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Product Overview
In specialized mega-infrastructures like offshore wind farms and deep coal mines, utilizing standard 400V networks results in crippling power losses across kilometers of heavy cabling. Upgrading to AC 1140V mitigates this, but extinguishing an 1140V 4000-Ampere arc flash requires switchgear of legendary resilience. The CHNAILE Ultra-High Voltage 3-Pole Air Circuit Breaker (ACB) is the apex predator of low-voltage protection. Built upon a massive drawout cradle and governed by a digital microprocessor, it offers unparalleled LSIG fault coordination at extreme voltages. Boasting an industry-peaking 1300V dielectric insulation strength, it secures multi-million-dollar renewable energy assets against catastrophic grid events.
Technical Parameters
| Device Category: | Ultra-High Voltage Air Circuit Breaker (Universal Breaker) |
| Poles Configuration: | 3P (Simultaneous 3-Phase Megawatt Isolation) |
| Rated Frame Current (Inm): | 4000A (Supports mega-scale inductive loads) |
| Rated Operating Voltage (Ue): | AC 800V / 1000V / 1140V (Extreme AC distribution) |
| Rated Insulation Voltage (Ui): | 1300V (Apex-tier dielectric firewall) |
| Rated Impulse Withstand Voltage (Uimp): | 12kV (Maximum lightning & grid surge immunity) |
| Control Core: | Intelligent Microprocessor Trip Unit with LED/LCD Display |
| Installation Architecture: | Drawout / Withdrawable Type (Cradle mounted) |
| Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Microprocessor-Driven 1140V Protection
Extreme Voltage Arc Vaporization: Interrupting a fault at AC 1140V produces a violently expansive plasma arc. This ACB employs colossal open-air arc chutes engineered to aggressively fragment, stretch, and safely exhaust high-voltage plasmas away from the switchgear cabinet in milliseconds.
Surgical LSIG Coordination: The integrated intelligent controller allows facility engineers to digitally sculpt precise Long-time, Short-time, Instantaneous, and Ground-fault (LSIG) curves. This guarantees that temporary high-inrush currents from massive wind generators won't cause frustrating nuisance trips.
Real-Time Grid Diagnostics: The onboard digital interface continuously analyzes phase currents and system health, empowering remote operators with crucial predictive maintenance data before deploying expensive offshore service teams.
2. Colossal Structural & Drawout Engineering
1300V Dielectric Thermosetting Armor: Housed within a structurally reinforced casing boasting a terrifying Ui 1300V rating. This acts as an impenetrable dielectric shield, preventing internal flashovers even during violent 12kV lightning strikes on towering wind turbine blades.
3-Position Drawout Mechanism: At 4000 Amps, unbolting cables is dangerously impractical. This breaker sits on a heavy-duty racking cradle. Using a hand crank, technicians can safely transition the massive breaker between 'Connected', 'Test', and 'Disconnected' positions, drastically reducing maintenance downtime.
Massive Silver-Plated Busbars: The rear connections feature gigantic, high-purity copper blocks heavily plated with silver. This guarantees near-zero electrical resistance and monumental thermal dissipation while routing 4000 Amps of 1140V continuous power.
3. Target Application Scenarios
Because of its incredibly rare AC 1140V rating and massive 4000A footprint, this ACB is explicitly mandated by global EPCs for:
Offshore Wind Farms: Acting as the critical main synchronization and disconnect switch located in the base or nacelle of megawatt-class wind turbines.
Deep Underground Mining: Serving as the mandatory ultra-high-voltage main incomer for explosion-proof mobile substations and heavy shearer loaders deep within mineral mines.
Heavy Maritime & Oil Rigs: Providing robust, vibration-resistant power distribution for 1000V+ specialized drilling thruster systems and offshore pumping platforms.
Mega-Scale Pumping Stations: Managing the ultra-high voltage requirements of massive municipal or agricultural deep-well irrigation pumps to minimize transmission line losses.
4. Global B2B Partnership with CHNAILE Factory
Direct Supply for Mega-Projects: Sourcing ultra-high-voltage ACB switchgear directly from our manufacturing floor eliminates massive international trader margins, providing your EPC firm a decisive financial advantage in global infrastructure bids.
Exhaustive 1140V FAT Verification: We do not gamble with extreme voltage. Every 4000A unit undergoes brutal thermal imaging, simulated ultra-high voltage short-circuit blasts, and 12kV impulse testing to guarantee absolute IEC compliance before dispatch.
OEM Integration for Switchboard Builders: We actively partner with elite panel builders worldwide, providing comprehensive technical racking support, customized motorized control voltages, and bespoke branding for your premium 1140V MDB cabinets.
