LETOP 1000V DC Circuit Breaker manufacturer. Offering MCB & MCCB for custom OEM solutions and distribution.
Securing DC applications operating at 1000V DC demands dependable circuit protection and isolation. LETOP’s 1000V DC Miniature Circuit Breakers (MCB) and Molded Case Circuit Breakers (MCCB) are engineered as essential components, certified to IEC 60947-2. These breakers provide critical overcurrent and short-circuit protection, alongside reliable manual disconnection capabilities for 1000V circuits. More DC circuit breakers please click here.
Fully compliant with the specific requirements of IEC 60947-2 for DC circuit breakers operating up to 1000V, guaranteeing safety and performance in demanding applications.
Incorporates robust thermal-magnetic trip units (MCBs) or electronic trip units (MCCBs), calibrated for accurate protection against overloads and short circuits within 1000V DC circuits.
Designed to reliably operate under the electrical stresses and environmental conditions typical of 1000V commercial, utility-scale solar, energy storage, and industrial installations.
Standardized dimensions and secure 35mm DIN rail mounting (MCB) or chassis mounting (MCCB) for easy installation in combiner boxes, DC distribution panels, and equipment enclosures.
We offer a comprehensive range of DC circuit breakers, including both Miniature Circuit Breakers (MCBs) for string and sub-array protection, and Molded Case Circuit Breakers (MCCBs) for higher current applications and main circuit protection. Explore our offerings below.
Overcurrent/short-circuit protection and isolation for PV strings, arrays, or DC circuits in commercial, industrial, and utility-scale solar systems operating up to 1000V DC. Commonly used in combiner boxes.
Protect your main DC feeders, battery banks, or high-power DC loads in commercial, industrial, and utility-scale systems operating up to 1000V DC with overcurrent/short-circuit protection and isolation. Typically for higher current applications and system main disconnects.
Ensures accurate response to overloads and short circuits specific to 1000V DC environments.
Proven ability to safely interrupt potential high fault currents in large 1000V solar arrays.
Internal design effectively extinguishes DC arcs at 1000V for safe interruption.
Designed for secure and reliable connections with larger conductors required for higher current applications.
Electronic trip units offer adjustable overload and short-circuit settings for precise protection and coordination.
Quick, secure installation compatible with standard enclosures.
We understand that every solar project is unique. Find the perfect LETOP combiner box solution organized by what matters most to you.
Partner with LETOP for reliable, IEC 60947-2 certified 1000V DC circuit breaker components. Ensure system safety and performance with our quality-controlled products, flexible supply, and dedicated support.
LETOP is a trusted supplier of high-performance 1000V DC MCB/MCCB components. We combine rigorous quality control with scalable production to deliver ODM/OEM breakers that meet stringent industry standards. Whether you need bulk procurement for utility installations or customized technical guidance, we prioritize reliability at every stage to ensure your systems operate safely and efficiently in demanding DC conditions.
Rigorous QC ensures uniformity across batches of MCBs and MCCBs, critical for manufacturers integrating 1000V breakers into their products.
We manufactured to meet the demand for 1000V breaker ratings in commercial and utility projects.
Use our manufacturing expertise to get a cost-effective, certified 1000V DC circuit breaker for your project budget.
Technical expertise available to assist in selecting the optimal 1000V breaker configuration for your specific design requirements.
Our commitment to excellent manufacturing and quality control is what sets us apart in 1000V DC systems. Our multi-stage quality assurance program, which includes testing specific to 1000V applications like dielectric strength verification, precise trip calibration (thermal-magnetic or electronic), and extensive endurance testing.
Here you can find some of your common questions related to 1000V DC Breaker, which can help answer your doubts.
Standard 1000V DC circuit breaker models are typically available from stock with 7-10 day delivery. It'll take you 15-20 days to make OEM custom service. We keep strategic inventory for major markets and can set up consignment stock programs for high-volume customers.
Yes, we offer comprehensive OEM/ODM services for 1000V DC circuit breakers. We can customize product labeling, housing colors, terminal configurations, and packaging design to match your brand requirements. Our OEM services include private labeling, custom part numbering systems, and co-branded documentation. Minimum order quantities for OEM products start at 1,000 pieces, with dedicated account management and priority production scheduling for OEM partners.
Absolutely. Our 1000V DC circuit breakers feature programmable trip characteristics that can be customized for specific solar array configurations. We can adjust thermal trip curves, instantaneous trip levels, and time delays to optimize protection coordination with your system design. Custom trip settings are available for applications requiring selective coordination, motor protection, or specialized load characteristics. We provide detailed trip curve analysis and testing reports for all custom configurations.
We 've got all kinds of accessories including auxiliary contacts (NO/NC), alarm contacts, undervoltage/overvoltage releases, shunt trip coils, and motor operators for remote switching. Additional components include draw-out mechanisms, extended handles for panel door mounting, padlocking devices, and surge protective device (SPD) integration kits. All accessories work perfectly with our 1000V DC circuit breaker platform, ensuring compatibility and reliability.
Based on our detailed altitude capacity reduction coefficient table, our 1000V DC circuit breakers maintain full ratings up to 2500m elevation. Above this altitude, three key parameters require derating:
Working Current Capacity: Minimal derating - maintains 98% capacity at 3000m, 97% at 3500m, and 96% at 4000m, dropping to 94% at 5000m elevation.
Short-Circuit Breaking Capacity: More significant derating required - reduces to 83% at 3000m, 77% at 3500m, 71% at 4000m, and 63% at 5000m elevation.
Power Frequency Withstand Voltage: Moderate derating - decreases to 89% at 3000m, 85% at 3500m, 80% at 4000m, and 73% at 5000m elevation.
For high-altitude solar installations above 3000m, we recommend oversizing the breaking capacity by 20-30% during initial selection to compensate for altitude effects. Our engineering team provides customized selection charts and can specify enhanced models with higher base ratings specifically designed for extreme elevation projects, ensuring reliable protection performance even at altitudes up to 5000m.
We provide comprehensive remote technical support including 24/7 hotline assistance, online troubleshooting guides, and video consultation services. Our technical team offers remote diagnostic support, helping identify issues through detailed symptom analysis and providing step-by-step resolution procedures. For complex technical issues, we can arrange remote screen-sharing sessions with our engineers to review system designs, analyze protection coordination, and provide real-time technical guidance to ensure optimal circuit breaker performance in your solar applications.
If no relevant issues are found, please contact us, E-mail:info@letopv.com.
If you have any questions, please contact us and we will reply within 24 hours.
No. 19, Fenjin Road, Dongfeng Industrial Zone, Yueqing, Wenzhou, China 325604
info@letopv.com
+86-13175631986
