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Power Capacitors
- BY71 Series Cylindrical Capacitor
- BSMJ Series Self-healing Low Voltage Shunt Capacitors
- BY86 Series Controlled Intelligent Capacitor
- BYKXG/F Series Anti-harmonic Intelligent Capacitor
- BY81 Series Intelligent Capacitor
- BY82J Series Anti-harmonic Intelligent Capacitor
- BY89 Series Intelligent Capacitor
- Intelligent Controller Series
- Reactor
- Intelligent Switch Series
- Alternating Current Contactor
- Multifunctional power instruments
- Circuit Breaker
- APF/SVG/SPC Cabinet & Module Series
BYM6 Series DC Solar Factory International Approved 4P 300A Solor PV Breaker Electrical MCCB Circuit Breakers 300A
Main Parameters of BYM6 New Energy Circuit Breaker
| Model | BYM6 New Energy Circuit Breaker |
| Production Level | IP20 |
| Extreme Number | 4P |
| Rated Current In (A) | 300A |
| Rated Ultimate Short-Circuit Breaking Capacity Lcu (kA) O-CO : AC 800V | 36.5kA |
| Rated Impulse Withstand Voltage Uimp (kV) | 12 |
| Rated Operationa Voltage Ue (V) | Up to 1140V |
| Total Breaking Time (without additional delay) (ms) | 12~28 |
| Closure Time (ms) | ≤60 |
| Working Voltage (V) | Up to 1140V |
| Machine Lifespan (times) | 20000 |
| Temperature Protection | All series are equipped with temperature protection |
Introduction of BYM6 New Energy Circuit Breaker
The BYM6 Series 4P MCCB (Moulded Case Circuit Breaker) is a cutting-edge air break circuit breaker engineered to address the demanding protection needs of modern solar PV systems, DC battery circuits, and industrial substations. Designed for high-current DC applications (up to 300A, 1000V DC), this UL, CE, and IEC-certified breaker combines magnetic protection, overvoltage detection, and ground fault protection to ensure unmatched safety and reliability in renewable energy infrastructure.Equipped with a multi-layered protection circuit, the BYM6 safeguards against circuit overloads, over current detection, DCC short circuit protection, and over-temperature faults. Its arc fault breaker tripping with no load feature eliminates false alarms, while the arc fault breaker light on indicator provides instant visual alerts for fault diagnostics. The integrated overvoltage protection of SCR and over/under voltage detection circuit stabilize electricity loads, preventing damage to inverters, PV modules, and DC battery systems. Additionally, the overload protection circuit for inverters and output short circuit protection ensure seamless operation under dynamic grid conditions.
Built with a flame-retardant moulded case and IP65-rated enclosure, the BYM6 excels in harsh environments, offering over-temperature protection and resistance to UV degradation. Its 4-pole design ensures balanced phase management, critical for circuit breakers in substations and large-scale solar farms. Compatible with Schneider Electric DC MCB standards, this breaker supports easy integration with universal MCB lock-off devices and DC MCB Schneider accessories, streamlining installation in hybrid systems.The BYM6 incorporates overcurrent and overvoltage protection circuits to mitigate risks from grid fluctuations, while its magnetic protection circuit breaker technology enables rapid response to overload short circuits (up to 6kA breaking capacity). The low oil circuit breaker-inspired efficiency reduces maintenance needs, and the Dc overcurrent protection circuit optimizes energy flow in PV arrays. For inverters, the overload protection circuit for inverters and output protection circuit prevent downtime caused by over-fused circuits or unstable loads.Ideal for solar farms, utility substations, and DC microgrids, the BYM6 meets global standards for renewable energy circuit protection, including UL 489 and IEC 60947. Its modular design, DIN-rail mounting, and compatibility with short circuit MCB systems make it a versatile choice for engineers prioritizing overcurrent circuit safety and SCR overvoltage protection.
Main Advantages of BYM6 New Energy Circuit Breaker Product
High current capacity and international certification
The BYM6 series is rated at 300A and features a 4P (four-pole) design, tailored for large-scale solar PV systems that require robust protection. The series is certified to IEC, UL, CE and other global standards, ensuring compliance with stringent safety and performance requirements for renewable energy applications.
Advanced protection features for solar systems
Equipped with overload and short-circuit protection, this circuit breaker supports a high breaking capacity of up to 6kA to protect solar arrays from electrical hazards. Its DC 1000V rated voltage meets the requirements of modern photovoltaic systems and can minimize the risk of arc faults and fire.
