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DC Molded Case Circuit Breakers for Solar Array Main Protection | 63A-630A | Up to 1200V DC
High breaking capacity and exceptional resistance to short arcs
KRIPAL manufactures DC molded case circuit breakers (DC MCCBs) in the UKM5DC and UKM32PV series for photovoltaic array-level protection and battery energy storage system main circuit isolation. Rated from 63A to 630A with a DC operational voltage up to 1500V DC, these breakers achieve robust breaking capacity (up to 50kA for specific models) to ensure system reliability. The UKM5DC and UKM32PV series feature reliable thermomagnetic trip units to provide precise protection against overloads and short circuits. Certified to IEC 60947-2 and GB/T 14048.2 standards, these MCCBs serve as the main disconnecting device in utility-scale solar combiner boxes and battery energy storage DC bus protection, with 2P, 3P, and 4P configurations available for various installation requirements.
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UKM5DC 1500V 400A 4 Pole DC MCCB PV Solar Molded Case Circuit Breaker
The UKM5DC-400 4P dc mccb is designed for DC distribution and energy storage systems.
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UKM32PV DC MCCB 3P 250A 750V for Battery Energy Storage Systems DC Molded Case Circuit Breaker
The Kripal UKM32PV is a robust 3P 250A 750V PV MCCB. Designed for Battery Energy Storage Systems.
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UKM32PV 400A 3P 750V DC MCCB for PV System Molded Case Circuit Breaker
The Kripal UKM32PV is a robust 3-pole 400A mccb designed for 750V DC networks. Engineered for PV systems.
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UKM32PV DC Molded Case Circuit Breaker 1000V 250A 4 Pole DC MCCB CE Certified
Kripal UKM32PV is a 4 Pole 250A 1000V DC Circuit Breaker. It ensures reliable protection for solar PV and energy storage systems.
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UKM32PV 400A 4 pole 1000V DC MCCB 4P DC Circuit Breaker CE Certified
UKM32-250PV DC Molded Case Circuit Breaker is designed for photovoltaic power generation and distribution systems.
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UKM5DC-250 2 Pole 250 amp DC MCCB CE Certified
The UKM5DC-250 2 Pole 250amp dc mccb is designed for DC distribution and energy storage systems.
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UKM5DC DC MCCB 3P 250A 1500V PV Solar Molded Case Circuit Breaker
The Kripal UKM5DC is a robust 3-phase DC moulded case circuit breaker with a rated current of 250A and a rated voltage of 1500V.
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UKM5DC 3P 400A DC MCCB 1000V 400A DC Molded Case Circuit Breaker 3 Pole CE Certified
The Kripal UKM5DC circuit breaker is rated at 1000V and is CE certified, providing excellent protection for solar photovoltaic systems.
Ask a QuoteDC MCCB Selection Guide for PV Array and Battery Storage Main Protection
A DC molded case circuit breaker (MCCB) provides main circuit protection for PV array combiner boxes, inverter DC inputs, and battery storage DC buses where fault currents exceed the capacity of miniature circuit breakers. KRIPAL’s UKM5DC and UKM32PV series utilize robust contact structures to handle high continuous currents and short-circuit levels. This selection guide covers frame sizes, thermomagnetic trip unit configurations, and pole counts suitable for your PV power plant DC distribution architecture.
UKM5DC & UKM32PV DC MCCB Series Technical Specifications
Frame Size and Current Range Selection
The UKM5DC series is available in frame sizes up to 630A, while the UKM32PV series covers ratings from 63A to 400A.Select the frame size based on the maximum continuous current of your PV sub-array or battery rack, ensuring compliance with relevant safety factors for continuous-duty DC circuits.The thermomagnetic trip units provide reliable, fixed-point protection, ensuring stability across various current ratings in your project.
Thermomagnetic Trip Unit Configuration
The UKM5DC and UKM32PV series employ thermomagnetic trip mechanisms to provide precise protection against overloads and short circuits.These breakers are designed for high-performance arc extinction in DC environments, ensuring rapid fault clearing.Settings are factory-calibrated to provide consistent and reliable protection for photovoltaic distribution lines.
DC Breaking Technology and Pole Count
The UKM32PV series offers high breaking capacity, with options of 20kA (N-type) and 50kA (H-type).These units support operational voltages up to DC 1000V or 1500V, providing superior performance in utility-scale solar and energy storage systems.Available in 2P, 3P, and 4P configurations, these breakers provide flexible protection for both grounded and ungrounded DC systems.
Accessories and System Integration
UKM5DC and UKM32PV series support a wide range of internal and external accessories, including auxiliary contacts, alarm contacts, shunt trips, and undervoltage releases.Optional motor operators and rotary handles are available to facilitate remote control and manual operation requirements.These breakers are designed for integration into diverse equipment, such as combiner boxes, DC panels, and energy storage systems, ensuring seamless system-wide monitoring and control.
Specify DC MCCBs for Your Utility-Scale Project
- Protection Coordination Study: Submit your single-line diagram for a comprehensive DC protection analysis, utilizing the time-current characteristic curves of the UKM5DC and UKM32PV series to ensure effective coordination with downstream DC protective devices.
- System Integration Support: Contact our technical team for detailed wiring diagrams and integration guides to incorporate auxiliary contacts, alarm contacts, and motor operating mechanisms into your power plant control and monitoring systems.
