12-Plate MCCB Arc Chute 3012055 DC01 Steel PA66-GF30 Molded Case Circuit Breaker Arc Extinguisher

Gas-Ablative Arc Extinguishing Chamber for Industrial MCCBs

In low-voltage industrial distribution and motor control centers, Molded Case Circuit Breakers (MCCBs) rely on rapid arc commutation to restrict let-through energy ($I^2t$) during severe short-circuit interruptions. The 3012055 MCCB Arc Chamber integrates active gas ablation with magnetic de-ion splitting to extinguish high-temperature arcs in milliseconds.

Engineered with a 12-plate de-ion grid array stamped from DC01 cold-rolled steel with a 2μm nickel coating, supported by thermoset melamine glass cloth side boards, 2 internal arc barriers, and PA66-GF30 gas-evolving liners, this modular assembly provides high breaking performance and dielectric integrity.

Key Technical Parameters & Material Specifications

Engineering Performance & Arc Extinguishing Principles

• Dual-Action Gas Quenching: The PA66-GF30 liners generate localized deionizing gas blasts upon arc contact, optimizing internal aerodynamic pressure to cool the plasma and restrict arc movement toward external boundaries.
• 12-Stage Series Splitting: Divides the primary fault arc into 13 short serial arcs, rapidly multiplying anode-cathode voltage drops to exceed line recovery voltage and force current limitation.
• Reinforced Phase Barriers: Two internal arc insulation barriers guide arc flow and shield adjacent conductive surfaces, preventing phase-to-phase flashovers under violent blowout conditions.
• Zero Carbon Tracking: Melamine glass cloth laminate side plates resist surface carbonization, preserving high insulation resistance over repeated trip operations.

Frequently Asked Questions (FAQ)