Strong environmental resistance
With an IP65-rated waterproof and dustproof housing, the BYM6 can withstand harsh outdoor conditions, including extreme temperatures (-20°C to 70°C) and UV exposure. This durability ensures uninterrupted operation in solar farms, rooftops, and off-grid installations.
Intelligent monitoring and remote diagnosis
Integrated PLC communications and IoT fault diagnostics enable real-time monitoring of circuit status. Users can receive alerts of abnormal conditions such as overheating or shading causing inefficiencies, enabling proactive maintenance and optimizing system uptime.
Improve safety with flame retardant materials
The circuit breaker uses a V0-rated flame-retardant composite material to minimize the risk of fire during electrical faults. Its low contact resistance design reduces energy losses, thereby improving the safety and efficiency of solar inverters and energy storage systems.
Flexible application and easy installation
Compatible with residential, commercial and utility-scale PV systems, BYM6 features a compact modular design and tool-free terminal connections. Its 25 mm DIN rail mounting design simplifies integration with existing equipment, reducing labor costs and downtime.
Working Steps of BYM6 New Energy Circuit Breaker Product
Installation and system integration
The BYM6 circuit breaker is DIN rail mounted for seamless integration into solar PV systems. Its 4P (four-pole) design ensures balanced load distribution across phases, which is critical for high voltage DC applications (up to 1000V) in utility-scale solar farms or rooftop arrays. Keywords: Solar PV circuit breaker installation, DIN rail mounted molded case circuit breaker, photovoltaic circuit integration.
Real-time current monitoring
Once connected, the circuit breaker continuously monitors the DC current of the solar panel using a high-precision sensor. It can detect abnormal conditions such as overcurrent surges or voltage imbalance caused by shading, wiring faults, or inverter failures. Keywords: DC current monitoring, solar overload detection, photovoltaic system fault detection.
Triggering protection mechanism
Once a fault is identified (e.g. short-circuit current up to 6kA), the circuit breaker immediately disconnects the circuit to prevent damage to the inverter, battery or PV panels. Its arc extinguishing chamber suppresses DC arcs, a common hazard in solar systems. Keywords: DC arc fault protection, solar circuit interruption, high breaking capacity molded case circuit breaker.
Fault Isolation and System Safety
The V0 flame-retardant housing contains internal electrical fault protection, while the IP65-rated enclosure is dust, moisture, and UV resistant. This dual-layer safety design ensures zero downtime even in extreme outdoor environments. Keywords: Solar circuit breaker fault isolation, weatherproof circuit protection, flame-retardant photovoltaic equipment.
Smart diagnostics and alerts
The integrated IoT communication module transmits real-time data (e.g., temperature, trip history) to a centralized monitoring platform. Users receive instant alerts for issues such as insulation degradation or contact wear, enabling predictive maintenance. Keywords: Smart solar circuit breaker diagnostics, IoT circuit protection, remote PV system monitoring.
Manual reset and maintenance
Once the fault has been resolved, the circuit breaker's ergonomic reset lever allows for quick resetting without disassembly. Its modular design allows for easy replacement of components (e.g. contacts, sensors) to minimize service interruptions.
Size Information of BYM6 New Energy Circuit Breaker Product
Applications of BYM6 New Energy Circuit Breaker
Large-scale grid-connected solar farms
BYM6 Series 4P 300A DC Solar PV Circuit Breaker is a key component of large grid-connected solar farms, where high reliability and precise protection are essential. Designed for high-current DC systems (up to 300A), this molded case circuit breaker protects photovoltaic (PV) arrays, inverters, and grid interconnection points from overcurrent, short circuit, and ground fault. It has passed international certifications such as UL and CE to ensure compliance with global safety standards, making it an ideal choice for solar installations in the United States, Europe, Asia, and other regions.In such power plants, the circuit breaker’s fast tripping mechanism (≤5 milliseconds) minimizes downtime during faults, protects expensive equipment and maximizes power generation. It integrates seamlessly with smart grid infrastructure to enable remote monitoring and predictive maintenance through IoT-enabled sensors. This feature is critical to optimizing operational efficiency of large solar parks, where manual inspection is not possible.In addition, the BYM6 series solves the problem of harmonic suppression by suppressing the high-frequency noise generated by the inverter, ensuring that clean electricity is injected into the grid. Its corrosion-resistant housing and IP65 protection grade casing can withstand extreme weather conditions (such as high desert temperature and coastal humidity), ensuring long-term stable operation in harsh environments.