- OEM Volume Programs: Consult our utility-scale solar team regarding project-specific pricing, extended warranty terms, and dedicated production scheduling for large-scale solar and energy storage projects.
Main Array Protection for Utility-Scale Solar and Battery Storage
KRIPAL UKM5DC and UKM32PV series DC MCCBs serve as the primary circuit protection and isolation devices at the DC combiner output and battery container inlet in utility-scale PV and energy storage installations. With robust breaking capacity and reliable performance, these breakers are the standard choice for DC distribution systems in modern renewable energy infrastructure.
Utility-Scale PV Array Recombiner Protection
In a large-scale solar farm, the UKM5DC-630 3P DC MCCB installed at the recombiner output protects the main DC feeder cable from the recombiner to the inverter DC input against overload and short circuit. These breakers ensure stable performance, protecting the main feeder while maintaining power output from healthy strings within the inverter block.
Battery Energy Storage Container Main DC Breaker
A BESS container typically deploys a UKM32PV-250 3P DC MCCB as the main breaker between the battery DC bus and the PCS (Power Conversion System) DC input. The design provides reliable operation for charge and discharge currents. Optional motor operator accessories can be integrated to allow remote isolation of the battery stack from the DC bus for safety management.
DC Fast Charging Station Feeder Protection
For DC fast charging plazas, UKM5DC-630 DC MCCBs at the rectifier output and feeder points provide selective protection. This ensures that a fault in one feeder group can be cleared efficiently, maintaining the availability of the overall charging infrastructure.
DC Microgrid Bus-Tie Circuit Breakers
DC microgrids in commercial and industrial facilities use UKM5DC and UKM32PV DC MCCBs as bus-tie breakers between various DC sources (such as PV and battery systems) and the common DC bus. These units provide reliable isolation and protection for systems feeding DC-native loads like LED lighting and data centers. The undervoltage release accessory can provide automated bus isolation requirements.
Industrial DC Motor Control Center Main Breaker
Steel mills, paper machines, and mining conveyors powered by DC motors use UKM5DC-630 DC MCCBs as the main incoming breaker in DC motor control centers (MCCs). The adjustable thermomagnetic protection helps manage motor starting inrush currents while ensuring rapid fault clearing. The shunt trip accessory can be wired into control circuits for coordinated shutdown sequences, protecting both the breaker contacts and motor equipment.
Deploy DC MCCBs in Your Renewable Energy System
- Complete Protection Schemes: Request a technical consultation to optimize the UKM5DC and UKM32PV series protection settings for your specific PV array or battery system topology to ensure effective overload and short-circuit protection.
- Type-Test Certification Package: Obtain IEC 60947-2 and GB/T 14048.2 test reports, as well as UL 489B compliance documentation for project due diligence and technical verification.
- Factory Acceptance Testing: Schedule a witnessed Factory Acceptance Test (FAT) at our manufacturing facility, where your breakers are verified according to your specified requirements before shipment.
KRIPAL DC MCCB Production: Built for High-Performance DC Interruption
KRIPAL’s UKM5DC and UKM32PV series DC molded case circuit breakers are manufactured under rigorous quality control processes for reliable performance in high-power applications. Each unit undergoes comprehensive production testing, including dielectric withstand and trip unit calibration, ensuring they meet the stringent demands of global PV array and battery storage system builders.
High-Power DC Test Laboratory for Production Verification
KRIPAL utilizes advanced testing facilities to ensure every breaker meets high-voltage requirements. Ongoing production samples are verified for DC breaking performance in strict accordance with IEC 60947-2 and GB/T 14048.2 standards, ensuring consistent safety and reliability for photovoltaic distribution.
Precision Material Engineering
The MCCB cases are engineered for durability and safety, featuring high-quality housing materials designed for excellent arc resistance and thermal stability. This is critical for DC applications, where sustained arcing requires superior material performance to maintain structural and electrical integrity.
Advanced Contact Assembly
The contact assemblies are manufactured using high-conductivity materials brazed to precision-engineered copper carriers. The assembly is optimized for DC polarity conditions, effectively managing unidirectional current flow and minimizing contact erosion to ensure long-term operational life.
DC Current-Rating Production Line Testing
Every DC MCCB undergoes production-line thermal testing at rated current to ensure optimal performance in real-world conditions. Temperature rise at the terminals is strictly monitored and compared against calibrated benchmarks, ensuring only units that meet precise thermal standards are shipped.
Distributor Stock Holding Program
KRIPAL supports partner inventory programs with agreed stock levels for standard UKM5DC and UKM32PV models. We facilitate scheduled replenishment to maintain stable supply chains and consistent product availability for our distributors.
Private Label and OEM Branding
We offer comprehensive customization services, including laser-marked part numbers, OEM-branded packaging, and customized instruction sheets to align with your catalog requirements. Unbranded supply is also available for private label production.
Multi-Region Certification and Compliance
Compliance documentation for IEC 60947-2 and GB/T 14048.2 is provided to support target export markets. Technical files are maintained and updated to align with evolving regulatory requirements, ensuring smooth conformity assessments for DC power distribution projects.
Direct Technical Access to KRIPAL Engineers
Our clients gain direct access to the technical team responsible for the design and testing of the UKM5DC and UKM32PV series. Application-specific inquiries receive expert responses within 24 hours during business hours.
Frequently Asked Questions
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