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Help CenterC-type Circuit Breaker FK80-125DC for Solar PV Systems and DC Battery Protection
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As a professional manufacturer of electrical protection equipment, Jinhua Dika Electrical Equipment Co., Ltd. is proud to introduce the FK80-125DC C-type Circuit Breaker. Engineered specifically for the demanding environments of modern renewable energy and DC power systems, this breaker is a critical component for ensuring safety and reliability. With over a decade of experience and a commitment to quality certified by multiple international standards, we design our products to meet the rigorous needs of global markets, from North America to Southeast Asia. The FK80-125DC is our solution for robust overcurrent and short-circuit protection in solar photovoltaic (PV) arrays and DC battery banks, offering installers and system integrators a dependable safeguard for their valuable investments.
This circuit breaker is meticulously crafted to address the unique challenges of DC circuit interruption. Unlike AC, DC lacks a natural current zero point, making arc extinction more difficult and placing greater stress on the breaking components. The FK80-125DC is built with this in mind, featuring advanced arc chute design and contact materials to ensure clean, reliable interruption of DC faults. Its C-type tripping characteristic provides a balanced response, offering protection against moderate overloads and high short-circuit currents, which is ideal for circuits with equipment that have moderate inrush currents, such as inverters and charge controllers commonly found in solar systems.
Key Features and Technical Advantages:
- High DC Voltage Rating: Designed for DC systems up to 1000V or 1500V, making it suitable for high-string voltage solar installations, which improves system efficiency and reduces wiring costs.
- Optimized for DC Breaking: Special internal construction enhances arc quenching capability for direct current, ensuring a higher breaking capacity and longer electrical life under DC conditions.
- Precise C-type Tripping Curve: Trips instantaneously at 5 to 10 times the rated current. This provides effective protection for cables and downstream devices while being tolerant of the temporary inrush currents from capacitive loads or motor starts in associated equipment.
- Robust and Durable Design: The housing is made from high-grade, flame-retardant engineering plastics with high CTI value, offering excellent insulation and resistance to environmental stress. The silver alloy contacts ensure low contact resistance and stable performance.
- Easy Installation and Maintenance: Standard DIN rail mounting (35mm) allows for quick and tool-free installation in distribution boards. The clear ON/OFF indicator and trip-free mechanism enhance operational safety and convenience.
- Wide Temperature Range: Stable performance across an extended ambient temperature range, ensuring reliability in both hot rooftop environments and cold battery rooms.
Technical Specifications Table:
| Parameter | Specification |
| Product Model | FK80-125DC |
| Rated Current (In) | 80A, 100A, 125A (Selectable) |
| Rated Operational Voltage Ue (DC) | 1000V / 1500V |
| Number of Poles | 1P, 2P, 3P, 4P |
| Rated Insulation Voltage Ui | 800V |
| Rated Impulse Withstand Voltage Uimp | 8kV |
| Tripping Characteristic | C-type (5-10 x In) |
| Breaking Capacity (Icu) at Ue | High, specific values available upon request |
| Electrical Durability | ≥ 10,000 cycles |
| Mechanical Durability | ≥ 20,000 cycles |
| Mounting | DIN Rail (35mm) |
| Terminal Connection | Screw Clamp, suitable for cable cross-sections up to 35mm² |
| Standards Compliance | IEC/EN 60898-1, IEC/EN 60947-2 |
Benefits for Your Solar PV and DC Battery Systems:
- Enhanced System Safety: Provides critical protection against overcurrents and short circuits, preventing potential fire hazards and protecting expensive PV modules, inverters, and battery banks from damage.
- Improved System Uptime: Reliable protection minimizes downtime caused by electrical faults, ensuring consistent energy harvest from solar arrays and reliable power supply from battery systems.
- Compliance and Peace of Mind: Helps system designers and installers meet electrical safety codes and standards for DC installations in many regions.
- Cost-Effective Solution: Durable design and long service life reduce the need for frequent replacements, offering a strong return on investment over the lifespan of the power system.
Jinhua Dika Electrical Equipment Co., Ltd. stands behind the quality of every FK80-125DC Circuit Breaker. Our manufacturing processes are guided by a comprehensive quality management system, and our products are trusted by clients across diverse markets, including North America, Europe, and Southeast Asia. With an annual export value reflecting our global reach and a dedicated team ensuring consistent production, you can source with confidence. This circuit breaker is more than just a component; it's a commitment to the safety and efficiency of your renewable energy projects. We encourage you to contact us for detailed datasheets, pricing, or to discuss custom requirements for your specific DC protection needs. Let us be your reliable partner in power protection.
Frequently Asked Questions (FAQ):
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Q: Can this FK80-125DC breaker be used for both PV string protection and battery bank protection?
A: Yes, absolutely. It is specifically designed for DC applications. For PV strings, it protects against reverse currents and faults. For battery banks, it safeguards against overcurrent conditions during charge/discharge, making it a versatile choice for complete DC system protection. -
Q: What is the difference between a "C-type" and other tripping curves (like B or D)?
A: The tripping curve defines the breaker's response time to overcurrent. A C-type trips instantaneously at 5-10 times the rated current, offering a balance. B-type (3-5x In) is more sensitive, while D-type (10-20x In) is for high inrush loads. C-type is commonly recommended for general circuits with moderate inrush, typical in solar systems. -
Q: Is this breaker polarized? Do I need to connect it in a specific direction for DC?
A: For optimal performance and to ensure the arc chute functions correctly, it is recommended to follow the polarity markings (+ and -) on the breaker terminals during installation, especially for higher voltage systems. -
Q: What is the maximum cable size the terminals can accommodate?
A: The screw clamp terminals on the FK80-125DC are designed to securely connect cables with a cross-sectional area up to 35mm², which is suitable for the high-current paths in solar and battery systems. -
Q: Does it have any auxiliary contacts or alarm signals?
A: The standard FK80-125DC is a thermal-magnetic protection device. Auxiliary contacts (signaling the breaker's status) or shunt trips (for remote tripping) may be available as optional accessories or in different product variants. Please inquire for specific configurations. -
Q: Are your products certified for use in North America (UL/CSA)?
A> While our manufacturing adheres to international IEC/EN standards, specific regional certifications like UL or CSA for this model should be confirmed at the time of inquiry, as certification requirements can vary by project and jurisdiction. -
Q: What is the typical lead time for an order?
A: As a manufacturer with efficient production capabilities, we generally maintain stock for standard models. Lead times can vary based on order quantity and specific requirements. We provide clear timelines upon receipt of your inquiry. -
Q: Can you provide custom labeling or specific packaging?
A: Yes, we offer customization services, including private labeling and specific packaging requirements, for bulk OEM orders. Please discuss your needs with our sales team.
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