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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 Moulded Case Circuit Breaker Solar Photovoltaic PV MCCB DC Circuit Breaker Industrial MCCB Current Electric Earth Leakage
Main Specifications of BYM6 New Energy Circuit Breaker
| Model | BYM6 New Energy Circuit Breaker |
| Production Level | IP20 |
| Extreme Number | 4P |
| Rated Current In (A) | 800A |
| 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 |
Product Introductions of BYM6 New Energy Circuit Breaker
The BYM6 Series Moulded Case Circuit Breaker (MCCB) by Baoyu Holdings Ltd. is a state-of-the-art Air Break Circuit Breaker engineered to deliver unmatched safety and reliability in solar photovoltaic (PV) systems, DC battery circuits, industrial substations, and renewable energy grids. Designed as a robust alternative to traditional Low Oil Circuit Breaker solutions, this MCCB 4 Pole integrates cutting-edge technologies to address modern challenges like circuit overload, overvoltage detection circuit failures, and arc fault breaker tripping with no load. Its moulded case construction ensures durability in harsh environments, while its intelligent protection mechanisms meet global standards for ground fault protection, DC overcurrent protection circuit precision, and output short circuit protection.
As a photovoltaic-specific circuit breaker, the BYM6 excels in solar PV systems, where it manages electricity load fluctuations and prevents over current circuit hazards. It incorporates DCC short circuit protection to isolate faults in DC microgrids and overvoltage protection of SCR (silicon-controlled rectifiers) to shield inverters from voltage spikes. For DC battery circuit breaker applications, its magnetic protection circuit breaker mechanism ensures rapid interruption during overload short circuit events, while its over temperature protection circuit prevents thermal runaway in energy storage systems. Compatible with Schneider Electric DC MCB configurations, it supports seamless integration into hybrid grids requiring over and under voltage protection circuit stability.The BYM6 Series combines air circuit breaker reliability with smart diagnostics, including an arc fault breaker light on alert for real-time fault detection. Its overcurrent detection circuit monitors over fused circuit risks, while the overvoltage and overcurrent protection circuit dynamically adjusts to grid anomalies. The overload protection circuit for inverter systems ensures longevity in solar farms, and the universal MCB lock-off device enhances maintenance safety. Built with molded MCB precision, it also addresses short circuit MCB scenarios in industrial settings, offering output protection circuit resilience for machinery and circuit breaker in substation deployments.
Main Functions BYM6 New Energy Circuit Breaker Product
High-performance DC protection for solar photovoltaic systems
Designed for solar photovoltaic applications, the BYM6 series ensures reliable DC circuit interruption and protects photovoltaic arrays from overload, short circuit and arc faults. Designed specifically for photovoltaic applications, it minimizes energy losses and increases the safety of renewable energy installations.
Powerful over-current and short-circuit protection
Designed to handle high DC voltages (up to 1500V) and industrial-grade currents, the MCCB provides accurate overcurrent protection and fast short-circuit tripping to safeguard critical equipment in industrial and renewable energy systems.
Advanced leakage detection
Integrated earth leakage protection detects and interrupts ground faults, preventing electrical hazards and equipment damage. This feature is critical for industrial molded case circuit breaker applications that need to meet stringent safety standards.
Enhanced durability in harsh environments
Made of UV-resistant materials and a rugged casing, the BYM6 series can withstand extreme temperatures, humidity and mechanical stress, making it ideal for solar farms, industrial plants and outdoor installations.
Intelligent thermal management
Leveraging dynamic thermal monitoring to prevent overheating and thermal runaway is a critical feature for energy storage systems and battery management in renewable energy settings1.
Modular design, easy to maintain and expand
The modular molded case circuit breaker (MCCB) architecture enables quick component replacement and seamless integration into an expanding solar or industrial grid. This not only reduces downtime, but also supports scalable circuit protection solutions to meet changing energy needs.
Working Principle of BYM6 New Energy Circuit Breaker Product
1. Double-acting tripping mechanism for overcurrent and short-circuit protection
The circuit breaker uses a precision calibrated thermal-magnetic trip device to monitor the current.Thermal protection: The bimetallic strip heats up in an overcurrent condition (e.g. sustained overload), bending and triggering a mechanical trip, breaking the circuit.Magnetic protection: The solenoid coil generates instantaneous magnetic force in the event of a short circuit fault, which can be interrupted quickly (<20ms) to prevent equipment damage.
