Nale Electric is willing to work together with domestic and foreign merchants to create brilliance!
| Quantity: | |
Product Overview
When hoisting a 200-ton cargo container or powering ventilation shafts deep within a mountain tunnel, electrical reliability is a matter of life and death. The CHNAILE Heavy-Duty 3-Pole Thermal-Magnetic MCCB is engineered as a brute-force industrial fortress. Designed to command up to 800 Amperes of continuous AC 400V power, this breaker eschews fragile microprocessors in favor of battle-tested physical bimetals and electromagnetic coils. It effortlessly sustains the colossal loads of 500kW industrial infrastructure while standing ready to instantly vaporize devastating 65,000A (65kA) short-circuit faults. Encased in a ruggedized, vibration-proof polymer shell, it provides EPC contractors with a fail-safe main power gateway for the world's most unforgiving job sites.
Technical Parameters
| Device Category: | Thermal-Magnetic Molded Case Circuit Breaker (TM MCCB) |
| Poles Configuration: | 3P (Simultaneous 3-Phase Heavy Motor Isolation) |
| Frame Size & Rated Current (In): | 800A (Sustains massive continuous loads up to ~500kW) |
| Rated Operating Voltage (Ue): | AC 400V (50Hz) |
| Rated Insulation Voltage (Ui): | 800V |
| Rated Impulse Withstand Voltage (Uimp): | 8kV (Superior transient surge immunity) |
| Ultimate Breaking Capacity (Icu): | 65kA (L-Type high-capacity fault suppression) |
| Service Breaking Capacity (Ics): | 50kA (Sustained heavy-duty reliability) |
| Instantaneous Magnetic Trip (Ii): | 10In ± 20% (Calibrated at 8000A for extreme inrush) |
| Arc Distance: | ≤ 100mm |
| Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Indestructible Thermal-Magnetic Defense
8000A Motor Startup Immunity (10In): Starting the massive winch motors of a shipyard crane draws a terrifying, temporary magnetic spike. The internal fixed electromagnetic trip unit is expertly calibrated to trigger only at 10 times the nominal current (8000 Amps). This ensures the breaker ignores these safe, monumental starting surges, guaranteeing smooth heavy-lift operations without frustrating nuisance trips.
65kA Catastrophic Arc Vaporization: When a genuine short circuit occurs on a 500kW main feed, the energy is explosive. The immense magnetic field forcibly triggers the Category A instantaneous latch. The resulting 65kA plasma arc is violently drawn into dense, multi-tiered metallic splitter grids, fragmenting and neutralizing the threat in fractions of a millisecond to prevent panel meltdowns.
Inverse-Time Overload Protection: Relying on pure physics, the oversized internal bi-metallic strips bend predictably based on the exact heat generated by the 800A current. It provides a safe, inverse-time delay for minor, temporary overworks, but permanently severs the circuit if a sustained, cable-melting overload occurs.
2. Ruggedized Environmental Architecture
Vibration & Dust Resilient Chassis: Electronic breakers often suffer from cracked PCB solder joints under heavy mechanical resonance. This TM MCCB features a fully bolted, mechanically interlocked architecture that defies the relentless pounding of nearby diesel generators, rock crushers, and the intense vibrations of tunnel boring environments.
8kV Atmospheric Surge Firewall: Industrial and maritime parks are prone to severe power grid fluctuations. The impressive 800V dielectric insulation and 8kV Uimp rating act as a heavy-duty firewall, preventing internal flashovers from grid switching transients and localized lightning strikes.
Mechanical Safety Verification: Features a prominent red 'Push to Trip' mechanical diagnostic button. This allows maintenance teams working in heavily soiled or vibrating environments to manually trigger and verify the absolute health of the internal spring-latch mechanism before authorizing live operations.
3. Target Application Scenarios
Because of its foolproof thermal-magnetic design and crucial 10In motor-starting profile, this 800A MCCB is strictly specified by heavy-industry EPCs for:
Shipyard & Port Equipment: Serving as the ultra-reliable, moisture-proof main starter for massive 3-phase gantry cranes, cargo winches, and shore-power rectifiers.
Subterranean Tunneling Infrastructure: Acting as the primary power gateway for immense underground ventilation fans, dewatering pumps, and boring machine auxiliary boards.
Heavy Metallurgical Plants: Providing resilient, vibration-proof power isolation for heavy-duty steel rolling mills and industrial induction furnaces.
Large-Scale Quarrying & Mining: Supplying safe, high-inrush tolerant power to centralized stone-crushing matrices and multi-kilometer conveyor systems.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct Industrial Procurement: Eliminate intermediary trading margins on essential heavy-duty components. Sourcing these massive 800A thermal-magnetic MCCBs directly from our automated lines drastically optimizes the BOM for your shipyard and mining construction projects.
Exhaustive IEC 60947-2 Calibration: Mechanical reliability is non-negotiable at 800 Amps. Every unit undergoes rigorous thermal-bath calibration to verify the exact inverse-time curve, alongside 65kA short-circuit blasts, ensuring flawless physical performance prior to global export.
OEM Integration for Switchboard Builders: We actively partner with global motor control center (MCC) manufacturers, providing customized laser-engraved faceplates, specifically tailored phase barriers, and bespoke heavy-duty packaging to elevate your industrial brand.
