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Product Overview
In subterranean tunnel megaprojects and offshore deep-sea drilling, standard 400V power grids suffer from crippling voltage drops across kilometers of heavy cabling. Upgrading the network to AC 1140V is the only engineering solution—but it requires switchgear that can survive terrifying high-voltage arc flashes. The CHNAILE Ultra-High Voltage 3-Pole Molded Case Circuit Breaker (MCCB) is constructed as an impenetrable firewall against these extremes. Calibrated for a massive 315-Ampere continuous payload, it acts as the primary isolator for AC 1140V architectures. Boasting a staggering 1150V dielectric insulation strength and a 12kV atmospheric surge resilience, this heavy-duty switchgear ensures your most capital-intensive tunneling and maritime machinery operates with zero-failure reliability.
Technical Parameters
Device Category: | Ultra-High Voltage AC Molded Case Circuit Breaker (MCCB) |
|---|---|
Poles Configuration: | 3P (Simultaneous 3-Phase Extreme Voltage Isolation) |
Rated Current (In): | 315A (Engineered for massive 600kW+ inductive motors) |
Rated Operating Voltage (Ue): | AC 800V / 1000V / 1140V |
Rated Insulation Voltage (Ui): | 1150V (Apex-tier dielectric firewall) |
Rated Impulse Withstand Voltage (Uimp): | 12kV (Extreme transient surge immunity) |
Ultimate Breaking Capacity (Icu): | 36.5kA (at 800V) / 15kA (at 1140V) |
Service Breaking Capacity (Ics): | 100% Icu at 1140V (Sustained operational integrity) |
Standard Compliance: | GB/T 14048.2 |
1. Elite Mega-Infrastructure Protection Mechanisms
1140V Catastrophic Arc Vaporization: Interrupting a 315A fault at 1140 Volts produces explosive plasma. This MCCB utilizes oversized, multi-grid de-ion arc chutes paired with aggressive magnetic blowouts. It violently stretches and extinguishes high-voltage short-circuit arcs in milliseconds, preventing catastrophic structural fires inside confined tunnel substations.
Extreme Cable Run Thermal Tolerance: The massively upscaled bi-metallic elements are designed to effortlessly sustain 315A continuous loads. This perfectly accommodates the prolonged, heavy inrush currents generated when activating the massive cutterhead motors of Tunnel Boring Machines (TBMs).
Mechanical Linkage Audit (Red 'Push to Trip'): Features a prominent red diagnostic button. In highly vibrating and damp environments like offshore platforms, this allows structural engineers to physically verify the health of the heavy-duty tripping mechanism before authorizing live operations.
2. Fortified Maritime & Subterranean Architecture
1150V Dielectric Thermosetting Armor: Housed in a structurally reinforced, anti-tracking V0 polymer block. The extraordinary Ui 1150V and Uimp 12kV ratings act as an impenetrable dielectric shield, preventing internal flashovers caused by severe humidity in marine environments or grid-switching transients.
Oversized Silver-Alloy Terminations: To safely route 315 Amps of extreme-voltage power, the internal contact pads are massively upscaled and plated with industrial silver-tungsten. This dramatically minimizes AC resistance and eliminates the risk of contact welding during high-load mechanical tunneling.
Vibration-Proof Structural Integrity: The internal trip mechanisms and bolted chassis are heavily reinforced to resist severe mechanical resonance, ensuring the contacts remain firmly locked even when installed next to thumping shipboard diesel generators.
3. Target Application Scenarios
Because of its extremely rare AC 1140V rating and massive 315A footprint, this heavy-duty MCCB is exclusively mandated by leading EPCs for:
Tunnel Boring Megaprojects (TBMs): Serving as the main incoming high-voltage isolator inside the cramped, highly-vibrating control cabins of subterranean shield machines.
Offshore Oil & Gas Platforms: Providing resilient, high-capacity 3-phase isolation for massive deep-sea pumping stations and maritime drilling equipment.
Heavy Shipboard Distribution: Managing the ultra-high voltage requirements of large commercial vessel thrusters and heavy cargo winches to minimize line losses.
Large-Scale Quarrying & Crushing: Acting as the primary power switch for heavy rock crushers and kilometers-long overland conveyor belt systems.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct EPC Procurement: Sourcing ultra-high-voltage AC switchgear directly from our manufacturing floor eliminates massive international trading margins, providing your engineering firm with a devastating financial advantage in global infrastructure bids.
Exhaustive 1140V Verification: We do not gamble with extreme voltage. Every 315A unit is subjected to severe thermal imaging, simulated 1140V short-circuit blasts, and 12kV impulse testing to guarantee absolute GB/T 14048.2 compliance before dispatch.
Premium OEM Panel Builder Solutions: Leveraging our expansive manufacturing footprint, we offer tailored OEM solutions—including custom laser-engraved faceplates and bespoke heavy-duty packaging—allowing elite system integrators to scale their brand effortlessly.