2. Arc Fault Detection and Suppression in Photovoltaic Systems
For solar PV applications, BYM6 integrates arc fault detection technology (AFDD) to identify dangerous DC arcs caused by damaged cables or loose connections.Use highly sensitive sensors to detect unstable current waveforms and UV/IR radiation.Minimize fire risks in renewable energy systems by triggering instantaneous arc extinction through high-speed DC interruption.
3. Ground fault monitoring and leakage protection
The built-in earth leakage relay continuously measures the current imbalance between phase and neutral.Detecting ground faults (such as insulation faults) as low as 30mA is critical to human safety and equipment integrity.Activates the shunt trip mechanism to isolate the faulted circuit, ensuring compliance with IEC 60947-2 and UL 489B standards.
4. Dynamic DC voltage handling for solar power and energy storage
Designed for high voltage DC systems (up to 1500V), BYM6 uses double-break contact technology to address the unique challenges of DC interruption:DC Arc Extinguishment: The magnetic blow-out coil stretches and cools the arc, ensuring a clean separation of the circuit.Reverse polarity protection: prevents damage caused by incorrect PV array wiring or battery bank configuration.
5. Intelligent thermal management and self-diagnosis
Embedded microprocessor based control unit enhances reliability:Thermal Monitoring: Tracks ambient temperature and load profiles to prevent thermal overload in harsh environments.Self-Test: Automatically verifies trip functionality and connectivity, reducing maintenance downtime.
6. Modular design, scalable integration
Modular architecture allows seamless upgrades:Interchangeable trip units and accessories, such as communication modules, allow adaptation to changing grid needs.Supports integration with Energy Management Systems (EMS) for real-time monitoring in smart grid and Industrial IoT settings.
Size Information of BYM6 New Energy Circuit Breaker Product
Manufacture High - Quality Products With Dedication
Intelligent arc fault detection with predictive analysis
The BYM6 series integrates AI-driven arc fault detection technology, using multi-sensor fusion (current, voltage and temperature) to identify early faults with 99.8% accuracy. Unlike traditional molded case circuit breakers that rely solely on thermal magnetic tripping, this circuit breaker uses machine learning algorithms to distinguish between normal transients (such as inverter switching) and dangerous arcs, reducing false tripping by 70% compared to industry standards. This feature is critical for solar PV circuit breakers, as arc faults are the leading cause of DC array fires.The circuit breaker’s Smart Trip Unit (STU) supports remote configuration via Modbus RTU/TCP and MQTT protocols, enabling real-time monitoring of parameters such as residual current, phase imbalance, and power quality indicators. Users can set custom trip thresholds and receive predictive maintenance alerts through the BYM cloud platform. The platform analyzes historical data, predicts component wear (such as contact corrosion), and recommends proactive replacement plans. This predictive analysis capability is particularly important for large grid-connected solar farms, where downtime costs exceed $1,000 per minute.In addition, the STU integrates harmonic filtering to mitigate voltage distortion caused by the inverter, ensuring compliance with standards. Its adaptive reactive power compensation function dynamically optimizes the power factor (PF ≥ 0.99), thereby reducing utility fines and improving the energy efficiency of commercial and industrial (C&I) solar systems.
High purity copper alloy conductor, corrosion resistant shell
BYM6 Series DC Solar PV Molded Case Circuit Breakers feature 99.99% oxygen-free copper alloy conductors with low resistivity and excellent thermal conductivity, ensuring minimal energy loss in high-current DC systems (up to 300A). This material selection is critical for solar PV circuit breakers as it maintains efficiency under extreme loads in utility-scale power plants or industrial rooftop facilities. The copper conductors are housed in an IP65-rated polycarbonate housing and coated with a two-component epoxy-polyester powder coating to provide protection against UV rays, salt spray, and chemical corrosion in harsh environments such as coastal solar arrays or desert solar parks.The housing’s silicone rubber gasket provides a seal against dust and moisture, preventing condensation-induced failures in hybrid energy systems with battery storage. Additionally, key components are made of flame-retardant materials that meet UL 94 V-0 standards, reducing the risk of fire in DC circuits susceptible to arc faults. This rugged construction ensures a service life of more than 20 years in outdoor applications, meeting the circuit protection needs of remote off-grid systems with limited maintenance.
Modular plug-and-play architecture allows for scalable installation
The BYM6 series features a modular design that enables on-site custom configuration, making it ideal for scalable solar PV and energy storage projects. Its plug-in terminal blocks allow for quick replacement of faulty components (e.g., trip units, auxiliary contacts) without disconnecting the entire circuit - this is critical for rooftop solar systems, as a failure would interrupt business operations. The circuit breaker supports DIN rail mounting and side-by-side mounting, maximizing space efficiency in compact switch cabinets.
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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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