Nale Electric is willing to work together with domestic and foreign merchants to create brilliance!
The CHNAILE NLL7-63 series 2-Pole Plug-in DC MCB is built to meet the rigorous demands of direct current applications, particularly in the rapidly growing renewable energy sector. Unlike standard AC circuit breakers, this unit is optimized to handle the unique characteristics of DC power, including sustained arc formation during fault conditions. With its modular plug-in architecture, the NLL7-63 eliminates the need for complex rewiring during maintenance, allowing technicians to swap out faulty units in seconds rather than minutes. This makes it an ideal choice for mission-critical solar systems where downtime directly translates to lost revenue.
Parameter | Specification |
|---|---|
Brand | CHNAILE |
Model | NLL7-63/2P |
Number of Poles | 2 Pole |
Current Type | DC (Direct Current) |
Rated Voltage (Ue) | DC 500V |
Rated Current (In) | 50A |
Breaking Capacity (Icu) | 10,000A (10kA) |
Standard Compliance | IEC60898-1 |
Mounting Type | Plug-in (requires compatible base) |
Indication | Green/Red visual status indicator |
Housing Material | Flame-retardant thermoplastic |
Operating Temperature Range | -25°C to +55°C |
Mechanical Endurance | 10,000 operations |
Electrical Endurance | 4,000 operations |
The NLL7-63 features an innovative plug-in architecture that eliminates the need for complex wiring during installation and replacement. Simply pull out the faulty unit and plug in a new one in seconds. This design reduces installation time by up to 70% compared to traditional wired breakers, minimizing labor costs and system downtime for your solar projects. For large-scale commercial installations, this can translate to significant savings in both time and money over the lifespan of the system.
With a robust 10kA short-circuit breaking capacity, the 500V 50A DC breaker provides superior protection against extreme fault conditions that can occur in solar PV systems. This high breaking capacity ensures that the breaker can safely interrupt even the most severe short circuits, preventing damage to expensive solar panels, inverters, and other system components. It also enhances the overall safety of your installation, reducing the risk of electrical fires and equipment damage.
The NLL7-63 is perfectly rated at DC 500V, making it ideal for string protection in both residential and commercial solar PV installations. This voltage rating is specifically designed to match the output of modern solar panel strings, ensuring optimal protection without unnecessary overrating. The 2-pole configuration provides complete isolation of both positive and negative conductors, offering enhanced safety compared to single-pole breakers in DC systems.
Equipped with a clear Green/Red visual status indicator window, the NLL7-63 allows operators to easily identify the ON/OFF status of the breaker at a glance. This eliminates guesswork during routine maintenance and troubleshooting, reducing the time required to diagnose and resolve issues. The indicator is highly visible even in low-light conditions, making it suitable for use in combiner boxes and other enclosed spaces.
Constructed from high-quality, fire-resistant thermoplastic materials, the NLL7-63 offers exceptional durability and safety in harsh operating environments. The flame-retardant housing prevents the spread of fire in the event of an electrical fault, while also providing excellent resistance to impact, UV radiation, and chemical corrosion. This ensures a long service life even in outdoor and industrial applications.
This 2P DC 500V breaker is widely used in various renewable energy and DC power applications, including:
Solar PV Combiner Boxes: Provides overcurrent protection for individual solar panel strings
Battery Energy Storage Systems (BESS): Protects battery banks and charge controllers
Electric Vehicle (EV) Charging Stations: Safeguards DC fast charging infrastructure
Off-grid DC Power Systems: Ideal for remote locations without access to the utility grid
Residential & Commercial Solar Installations: Suitable for both rooftop and ground-mounted systems
When you choose the CHNAILE NLL7-63 DC circuit breaker for solar PV, you're investing in a product that combines cutting-edge technology with rigorous quality control. All our breakers undergo extensive testing to ensure compliance with international safety standards, including IEC60898-1. Our experienced engineering team is dedicated to developing products that meet the evolving needs of the renewable energy industry, and we offer comprehensive technical support to help you select and install the right protection solutions for your projects.
Ensure the system is completely de-energized before beginning installation
Align the breaker with the compatible plug-in base
Push firmly until the breaker clicks into place
Verify that the breaker is securely mounted
Restore power and test the breaker operation
Inspect the breaker regularly for signs of damage or overheating
Test the tripping mechanism at least once a year
Keep the breaker and surrounding area clean and free of dust and debris
Replace the breaker immediately if it shows any signs of malfunction
Always use genuine CHNAILE replacement parts for optimal performance
AC and DC circuit breakers are designed differently to handle the unique characteristics of alternating current and direct current. DC arcs are more difficult to extinguish than AC arcs because DC current does not naturally cross zero. DC circuit breakers use special arc quenching mechanisms to safely interrupt DC current, making them essential for solar PV and battery systems.
Yes, the NLL7-63 can be used for 48V battery systems and other lower voltage DC applications. However, it is important to ensure that the rated current of the breaker is appropriate for the specific application.
We recommend testing the tripping mechanism of your solar PV circuit breaker at least once a year to ensure it is functioning properly. For commercial installations with higher usage, more frequent testing may be necessary.
Under normal operating conditions, the NLL7-63 has a mechanical endurance of 10,000 operations and an electrical endurance of 4,000 operations. With proper maintenance, it can provide reliable service for 10-15 years.
The NLL7-63 requires a compatible plug-in base for installation. Please check the specifications of your combiner box to ensure compatibility, or contact our technical support team for assistance.
Protect your solar investment with the reliable performance of the CHNAILE NLL7-63 2P plug-in 500V 50A DC circuit breaker. Contact our sales team today to request a quote or to learn more about our complete range of solar protection solutions. We offer competitive pricing, fast delivery times, and exceptional customer support to help you complete your projects on time and on budget.
