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Product Overview
In widespread municipal infrastructures—such as kilometers of smart street lighting or remote storm-water drainage stations—transient faults caused by lightning strikes or momentary moisture are inevitable. Standard breakers trip and leave the public in the dark until a crew arrives. The CHNAILE Intelligent 3P+N Auto-Reclosing Molded Case Circuit Breaker (Smart ARD MCCB) gives your power grid the ability to "Self-Heal." By combining an ultra-rugged 65kA physical chassis with an advanced LCD microprocessor, this device automatically restores power after verifying the fault was temporary. Delivering precise digital calibration for both overload (50-125A) and earth leakage (30mA-1000mA), it ensures uninterrupted public services while enforcing flawless Category B network selectivity.
Technical Parameters
Device Category: | Smart Auto-Reclosing Earth Leakage MCCB (ARD) |
Poles Configuration: | 3P+N (Optimized for mixed 3-phase and single-phase municipal loads) |
Digital Rated Current (In): | Adjustable 50A to 125A (via LCD Keypad) |
Digital Earth Leakage (I∆n): | Adjustable 30mA to 1000mA (from life-safety to fire-protection) |
Rated Operating Voltage (Ue): | AC 400V (50Hz) |
Ultimate Breaking Capacity (Icu): | 65kA (Extreme open-air plasma suppression) |
Short-Time Withstand (Icw): | 10kA for 1s (Category B Elite Selectivity) |
Auto-Reclosure Delay: | Adjustable 20s to 60s |
Operator Interface: | High-Contrast LCD Screen with Tactile Membrane Keypad |
Standard Compliance: | GB/T 14048.2 (CCC Certified) |
1. Autonomous "Self-Healing" Grid Technology
Motorized Transient Recovery: When a severe thunderstorm induces a temporary ground fault in a street lighting array, the breaker trips to protect the circuit. The internal microprocessor then initiates an automated countdown (20s-60s). If the grid normalizes, the heavy-duty motor aggressively re-engages the contacts, restoring city power automatically. If a permanent short circuit is detected, the system safely locks out.
Surgical LCD Calibration Matrix: Utilizing the intuitive front-facing LCD and directional keypad, electrical contractors can digitally sculpt the exact protection profile on-site. The current (In) can be tuned anywhere from 50A to 125A, while the leakage threshold can be set to 30mA for public-facing wet zones, or 1000mA to prevent nuisance tripping on heavy, long-run submersible pump cables.
Category B Selective Coordination: A localized short in one pump shouldn't shut down the entire storm-water station. With a robust 10kA/1s short-time withstand rating, this main incomer safely delays its trip, allowing the downstream sub-breaker to clear the localized fault while the rest of the facility keeps pumping.
2. Ruggedized Municipal Architecture
3P+N Mixed-Load Optimization: Municipal enclosures typically feed a mix of 3-phase heavy motors and single-phase control electronics. The 3P+N architecture ensures complete phase and neutral isolation during a fault, preventing dangerous neutral-return voltages from frying sensitive smart-city sensors.
65kA Catastrophic Arc Vaporization: Armed with aggressively oversized magnetic blow-out coils and expansive de-ion arc chutes, this MCCB instantly fragments and extinguishes violent 65,000-Ampere short-circuit plasmas, protecting the structural integrity of the public distribution board.
Manual Override & Safety Lockout: In addition to the LCD controls, the unit features prominent physical buttons (Red for Trip, Green for Close) and an isolation lock. This guarantees absolute Lock-Out/Tag-Out (LOTO) safety for municipal workers during hands-on maintenance.
3. Target Application Scenarios
Because of its autonomous power recovery, broad digital adjustability, and 3P+N design, this Smart ARD MCCB is exclusively mandated by municipal EPCs for:
Smart City Lighting Networks: Acting as the self-healing main power hub for municipal street lighting grids and automated traffic control intersections.
Unmanned Flood Control Stations: Providing autonomous electrical oversight and nuisance-trip immunity for deep-well submersible pumps during severe weather events.
Remote Telemetry & Weather Stations: Ensuring continuous power for isolated data-gathering equipment where human maintenance access is restricted by geography.
Agricultural Irrigation Microgrids: Serving as the intelligent, remote-ready main disconnect for massive center-pivot irrigation systems spread across hectares of farmland.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct Public Infrastructure Supply: Sourcing intelligent, motorized switchgear directly from our R&D and manufacturing facility gives your system integration firm a profound pricing edge in lucrative government and municipal utility tenders.
Exhaustive Automated QA Testing: The complexity of auto-reclosing logic requires absolute perfection. Every single LCD unit undergoes exhaustive automated leakage simulations, motorized endurance testing, and 65kA short-circuit blasts before leaving our smart factory.
OEM/ODM for Utility Providers: We offer comprehensive white-labeling solutions, custom software parameter pre-sets, and bespoke communication module integrations tailored specifically for national grid operators and smart-city developers.
