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Product Overview
In heavy industrial grids and municipal distribution networks, massive short-circuit potentials demand a primary line of defense that simply cannot fail. The CHNAILE Heavy-Duty High Rupturing Capacity (HRC) Blade Fuse Link provides absolute, physical fault decoupling. Unlike mechanical circuit breakers that rely on moving parts and complex trip units, this NH-type fuse utilizes pure physics. Rated for 250 Amperes of continuous load, its 'gG' utilization category ensures full-range protection against both creeping overloads and explosive short circuits. Capable of safely extinguishing a terrifying 120kA fault current, this CE and CB certified ceramic fuse guarantees that your most expensive transformers and switchgear infrastructure survive the absolute worst-case grid scenarios.
Technical Parameters
Device Category: | High Rupturing Capacity (HRC) Blade Fuse Link |
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Size Code: | NH1 (Universal standard footprint) |
Utilization Category: | gG (General purpose cable and line protection) |
Rated Current (In): | 250A (Heavy industrial capacity) |
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: | High-Purity Silica Quartz Sand |
Standard Compliance: | IEC/HD 60269-2, CE, CB Certified |
1. Absolute Fail-Safe Protection Mechanisms
120kA Extreme Current Limitation: In a severe short circuit, the massive prospective fault current is cut off before it can reach its destructive peak. The precision-engineered internal fusible elements vaporize instantly, forcing the 120,000A arc into the surrounding quartz sand, turning it into non-conductive glass (fulgurite) in milliseconds.
Zero-Maintenance Reliability: With absolutely no mechanical springs, latches, or electronic microprocessors to degrade or seize up over time, this HRC fuse offers 100% predictable, maintenance-free performance in the harshest industrial conditions.
Instant Blown-Fuse Indicator: Features a highly visible red mechanical indicator button on the front face plate. The moment the internal element melts, the red pin forcefully ejects, allowing maintenance technicians to instantly identify the blown phase in a dark, multi-fuse distribution panel.
2. Premium Metallurgical & Ceramic Construction
Thermal-Shock Proof Steatite Body: The main square enclosure is crafted from ultra-high-density steatite ceramic. This specialized material boasts extraordinary dielectric strength and is completely immune to the violent thermal and acoustic shockwaves generated during a 120kA plasma explosion.
Silver-Plated Copper Blade Contacts: The robust, knife-style connection blades are forged from high-conductivity copper and thickly plated with anti-corrosive silver. This ensures maximum clamping surface area within the fuse base, guaranteeing ultra-low contact resistance and extremely cool operation under continuous 250A loads.
Chemically Treated Quartz Sand: The interior is densely packed with chemically treated, high-purity silica sand that acts as an unparalleled heat sink and arc-quenching medium, preventing the fuse casing from exploding under extreme fault pressures.
3. Target Application Scenarios
Because of its immense 120kA breaking capacity and foolproof physical isolation, this NH1 gG fuse is strictly specified by global EPCs and grid operators for:
Transformer Substations: Serving as the primary low-voltage side disconnect and short-circuit protection immediately downstream from massive municipal grid transformers.
Feeder Pillars & Distribution Cabinets: The industry-standard protective component inside street-side feeder pillars, managing high-amperage underground cable distribution networks.
Heavy Industrial Main Switchboards (MDB): Acting as the cost-effective, high-capacity incoming protection for heavy manufacturing plants and metallurgical foundries.
Motor Control Centers (MCC) Backup: Providing essential backup short-circuit protection ahead of large motor contactors and variable frequency drives (VFDs) in industrial water treatment plants.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct Infrastructure Supply: Eliminate multi-tier distribution markups. Sourcing bulk HRC fuses and their corresponding bases directly from our manufacturing floor drastically optimizes the consumable BOM for your major utility and infrastructure maintenance contracts.
Exhaustive IEC 60269-2 Testing: We do not gamble with destructive fault currents. Every batch of ceramic fuses undergoes severe thermal cycling, precise time-current curve validation, and actual high-voltage short-circuit destructive testing to guarantee 100% reliability.
Scalable OEM/ODM Solutions: We actively support global electrical distribution brands, offering customized laser-pad printing, specific amperage tuning, and heavy-duty bulk packaging tailored to international utility providers.
