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Product Overview
In heavy industrial zones and critical commercial facilities, a short circuit near the main power source can generate explosive fault currents exceeding 50,000 Amps. Standard MCCBs simply disintegrate under such force. The CHNAILE Heavy-Duty 3-Pole Molded Case Circuit Breaker is engineered to confront this exact peril. Rated for 125 Amperes of continuous heavy load, this H-Type series breaker is fortified to extinguish an incredible 65kA (65,000A) of short-circuit plasma. Housed in an anti-tracking thermosetting enclosure and equipped with a dedicated mechanical test mechanism, this IEC 60947-2 certified switchgear is the ultimate failsafe for steel mills, large-scale generator integrations, and heavy manufacturing infrastructures.
Technical Parameters
Device Category: | Heavy-Duty Industrial Circuit Breaker (MCCB) |
|---|---|
Poles Configuration: | 3P (Simultaneous 3-Phase Main Disconnect) |
Rated Current (In): | 125A (Continuous heavy-duty capacity) |
Rated Operating Voltage (Ue): | AC 400V (50Hz) |
Rated Insulation Voltage (Ui): | 800V |
Rated Impulse Withstand Voltage (Uimp): | 8kV (Grid-level lightning & surge resilience) |
Ultimate Breaking Capacity (Icu): | 65kA (H-Type Extreme Performance) |
Service Breaking Capacity (Ics): | 42kA |
Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Extreme Industrial Fault Mitigation
65kA Catastrophic Arc Eradication: Designed for installation close to high-capacity transformers where fault currents are highest. The aggressively oversized, multi-grid arc chutes violently stretch and suffocate 65kA fault plasmas in milliseconds, preventing structural panel meltdowns and secondary fires.
Heavy-Duty Thermal-Magnetic Core: The finely calibrated bimetallic elements sustain 125A of continuous current required by heavy industrial machinery, while the powerful magnetic trip coil reacts instantaneously to severe short-circuit spikes without nuisance tripping during massive motor startups.
Mechanical Linkage Audit (Blue 'T' Button): Heavy manufacturing environments are laden with airborne dust and metallic particulates. The dedicated blue 'T' (Test) button allows maintenance crews to safely trigger the trip mechanism, ensuring the internal mechanical linkage has not seized and is 100% operational.
2. Ruggedized Structural Engineering
Anti-Carbonization Thermosetting Armor: Molded from a specialized, high-density thermosetting polymer. This V0-rated casing is engineered to resist internal carbon tracking from recurring fault clearing, maintaining long-term dielectric integrity even in the sweltering heat of foundries.
Superior 8kV Surge Firewall: Fortified with 800V internal insulation and an 8kV Uimp rating, it shields expensive downstream industrial automation from severe lightning strikes and the violent voltage transients caused by switching massive inductive loads.
High-Torque Terminations: Features deep-set, heavy-duty bolt-on terminals. This allows engineers to apply extreme clamping torque to thick 3-phase industrial cables, ensuring a permanent, zero-gap connection that withstands the constant, severe vibrations of heavy generator engines.
3. Target Application Scenarios
Due to its colossal 65kA breaking capacity and robust 125A footprint, this MCCB is exclusively mandated by top-tier EPCs for:
Heavy Metallurgy & Steel Mills: Serving as the ultra-reliable main incomer for rolling mills, electric arc furnaces, and harsh foundry environments.
Large Commercial Backup Generators: Acting as the primary synchronization and protection switch between massive diesel generator sets and the facility's main distribution board.
Main Transformer Downstream Boards: Installed directly downstream of large distribution transformers where potential short-circuit fault currents are at their absolute peak.
Heavy Mining Excavators: Providing resilient, vibration-proof power isolation for the massive 3-phase electrical systems driving draglines and mining shovels.
4. Global B2B Partnership with CHNAILE Factory
Direct High-Ampere Procurement: Eliminate multi-tier distribution markups. Accessing our manufacturing lines directly provides you with aggressive wholesale pricing, drastically optimizing the BOM for your major industrial infrastructure projects.
Exhaustive IEC 60947-2 Verification: At 65kA, failure is not an option. Every single H-Type MCCB is subjected to severe thermal imaging, simulated 65,000A short-circuit blasts, and rigorous mechanical endurance testing prior to international shipment.
Custom OEM Solutions for Panel Builders: We cater specifically to global switchboard manufacturers, offering customized laser-engraved faceplates, bespoke packaging, and scalable manufacturing to support your brand's industrial expansion.
