With the rapid development of solar photovoltaic (PV) power generation technology, the safety and stability of solar systems have become increasingly important. Among the core components of the solar system, Dc Circuit Breakers For Solar play an irreplaceable role in protecting the DC side of the system from overcurrent, short circuit and other faults. As a key protective device, it is closely related to the safe operation and service life of the entire solar power generation system. Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) specializes in high-performance DC circuit protection devices, and its CJMD2-63 series DC MCB (DC circuit breaker) is specially designed for solar and new energy systems, providing reliable overcurrent protection for various low-voltage DC power distribution scenarios.
Core Definition & Key Features of Dc Circuit Breakers For Solar
DC circuit breakers are automatic protective devices used in solar power systems to interrupt the flow of electricity in the event of an overcurrent. Unlike fuses, circuit breakers can be reset after they trip, either manually or automatically, without needing replacement. Specifically, Dc Circuit Breakers For Solar are a type of specialized DC circuit breaker designed for the characteristics of solar power systems, which can adapt to the high-voltage, low-current working environment of the DC side of solar PV systems and effectively cope with the transient current impact caused by light intensity changes and system faults.
Different from AC circuit breakers, Dc Circuit Breakers For Solar need to solve the problem of DC arc extinguishing—due to the unidirectional flow of DC current, the arc generated during breaking is more difficult to extinguish, which requires the product to have excellent arc extinguishing performance and high breaking capacity. In addition, solar systems often work in outdoor or complex environments, soDc Circuit Breakers For Solar also need to have the characteristics of small size, high reliability, and strong environmental adaptability to meet the installation and operation needs of the system.
Core Overview of Dc Circuit Breakers For Solar
Dc Circuit Breakers For Solar are specialized automatic protective devices designed for the DC side of solar photovoltaic power generation systems, energy storage systems and other new energy scenarios. They are mainly used in the low-voltage DC power distribution link of the system to monitor the current of the DC circuit in real time. When the circuit has overcurrent, short circuit and other faults, they can quickly trip to interrupt the circuit, prevent the fault from expanding, and protect the solar modules, inverters, energy storage batteries and other core components from damage.
Compliant with international and national standards,Dc Circuit Breakers For Solar integrate protection, control and isolation functions. They are small in size, simple in structure and easy to install, and can be flexibly matched with other solar system components (such as combiner boxes, inverters) to form a complete DC side protection system. C&J Electrical’s CJMD2-63 series DC MCB not only meets the needs of solar systems, but also is widely applicable to other new energy and low-voltage DC power distribution scenarios, with strong versatility.
Core Functions of Dc Circuit Breakers For Solar
C&J Electrical’s CJMD2-63 series Dc Circuit Breakers For Solar integrate multiple core protection functions, providing all-round and reliable protection for the DC side of solar systems and other new energy systems. Its main functions include:
- Overcurrent protection: Equipped with thermo-magnetic release, it can quickly respond to overcurrent faults in the circuit (release characteristic: 10In±20%), trip in time to interrupt the current, and prevent components from being damaged by long-term overcurrent.
- Short-circuit protection: With high rated breaking capacity (6kA), it can effectively extinguish the DC arc generated during short-circuit faults, quickly cut off the fault circuit, and avoid the fault from expanding to the entire system.
- Reusable reset function: Unlike fuses that need to be replaced after tripping, it can be manually or automatically reset after tripping, reducing maintenance costs and improving system operation efficiency.
- Flexible expansion: Can be equipped with auxiliary contacts, alarm contacts, shunt trip and other accessories, which is convenient for system monitoring and remote control, and meets the intelligent control needs of solar systems.
- Isolation function: When the circuit is disconnected, it can provide reliable electrical isolation, ensuring the safety of maintenance personnel during equipment inspection and maintenance.
- Easy installation and wiring: Small size, unipolar width of 18mm, support top and bottom wiring, compatible with standard installation methods, easy to integrate into solar combiner boxes and distribution panels.
Application Scenarios of Dc Circuit Breakers For Solar
With the advantages of high reliability, excellent protection performance and wide adaptability, Dc Circuit Breakers For Solar are not only widely used in solar photovoltaic power generation systems, but also applicable to various new energy and low-voltage DC power distribution scenarios. The main application fields are as follows:
- Solar photovoltaic (PV) systems: Used in the DC side of residential, commercial and industrial solar PV systems, including PV module strings, combiner boxes, inverters and energy storage systems, protecting the entire DC power distribution link from overcurrent and short-circuit faults.
- Energy storage systems: Matching with lithium-ion batteries, lead-acid batteries and other energy storage equipment, protecting the DC charging and discharging circuit of the energy storage system, preventing overcurrent and short circuit caused by battery failure.
- Digital and computer centers: Used in the low-voltage DC power distribution system of data centers and computer rooms, protecting servers, UPS power supplies and other core equipment, ensuring the stable operation of the power supply system.
