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Product Overview
Managing complex three-phase power loads up to 40kW requires more than just standard short-circuit protection; it demands rigorous earth-fault mitigation. The CHNAILE High-Capacity 4-Pole Residual Current Breaker with Overcurrent Protection (RCBO) is a heavy-duty, integrated safety device built for commercial AC 400V environments. By accommodating massive 63-Ampere currents across four synchronized poles (3-Phase + Neutral), it guarantees absolute electrical isolation during maintenance. Featuring a specialized 50mA leakage threshold, this breaker expertly balances strict human/equipment safety with continuous operational stability, making it indispensable for EPC contractors outfitting high-demand commercial infrastructure.
Technical Parameters
Device Category: | AC RCBO (Integrated Leakage & Overcurrent Breaker) |
|---|---|
Poles Configuration: | 3P+N (Simultaneous 4-Pole Disconnect) |
Rated Current (In): | 63A (Maximum heavy-duty capacity) |
Rated Operating Voltage (Ue): | AC 400V |
Rated Frequency: | 50Hz |
Short-Circuit Breaking Capacity (Icu): | 6000A (6kA) |
Earth Leakage Sensitivity (I∆n): | 50mA (Optimized to prevent nuisance tripping in heavy machinery) |
Leakage Tripping Time: | ≤ 0.1s |
Installation: | 35mm Standard DIN-Rail Snap-on |
Standard Compliance: | GB/T 16917.1 (CCC Certified) |
1. Advanced 3-Phase Integrated Defense
Commercial-Grade Leakage Detection (50mA): The internal smart-core constantly monitors the 3-phase vector sum. The 50mA sensitivity is intentionally calibrated for large commercial equipment, providing excellent protection against electrical fires and indirect contact shocks, without tripping unnecessarily due to the inherent minor leakage of large motors.
Complete 4-Pole Isolation: During an overcurrent or ground fault, the synchronized mechanism severs L1, L2, L3, and the Neutral line at the exact same millisecond. This eliminates deadly phantom voltages from the neutral return, protecting site workers.
Massive Arc-Fault Neutralization: Employs four independent, heavy-duty arc chutes to instantly cool and extinguish explosive 6000A short-circuit flashes, preserving the integrity of the main distribution panel.
2. Heavy-Duty Commercial Build Quality
High-Density Thermal Casing: Housed in an oversized, flame-retardant V0 polymer enclosure. The robust architecture is specifically designed to safely dissipate the intense heat generated by routing 63 Amps across four parallel circuits.
Maximum Copper Mass: Internal current pathways and heavy-torque binding screws are forged from premium, oversized copper. This drastically reduces electrical resistance, ensuring secure connections for thick 3-phase industrial cables.
Routine Safety Verification: Features a prominent yellow 'T' (Test) button, allowing facility engineers to quickly simulate an earth fault and verify the mechanical health of the leakage circuit without external testing equipment.
3. Target Application Scenarios
Due to its massive 63A capacity, 4-pole isolation, and 50mA anti-nuisance leakage threshold, this RCBO is mandated for:
Commercial EV Charging Stations: Acting as the primary incoming protection for multi-point AC fast-charging pillars, safeguarding expensive vehicles and users from ground faults.
Construction Site Temporary Power: The essential main disconnect switch for temporary distribution boxes (spider boxes), ensuring regulatory compliance and worker safety in wet, outdoor environments.
Industrial Automation & Motor Centers: Protecting heavy 3-phase industrial pumps, compressors, and manufacturing lines where complete phase and neutral disconnection is required.
Commercial HVAC Plants: Supplying isolated, leakage-protected power to large-scale rooftop chillers and centralized heating systems.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct EPC Pricing: Bypass distribution networks. Sourcing high-capacity switchgear directly from our manufacturing floor dramatically reduces your project's Bill of Materials (BOM) costs.
Rigorous Tripping Calibration: Every 4-pole RCBO undergoes exhaustive automated testing. We meticulously calibrate the thermal, magnetic, and 50mA leakage coils to ensure 100% synchronized tripping accuracy prior to export.
Comprehensive OEM & Branding: We provide scalable OEM/ODM solutions, including bespoke color-coding, custom housing prints, and specialized packaging tailored for international electrical distributors.