Commercial and industrial rooftop solar systems
For commercial and industrial (C&I) rooftop solar installations, the BYM6 series provides versatile protection for complex electrical configurations. These systems typically combine three-phase inverters, energy storage units, and variable loads, which present challenges such as voltage fluctuations and phase imbalance. The BYM6 circuit breaker's 4P design ensures balanced load distribution across all phases, mitigating three-phase imbalance issues that can shorten equipment life and increase energy losses.Its selective tripping function enables precise fault isolation, preventing cascading failures in multi-string PV systems. This is critical for industrial and commercial facilities, as downtime directly affects productivity. In addition, the circuit breaker's reactive power compensation function optimizes power factor, reduces utility fines and improves overall energy efficiency.The BYM6 series also supports microgrid integration, seamlessly switching between grid power and on-site solar generation. This is especially important for companies committed to achieving energy independence or complying with net zero emissions requirements. It adopts DIN rail mounting and compact size, which can be easily installed into narrow roof switch cabinets, simplifying retrofit projects.
off-grid and hybrid energy systems
The BYM6 series performs well in harsh, unreliable environments in remote off-grid communities, telecom towers and mobile solar-powered facilities. Its wide operating temperature range (-40°C to +70°C) and shock-resistant design enable it to withstand extreme climates from the Arctic to the tropics. The breaker's DC rating (up to 1500V) ensures compatibility with high-voltage battery packs and energy storage systems (ESS), protecting them from overcharging and thermal runaway.For hybrid systems combining solar, wind and diesel generators, the BYM6 series offers intelligent load management. It dynamically adjusts power flow based on real-time demand, prioritizing renewable energy while ensuring stable power during low-light or windless periods. This adaptability is critical for off-grid applications without grid backup.In addition, the circuit breaker’s arc fault detection technology reduces the risk of fire in DC circuits – a common risk in off-grid systems with limited maintenance. Its modular design allows for easy replacement of faulty components, reducing downtime and operating costs. Keywords: off-grid solar, energy storage protection, hybrid energy system, arc fault detection, remote solar.By integrating these applications, the BYM6 Series positions your brand as a leader in intelligent circuit protection in the renewable energy sector, aligning with the global trend towards sustainable power solutions.
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Workshop Vedio
Baoyu Holding Co., Ltd
Baoyu Holding Co., Ltd. was founded in 2015 and is located in Wenzhou City, Zhejiang Province. The location is excellent and the transportation is convenient. We have very rich industry experience and is a trusted supplier. The company has advanced production equipment and skilled front-line employees. Our company is mainly engaged in the production and sales of power quality products，such as active power filters, static var generators, intelligent capacitors, power capacitors, reactive power compensators, composite switches, capacitor contactors, thyristor switches, reactors. Our company knows that the development of the company depends on the innovation and quality of the products. Therefore, our products have strict quality control from the procurement of raw materials to the sale of finished products. The company has established a quality management system that meets the requirements of the international quality management system. The company continuously releases the original innovations according to the market and customer needs, and always maintains the novelty and innovation of the products. The company wants the customer's thoughts and urgency. Solving problems for customers and meeting customer needs is our eternal pursuit! Our company's products are sold worldwide. The company has won the unanimous recognition of consumers with satisfactory product quality and perfect after-sales service. We have a professional R & D team. We can accept O E M and O D M.We sincerely welcome friends from all over the world to visit our company and cooperate with us on the basis of long-term mutual benefits. We are looking forward to receiving your enquiry soon.
Our storage facility utilizes precision climate control, automated 3D warehousing (which increases capacity by 200%), and integrated safety systems (including fire suppression, anti-static protocols, and monthly audits) to maintain zero oxidation and ensure product integrity. In addition, our cleanroom manufacturing facility features a combination of natural and LED lighting, optimized workflows, and cross-trained technicians to enhance efficiency. Automated quality control systems and ISO-certified processes ensure compliance with dimensional and electrical standards, while AI-driven analytics and stringent protocols help achieve near-zero defects. By integrating advanced automation, tailored solutions, and steadfast reliability, Baoyu provides durable, mission-critical power systems, reinforcing our status as the preferred global partner for industries that require precision and innovation.
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