Nale Electric is willing to work together with domestic and foreign merchants to create brilliance!
Product Overview
Achieve ultimate electrical safety and operational continuity with the CHNAILE NLM1L-125L series 4-Pole Earth Leakage Molded Case Circuit Breaker (MCCB). Engineered for rigorous industrial environments, this robust breaker operates reliably at AC 400V and handles heavy loads up to 125A. Unlike standard miniature breakers, the NLM1L series integrates highly sensitive, adjustable residual current protection (RCBO functionality) directly into a rugged molded case. With an exceptional insulation voltage (Ui) of 1000V and a 12kV impulse withstand rating (Uimp), it is the ultimate safeguard for commercial main switchboards, large machinery, and critical facility infrastructure.
1. Comprehensive Protection Functions
Overload & Short Circuit Protection: Provides precise thermal-magnetic tripping to protect heavy industrial equipment and main distribution wiring from severe overcurrent damage.
Adjustable Leakage Protection (Industrial RCBO): Features highly customizable earth-fault protection. Operators can easily adjust the residual current sensitivity (IΔn: 100mA / 300mA / 500mA) and the tripping time delay (Δt: 0.1s / 0.4s / 1s) to coordinate with downstream breakers and prevent nuisance tripping.
Fault Current Quick Break: Equipped with advanced arc-quenching chutes that safely interrupt massive fault currents up to 25kA (Icu), neutralizing hazards in milliseconds.
Lightning Surge Protection: High 12kV impulse withstand voltage (Uimp) protects the internal circuitry from severe voltage spikes and transient surges.
2. Premium Material & Robust Structure
High-Quality Flame Retardant Shell: Enclosed in a heavy-duty, thermosetting plastic molded case. It provides exceptional thermal stability, mechanical strength, and V0-grade fire resistance.
High Conductivity Copper Parts: Massive internal pure copper contacts and heavy-duty bolted terminals ensure minimal power loss, ultra-low temperature rise, and secure connections for 125A loads.
Strong Anti-Vibration Structure: The rugged internal mechanisms are engineered to withstand extreme vibrations commonly found in factories and heavy machinery operations.
3. Superior Performance Advantages
High Breaking Capacity: The formidable 25kA breaking capability safely quenches severe industrial short-circuits, preventing catastrophic panel meltdowns.
Stable Mechanical Life: Designed for longevity, guaranteeing thousands of flawless mechanical and electrical operations under maximum load conditions.
Clear Visual Diagnostics: Equipped with a dedicated 'TEST' button to verify leakage circuitry, a red 'Push to Trip' verification button, and clear ON/OFF/TRIP mechanical indicators for ultimate operator safety.
4. Why Choose CHNAILE Factory
Direct Manufacturer: Procure heavy-duty switchgear directly from the source. We provide highly competitive factory-direct pricing to maximize profit margins for electrical contractors and panel builders.
Strict Quality Control: Every MCCB undergoes 100% rigorous automated calibration, including leakage sensitivity testing, strictly complying with GB/T14048.2 and equivalent international standards.
Global Supply & OEM Support: We support bulk wholesale, rapid global fulfillment, and comprehensive OEM/ODM customization services to elevate your brand in the industrial sector.
