1500V, 630A & 100kA Breaking Capacity | Zhnyu

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Dc Fuse Block Advantages Engineered By Zhnyu Electric

Dc Fuse Block Advantages Engineered By Zhnyu Electric

Zhnyu Electric, an electrical manufacturer founded in 1992 with 34 years of production experience, delivers Dc Fuse Block solutions built for photovoltaic, energy storage, railway and industrial control duty. Each Dc Fuse Block is rated from 1000V DC to 1500V DC, carries 10A to 630A, and achieves breaking capacity up to 100kA, protecting combiner boxes, string inverters and battery racks from overload and short circuit events. Our 100+ production equipment units and 10,000+ square meter facility produce over 1.2 million poles annually, while 60+ export countries have adopted our Dc Fuse Block for solar farms and DC distribution panels. In a 120MW photovoltaic plant in Spain, 4,800 Dc Fuse Blocks reduced nuisance tripping by 42% compared with previous suppliers.
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Case Study

120MW Spanish Solar Farm Cuts Fault Downtime With Dc Fuse Block

A Spanish EPC contractor managing a 120MW photovoltaic farm faced frequent string inverter shutdowns caused by nuisance tripping of generic DC fuse holders. Zhnyu Electric supplied 4,800 Dc Fuse Blocks rated 1500V DC and 32A with high-speed silver-plated fuse links. Our engineering team reworked busbar spacing and torque specifications, improving heat dissipation across combiner boxes. After commissioning, nuisance tripping fell 42% and annual maintenance hours dropped by 1,100. The customer standardized the Dc Fuse Block across three additional solar sites totaling 260MW.

Indian Metro Rail Project Adopts 1500V Dc Fuse Block For Traction Power

An Indian metro rail authority required reliable 1500V DC protection for auxiliary traction circuits exposed to vibration, humidity and temperature swings. Zhnyu Electric delivered 2,300 Dc Fuse Blocks with reinforced housings, anti-vibration terminals and IP20 finger-safe covers. Over 36 months of operation, field failures stayed below 0.12%, and scheduled maintenance visits decreased 35%. The railway approved our Dc Fuse Block for two upcoming lines, citing stable performance and clear technical documentation.

German Battery Storage Integrator Scales 630A Dc Fuse Block Deployment

A German energy storage integrator needed a 630A Dc Fuse Block for containerized battery racks operating at 1000V DC. Zhnyu Electric custom-engineered copper busbars, dual-indicator fuse monitoring and modular mounting, completing prototypes within seven days. Temperature rise remained below 45K at full load during 2,000-hour cycling tests. The integrator deployed 5,600 units across 18 projects, reporting 28% faster panel assembly and zero thermal events during two years of field operation. Products Title: Reliable Dc Fuse Block Products For Solar, Storage And DC Distribution

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Dc Fuse Block manufacturing at Zhnyu Electric reflects 34 years of low-voltage electrical expertise and a vertically integrated production philosophy. Since 1992, our 10,000+ square meter facility has combined R&D, tooling, injection molding, metal stamping, assembly and testing under one roof, supported by 100+ production equipment units including CNC machining centers, automatic winding machines, high-precision stamping presses and programmable temperature-rise test benches. This integration allows us to control every critical dimension of the Dc Fuse Block, from contact geometry to terminal torque values, ensuring consistent quality across high-volume orders. The production process begins with stringent incoming material inspection. Copper busbars are verified for conductivity above 99.9% and silver-plated fuse contacts are checked for plating thickness. 

Frequently Asked Questions

What Voltage And Current Ratings Does A Dc Fuse Block Support?

Zhnyu Electric Dc Fuse Blocks support 1000V DC to 1500V DC systems with current ratings from 10A to 630A. Breaking capacity reaches 100kA, suitable for photovoltaic, energy storage and railway applications. Selecting the correct rating depends on system voltage, continuous current, ambient temperature and fault level. Our engineers help match the Dc Fuse Block to your application.
DC circuits lack natural current zero-crossing, so a Dc Fuse Block requires wider contact gaps, stronger arc-extinguishing materials and higher breaking capacity. Zhnyu Electric designs Dc Fuse Blocks with silver-plated contacts, flame-retardant PA66 housings and tested arc chambers to safely interrupt DC faults in solar and storage systems.
Yes. We offer OEM/ODM services including custom busbar layouts, pole counts, terminal types, labeling and packaging. Prototypes are typically ready within seven days. With 100+ production equipment units and 34 years of experience, we support panel builders and EPC contractors requiring tailored Dc Fuse Block solutions.
Our Dc Fuse Blocks comply with ISO9001, CCC and CE, and meet RoHS requirements. Each unit passes dielectric testing at 2500V AC, contact resistance measurement, temperature-rise checks and cycle testing. Traceability codes enable lot-level quality audits for global customers.

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Customer Testimonials

Carlos Mendes
Stable Protection Across 260MW Of Solar Projects

We deployed 4,800 Zhnyu Electric Dc Fuse Blocks at our 120MW Spanish photovoltaic plant. Nuisance tripping dropped 42% and maintenance hours fell by 1,100 annually. The engineering support and documentation quality exceeded expectations.

Priya Raghavan
Dependable 1500V Dc Fuse Block For Metro Traction

Our metro project required 2,300 Dc Fuse Blocks rated 1500V DC for auxiliary traction circuits. After 36 months, field failures stayed below 0.12% and maintenance visits decreased 35%.

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34 Years Of Dc Fuse Block Manufacturing Excellence

34 Years Of Dc Fuse Block Manufacturing Excellence

Zhnyu Electric has manufactured low-voltage electrical components since 1992, accumulating 34 years of production experience that directly benefits every Dc Fuse Block we ship. Our 10,000+ square meter facility and 100+ production equipment units support integrated R&D, tooling, molding, stamping, assembly and testing. This vertical integration lets us control contact geometry, terminal torque and housing quality for consistent performance. In photovoltaic combiner boxes, energy storage racks and railway auxiliary circuits, our Dc Fuse Block maintains stable protection across wide temperature ranges. Data from field deployments shows nuisance tripping reduced by 42% in a 120MW Spanish solar plant and field failures below 0.12% over 36 months in an Indian metro project.
Certified Dc Fuse Block Quality Verified By Global Standards

Certified Dc Fuse Block Quality Verified By Global Standards

Every Zhnyu Electric Dc Fuse Block is produced under ISO9001, CCC and CE certifications, with a metering production license and strict RoHS compliance. These credentials matter when your project faces utility inspections, insurance audits or tender requirements. Each unit passes dielectric withstand testing at 2500V AC, contact resistance measurement, temperature-rise verification below 45K at full load, and mechanical cycle testing. Traceability codes enable lot-level retrieval, so quality teams can audit material batches and test records quickly. Our Dc Fuse Block serves 60+ export countries across power, construction, photovoltaic, petroleum, chemical, metallurgical and railway industries. In a German battery storage program, 5,600 units passed 2,000-hour cycling tests with zero thermal events over two years.
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ZHNYU ELECTRIC provides certified low-voltage electrical components—including isolating switches, MCCBs, ACBs, ATS, and DC fuses—for power, industrial, and photovoltaic applications. ISO9001, CE, CCC, RoHS compliant. Serving 60+ countries. Partner with us today.ZHNYU ELECTRIC, founded in 1992, is a professional manufacturer integrating R&D, production and sales of low-voltage electrical components and accessories.

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East Qinghe Road, Shahu Industrial Zone, Liushi Town, Yueqing, Wenzhou, Zhejiang

+86-13587761982

[email protected]

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