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Product Overview
While most heavy industries rely on three-phase power, specific high-stakes applications demand massive electrical currents routed through a single phase. The CHNAILE Ultra-High Capacity 1-Pole Molded Case Circuit Breaker (MCCB) is explicitly engineered for this extreme niche. Capable of sustaining an immense 400 Ampere continuous draw on a single line, it acts as a bulletproof main disconnect for specialized AC 400V networks. Housed in a signature white, highly durable thermosetting polymer shell, and boasting a staggering 50,000A (50kA) ultimate breaking capacity, this IEC 60947-2 compliant switchgear offers the absolute highest tier of single-phase protection available to EPC contractors today.
Technical Parameters
Device Category: | Heavy-Duty Industrial Circuit Breaker (MCCB) |
|---|---|
Poles Configuration: | 1P (Extreme Capacity Single-Phase Disconnect) |
Rated Current (In): | 400A (Massive single-line capacity) |
Rated Operating Voltage (Ue): | AC 400V |
Rated Insulation Voltage (Ui): | 800V |
Rated Impulse Withstand Voltage (Uimp): | 8kV (Superior lightning & surge resilience) |
Ultimate Short-Circuit Breaking Capacity (Icu): | 50kA (Exceptional arc-quenching capability) |
Housing Enclosure: | Industrial White Thermosetting Cover |
Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Extreme Single-Phase Fault Mitigation
50kA Catastrophic Arc Quenching: Single-phase faults at 400A can generate explosive, concentrated arc flashes. This 1P MCCB features an oversized, vertically integrated arc chute assembly. It violently stretches, fragments, and extinguishes 50kA fault plasmas in milliseconds, preventing structural fires in specialized equipment panels.
400A Continuous Thermal Endurance: The massively upscaled bi-metallic elements are designed to carry extreme 400A continuous single-phase loads without exhibiting thermal fatigue, seamlessly sustaining the heavy inrush currents required by massive heating or rectifying equipment.
8kV Overvoltage Resilience: Fortified with exceptional 800V internal insulation and an 8kV Uimp rating, this white-cover switchgear acts as a firewall against extreme lightning transients and utility grid switching surges.
2. Ruggedized Structural Engineering
Distinctive White Thermosetting Armor: The internal mechanisms are permanently sealed within a heavy-duty, V0-rated white thermosetting polymer casing. This specialized material reflects internal heat, resists carbon tracking, and structurally contains the intense acoustic shockwaves generated during a 50kA fault.
Massive Silver-Alloy Contacts: Designed to route 400 Amps flawlessly through a single pole, the oversized moving contacts are heavily plated with industrial-grade silver-tungsten. This drastically reduces temperature rise and prevents the contacts from micro-welding under heavy loads.
Heavy-Gauge Bolt-On Lugs: Accommodates ultra-thick industrial single-phase cabling. The reinforced bolt-on terminals allow for extreme tightening torque, ensuring a rock-solid, zero-loss connection capable of enduring constant mechanical vibrations.
3. Target Application Scenarios
Due to its rare 1-Pole 400A continuous rating and 50kA breaking capacity, this white MCCB is exclusively specified for:
Heavy Electroplating & Electrolysis: Acting as the primary high-ampere AC disconnect for massive single-phase rectifiers used in metallurgical and electroplating facilities.
Telecommunication Core Exchanges: Serving as the ultra-reliable main single-phase incomer for heavy-duty DC power supplies in central 5G telecom hubs.
Large Single-Phase UPS Systems: Providing dedicated, heavy-duty isolation for massive battery banks and centralized Uninterruptible Power Supplies in medical or data facilities.
High-Power Heating Arrays: Safely managing the intense single-phase power requirements of industrial furnaces and commercial drying infrastructure.
4. Global B2B Partnership with CHNAILE Factory
Factory-Direct High-Ampere Procurement: Eliminate multi-tier distribution markups. Accessing our manufacturing lines directly provides you with aggressive wholesale pricing for these highly specialized single-pole industrial breakers.
Exhaustive IEC 60947-2 Verification: At 400 Amps on a single pole, failure is catastrophic. Every single white-cover MCCB is subjected to severe thermal imaging and 50kA short-circuit simulations to guarantee 100% compliance before global export.
Custom OEM Solutions for EPCs: We cater specifically to global panel builders, offering customized laser-engraved faceplates, bespoke packaging, and scalable manufacturing to support your brand's global expansion.
