (Ics): | 35kA |
| Selectivity Category: | Category A (Instantaneous ultra-fast fault clearance) |
| Diagnostic Interface: | 3-Stage LED Status Indicators (Run, Pre-Alarm, Overload) |
| Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Microprocessor-Driven Precision & Diagnostics
True RMS Harmonic Immunity: High-power rectifiers (like those in EV chargers) pollute the AC line with harmonic distortion. The internal digital sensor calculates the True RMS value of the current, completely ignoring safe harmonic spikes and ensuring the 125A threshold is perfectly respected without frustrating false shutdowns.
Proactive LED Pre-Alarm System: The front fascia incorporates an intelligent traffic-light LED array. Before a creeping overload triggers a hard shutdown, the amber 'Pre-Alarm' LED illuminates. This critical feature gives hospital facility managers or data center operators precious time to shed non-essential loads or safely spin down sensitive MRI machines before the power is forcibly cut.
Tamper-Proof Calibration Shield: The precision current setting dials (63A to 125A) are deeply recessed and protected by a transparent, sealable polycarbonate window. This ensures that unauthorized personnel cannot accidentally alter life-saving medical or IT power profiles.
2. Extreme Environmental & Fault Defense
Instant Category A Vaporization (50kA): Because precision equipment cannot tolerate prolonged voltage dips during a fault, this MCCB is rated Category A. The moment a catastrophic short circuit is detected, the electronic brain fires the magnetic latch instantly, driving the 50,000A plasma into compact arc chutes (Arc distance ≤ 50mm) for immediate neutralization.
12kV Atmospheric Surge Firewall: Commercial EV charging stations are often installed in exposed, outdoor parking lots. The staggering Ui 1000V insulation and 12kV Uimp rating act as a heavy-duty dielectric firewall, preventing lightning transients from jumping through the breaker and destroying expensive downstream vehicle rectifiers.
3. Target Application Scenarios
Due to its sophisticated True RMS sensing, proactive diagnostics, and extreme 12kV resilience, this 125A Electronic MCCB is strictly specified by global EPCs for:
Commercial EV Fast-Charging Hubs: Acting as the primary, harmonic-immune AC input disconnect for large-scale Level 3 DC supercharger rectification cabinets.
Medical Imaging & Clinical Grids: Providing surgically precise, pre-alarm equipped power protection for hospital MRI machines, CT scanners, and critical life-support sub-mains.
Enterprise UPS & Data Centers: Supplying tightly monitored, temperature-immune 3-phase power distribution to critical server room Uninterruptible Power Supplies.
Precision CNC Manufacturing: Serving as the stable main disconnect for heavy 5-axis machining centers where voltage drops or false trips would ruin expensive aerospace components.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct Smart Tech Supply: Sourcing advanced microprocessor-controlled MCCBs directly from our manufacturing hub eliminates immense trader markups, giving your engineering firm a decisive advantage in bidding for premium hospital and EV infrastructure projects.
Rigorous Digital Calibration: We leave nothing to chance. Every electronic trip unit undergoes exhaustive automated secondary injection testing to verify 100% tripping accuracy across the entire 63A to 125A spectrum, alongside 50kA short-circuit blasts prior to IEC certification.
Premium OEM Panel Builder Support: We partner with the world's most demanding system integrators, offering bespoke labeling, customized LED alert configurations, and scalable manufacturing tailored to your smart-building solutions.
Electronic Molded Case Circuit Breaker Instruction Manual.pdf
