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Product Overview
As industrial facilities scale up and solar farms push into the megawatt range, the potential short-circuit currents on main feeder lines can reach terrifying levels. Mechanical circuit breakers often struggle to match the pure, current-limiting speed of a physical fuse at 120,000 Amps. The CHNAILE Heavy-Duty High Rupturing Capacity (HRC) Blade Fuse provides absolute fault decoupling. Built to the massive NH2 physical footprint, this 'gG' class component carries 400 Amperes of continuous AC power (exceeding 270kW). By instantly vaporizing its internal elements during a severe fault, it isolates downstream capital-intensive equipment like central solar inverters and factory mainlines from total devastation.
Technical Parameters
Device Category: | High Rupturing Capacity (HRC) Blade Fuse Link |
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Size Designation: | NH2 (Large footprint for massive thermal dissipation) |
Utilization Category: | gG (Full-range protection for general networks and cables) |
Rated Current (In): | 400A (Engineered for megawatt-scale power routing) |
Rated Operating Voltage (Ue): | AC 500V / AC 690V |
Rated Breaking Capacity (I1): | 120kA (at 500V) / 50kA (at 690V) |
Body Material: | High-Strength Steatite Ceramic |
Arc-Quenching Medium: | Granulated, Chemically-Treated Quartz Sand |
Standard Compliance: | IEC/HD 60269-2, CE, CB Certified |
1. Extreme Grid-Tie Fault Eradication
120kA Plasma Vitrification: A short circuit on a 400A main feeder generates explosive energy. The precisely calibrated multi-element silver/copper internal strips are designed to melt in fractions of a millisecond. The ensuing high-voltage plasma is violently absorbed by the densely packed quartz sand, turning the sand into non-conductive glass (fulgurite) and securely extinguishing 120kA faults before they can breach the switchboard.
400A Continuous Thermal Endurance: Transmitting 400 Amps continuously generates significant heat. The massive NH2 sizing provides the necessary surface area and volume to dissipate this thermal load efficiently, preventing nuisance blow-outs during peak summer loads in unventilated solar combiner boxes or heavy factory environments.
Instant Blown-Fuse Indicator: To minimize downtime in expansive facilities, the front faceplate features a mechanical red indicator dot. The exact moment the fuse clears a fault, the red pin ejects, providing immediate visual confirmation for maintenance crews performing emergency replacements.
2. Premium Metallurgical Construction
Thermal-Shock Immune Steatite Body: The main square enclosure is forged from ultra-high-density steatite ceramic. This specialized dielectric material is completely immune to the violent thermal and acoustic shockwaves generated when a 120,000A fault is isolated internally.
Oversized Silver-Plated Blades: Routing 400 Amps requires massive surface contact. The thick, knife-style connection blades are forged from high-conductivity copper and heavily silver-plated to prevent atmospheric oxidation. This guarantees ultra-low contact resistance and prevents dangerous heat buildup within the NH2 fuse base.
3. Target Application Scenarios
Because of its immense 400A capacity and 120kA current-limiting speed, this NH2 gG fuse is strictly specified by global EPCs for:
Megawatt Solar Inverter AC Outputs: Serving as the mandatory, fail-safe isolation layer between large-scale commercial solar inverters and the municipal utility grid (Grid-Tie Protection).
Heavy Manufacturing Main Feeders: The primary protective component inside main low-voltage distribution boards (MDB) feeding automotive assembly lines and large metallurgical plants.
Commercial High-Rise Distribution: Providing cost-effective, high-capacity incoming protection for individual floor risers in towering commercial skyscrapers.
Heavy-Duty Capacitor Banks: Safeguarding massive industrial power factor correction (PFC) equipment from severe switching surges and short circuits.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct Infrastructure Consumables: HRC fuses are vital, high-volume consumables for national grids and solar developers. Sourcing bulk NH2 fuses directly from our manufacturing lines slashes your operational OPEX and distribution margins.
Exhaustive IEC 60269-2 Verification: We do not gamble with catastrophic grid faults. Every batch of ceramic fuses undergoes severe thermal cycling, precise time-current curve validation, and actual high-voltage short-circuit destructive testing in our labs to guarantee 100% CB-certified reliability.
Scalable OEM Solutions: We actively support global electrical distribution brands and renewable energy EPCs, offering customized laser-pad printing on the ceramic body and heavy-duty bulk packaging tailored for international transport.