- Communication systems: Communication base stations, network equipment rooms and other scenarios, protecting the DC power supply circuit of communication equipment, avoiding equipment damage caused by power supply faults.
- Intelligent cities and public facilities: DC power distribution systems of intelligent buildings, municipal lighting, public charging piles and other facilities, providing reliable overcurrent protection for the system.
- Transportation and micro power grids: DC power supply systems of electric vehicles, rail transit and micro power grids, adapting to the complex working environment and ensuring the safe operation of the system.
C&J Electrical’s CJMD2-63 Series DC MCB: Core Advantages & Specifications
C&J Electrical’s CJMD2-63 series DC MCB is a high-performance Dc Circuit Breakers For Solar specially designed for new energy and low-voltage DC power distribution systems. It complies with international and national standards, with small size, simple structure and high reliability, and is widely applicable to various DC power supply scenarios. Its core advantages, product overview and technical parameters are as follows:
Product Overview & Core Advantages
- Wide application scope: Suitable for DC power distribution systems in new energy DC power generation, energy storage, digital and computer centers, communication systems, smart cities, smart homes, transportation and micro power grids, with rated voltage up to DC1000V and rated current up to DC63A.
- International standard compliance: Designed and manufactured in accordance with GB/T 14048.2 and IEC60947-2 standards, ensuring product quality and safety performance, and compatible with global application scenarios.
- Compact and reliable: Small size, simple structure, high reliability, unipolar width of 18mm, saving installation space and facilitating integration into various distribution equipment.
- Flexible configuration: Can be equipped with auxiliary contacts, alarm contacts, shunt trip and other accessories (auxiliary and alarm contacts width 9mm, shunt trip width 18mm), meeting the diverse needs of system control and monitoring.
- Excellent protection performance: High rated breaking capacity (6kA), stable thermo-magnetic release characteristic, effective overcurrent and short-circuit protection, and reliable arc extinguishing performance.
- Easy installation and wiring: Support top and bottom wiring, terminal size suitable for 25mm² cables, easy to install and maintain, improving construction efficiency.
- Customizable services: Supports OEM brand customization, multiple specifications available (different rated current, pole number and voltage), wide application scenarios and high safety performance, meeting personalized customer needs.
Main Technical Parameters
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Parameter
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Details
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|---|---|
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Standard
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GB/T 14048.2; IEC60947-2
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Shell Frame Grade Current
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63A
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Rated Insulation Voltage (Ui)
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500V
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Rated Impulse Withstand Voltage (Uimp)
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4kV
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|
Rated Current (A)
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1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
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|
Rated Voltage
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DC250V(1P), DC500V(2P), DC800V(3P), DC1000V(4P)
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Thermo-magnetic Release Characteristic
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10In±20%
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Number of Poles
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1P, 2P, 3P, 4P
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Unipolar Width
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18mm
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Rated Breaking Capacity
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6kA
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|
Reference Temperature
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30°C
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|
Utilization Category
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A
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Mechanical Life
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20,000 Cycles
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|
Electrical Life
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2000 Cycles
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Protection Degree
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IP20
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|
Terminal Size (Top/Bottom for Cable)
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25mm²
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|
Connection
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From top and bottom
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Why Choose C&J Electrical’s CJMD2-63 Series Dc Circuit Breakers For Solar?
In the field of Dc Circuit Breakers For Solar, the CJMD2-63 series DC MCB from C&J Electrical has obvious competitive advantages, becoming the preferred choice for customers pursuing reliability, versatility and cost-effectiveness:
- Professional customization for new energy: Specially designed for solar and new energy systems, adapting to the DC high-voltage working environment, with excellent arc extinguishing and overcurrent protection performance.
- International standard quality: Complies with GB/T 14048.2 and IEC60947-2 standards, strict quality control, stable and reliable performance, and safe to use in various scenarios.
- Wide versatility and adaptability: Multiple rated current, voltage and pole number specifications, widely applicable to solar, energy storage, communication and other multiple DC power distribution scenarios.
- Flexible configuration: Support accessory expansion, meet the needs of system intelligent monitoring and remote control, and adapt to the development trend of smart solar systems.
- Cost-effective and durable: Compact design, easy installation and maintenance, reusable reset function, reducing maintenance costs; long mechanical and electrical life, ensuring long-term stable operation.
- Customizable services: Supports OEM brand customization, can be adjusted according to customer specifications and brand needs, adapting to the personalized needs of different markets.
- Professional support: C&J Electrical has a professional technical team that can provide customers with tailored Dc Circuit Breakers For Solar solutions and comprehensive after-sales services, solving customers’ worries.
Get in Touch
If you have any questions about the CJMD2-63 series Dc Circuit Breakers For Solar, such as product specifications, technical details, customization needs, or bulk orders, please feel free to contact C&J Electrical. Our professional team will provide you with high-quality DC circuit protection solutions and reliable services to ensure the safe and stable operation of your solar and new energy systems.
Post time: Feb-04-2026