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The CHNAILE NLL7-63 series 1P plug-in 500V 50A DC circuit breaker is engineered exclusively for direct current power systems, with specialized optimization for solar photovoltaic applications. This plug-in DC MCB delivers dependable overload and short-circuit protection for DC circuits operating at up to 500V and 50A, featuring a precision Type C trip curve tailored to the unique characteristics of solar power systems. Its innovative plug-in mounting design eliminates complex wiring procedures, enabling rapid installation, effortless maintenance, and minimal system downtime—critical advantages for commercial and industrial solar installations where every minute of downtime translates to lost revenue.
Backed by CHNAILE Electric's decades of expertise in power system protection, this DC circuit breaker adheres to the strictest international safety standards, making it the preferred choice for solar installers, system integrators, and electrical contractors worldwide.
Parameter | Value |
|---|---|
Brand | CHNAILE |
Model | NLL7-63 |
Breaker Type | Plug-in Miniature Circuit Breaker (MCB) |
Current Type | Direct Current (DC) |
Rated Voltage (Ue) | DC 500V |
Rated Current (In) | 50A |
Trip Curve | Type C |
Breaking Capacity (Icu) | 10,000A (10kA) |
Pole Number | 1 Pole (1P) |
Mounting Type | Plug-in |
Standard Compliance | IEC 60898-1 |
Indicator Type | Green (ON)/Red (OFF) |
Housing Material | Flame-retardant thermoplastic |
Mechanical Endurance | 10,000 operations |
Electrical Endurance | 4,000 operations |
The revolutionary plug-in mounting system allows for complete installation or replacement in seconds without the need for specialized tools or extensive wiring. Compared to traditional DIN-rail mounted breakers, this design reduces installation time by over 80%, significantly lowering labor costs and minimizing system downtime during maintenance or upgrades. Simply align the breaker with the pre-wired base and push firmly until it clicks into place.
With an impressive 10kA interrupting rating, this DC circuit breaker provides exceptional protection against severe short-circuit faults that can cause catastrophic damage to expensive solar panels, inverters, and battery storage systems. It safely extinguishes DC arcs—a critical safety feature in solar applications where DC current flows continuously without zero-crossing points.
The integrated high-contrast green and red status indicator allows technicians to instantly identify the breaker's operating state from a distance. This simplifies routine system inspections, accelerates fault diagnosis, and reduces the risk of accidental contact with energized circuits during maintenance.
Manufactured from premium flame-retardant thermoplastic materials, the NLL7-63 series offers superior heat resistance and mechanical durability. It withstands the harsh environmental conditions commonly found in solar installations, including extreme temperatures, UV exposure, and humidity, ensuring reliable performance throughout its extended service life.
The optimized Type C trip characteristic is specifically calibrated for solar PV systems, tripping between 5-10 times the rated current. This design accurately distinguishes between normal inrush currents during system startup and genuine fault conditions, eliminating nuisance tripping that can disrupt power production and reduce system efficiency.
Ideal for residential, commercial, and utility-scale solar power installations, providing essential protection for PV array combiner boxes, inverter inputs, and DC distribution panels. It safeguards your solar investment against overcurrent and short-circuit damage.
Designed to protect lithium-ion, lead-acid, and other battery technologies in energy storage systems. It prevents thermal runaway and equipment damage caused by overcharging, discharging, or short circuits, ensuring the safe and reliable operation of your battery bank.
Provides critical protection for DC busbars in UPS systems, ensuring continuous power delivery to sensitive loads during utility outages. Its fast response time prevents damage to connected equipment and maintains system integrity.
Perfect for protecting DC power systems in telecom base stations, data centers, and remote communication facilities. The plug-in design allows for quick replacement without disrupting service, making it ideal for mission-critical applications.
Widely used in various industrial DC power systems, including electric vehicle charging stations, railway signaling systems, and industrial automation equipment, where reliable overcurrent protection is essential.
CHNAILE Electric has established itself as a trusted leader in the electrical protection industry through decades of innovation and commitment to quality. Our products are designed and manufactured to meet the evolving needs of modern power systems, with a particular focus on renewable energy applications.
We maintain rigorous quality control standards throughout our production process, from raw material sourcing to final product testing. Every NLL7-63 series DC circuit breaker undergoes comprehensive performance and safety testing to ensure compliance with IEC 60898-1 international standards.
Our global technical support team provides expert assistance with product selection, system design, and troubleshooting, helping you find the optimal protection solution for your specific application. We also offer flexible customization options to meet unique project requirements.
All CHNAILE NLL7-63 series DC circuit breakers are manufactured in our state-of-the-art facilities under an ISO 9001 certified quality management system. Each unit is subjected to rigorous testing procedures, including dielectric strength tests, temperature rise tests, and mechanical endurance tests, to ensure reliable performance in the field.
Our products comply with all relevant international safety standards and regulations, providing you with peace of mind that your electrical systems are protected by high-quality, certified equipment. We stand behind our products with a comprehensive warranty, covering defects in materials and workmanship.
DC circuit breakers are specifically engineered to interrupt direct current, which is significantly more challenging to extinguish than alternating current. They feature specialized arc quenching mechanisms designed to handle the continuous nature of DC current, preventing arc re-ignition and ensuring safe circuit interruption.
Yes, the NLL7-63 series is rated for DC 500V, making it suitable for use in both 250V and 500V DC applications. It provides the same level of reliable protection across its entire voltage range.
Type C trip curves are designed for circuits with moderate inrush currents, such as those found in solar PV systems, motor loads, and transformers. They trip between 5-10 times the rated current, providing excellent protection against short circuits while avoiding unnecessary tripping during normal startup conditions.
Installation is straightforward and requires no special tools. First, ensure the power to the circuit is turned off. Then, align the breaker with the plug-in base and push firmly until it clicks securely into place. Finally, restore power and verify proper operation using the status indicator.
Under normal operating conditions, the NLL7-63 series has a mechanical lifespan of over 10,000 operations and an electrical lifespan of over 4,000 operations. With proper maintenance and within specified operating parameters, it can provide reliable service for many years.
