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Power Capacitors
- BY71 Series Cylindrical Capacitor
- BSMJ Series Self-healing Low Voltage Shunt Capacitors
- BY86 Series Controlled Intelligent Capacitor
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- BY81 Series Intelligent Capacitor
- BY82J Series Anti-harmonic Intelligent Capacitor
- BY89 Series Intelligent Capacitor
- Intelligent Controller Series
- Reactor
- Intelligent Switch Series
- Alternating Current Contactor
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- Circuit Breaker
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BYM5EL Series Residual Current Circuit Breaker (Photovoltaic, Recloser) 400V 4 Phases MCCB
Main Specification of BYM5EL Series Residual Current Circuit Breaker
| Model | BYM5EL Series Residual Current Circuit Breaker |
| Frame Rated Current (lnm) (A) | Customized according to user requirements |
| Rated Current (ln)(A) | 0.4-1.0lnm (A) Continuously adjustable |
| Auxiliary Power Voltage (Ue) (AC V) | 400 |
| Applicable Poles | 4P |
| Rated Residual Operating Current(mA)(l△n) | Up to 10 sets of parameter valuescustomizable according to requirements. |
| Rated Residual Non-Operating Current(mA) | I△no =50%l△n |
| Rated Limit Non-Driving Time (s) | Up to 3 sets of parameteralues, customizable according to requirements. |
| Rated Residual Short-Circuit Making (Breaking) capacity | I△m=lcu(kA) |
| Time Delay Recloser Time (s) | 20-60 |
| Overvoltage Tripping Value (V) | Default 275+5% (Adjustable) |
| Undervoltage Tripping Value (V) | Default 165+5% (Adjustable) |
| Phase Loss Tripping Value (V) | Default 120+5% (Adjustable) |
| Operating Characteristics Classification | Ac type |
| Product Usage Category | Class B |
Introduction to BYM5EL Series Residual Current Circuit Breaker
The BYM5EL Series is a cutting-edge Smart Breaker designed for robust Circuit Protection Equipment in Power Electrical Systems, particularly tailored for Photovoltaic applications and Low Voltage Breakers networks. Ideal for Three-Phase and four-wire systems with directly grounded neutral points (TT) in Low Voltage electrical networks, this Main Power Circuit Breaker ensures comprehensive protection against grounding faults, overcurrents, Short Circuit Breaker events, overvoltage, undervoltage, and phase loss due to power failure. Its advanced auto-reclosing functionality minimizes downtime by automatically restoring power after transient faults, making it a reliable Recloser Circuit Breaker for critical infrastructure like Power Distribution Lines and Circuit Breaker in Substation setups.Engineered to meet stringent safety standards, including GB14048.2 and DllT20, the BYM5EL Series provides indirect contact protection against electrical shock hazards, safeguarding both circuits and equipment. It has been rigorously tested by the Low Voltage Electrical Appliance Research Institute of China Electric Power Research Institute for communication protocol compliance and certified by the State Grid Zhejiang Province Company, ensuring seamless integration into smart grids and Inverter Protection Circuit systems.Key applications include 3 Phase in Residential complexes, industrial Motor Protection systems (compatible with solutions like Miniature Circuit Breaker Schneider), and renewable energy installations requiring Photovoltaic Circuit Breaker reliability. Whether deployed as a Main Circuit Breaker or a specialized component in AC in Low Voltage networks, the BYM5EL Series delivers unmatched performance, durability, and compliance with global electrical safety norms.
Working Principle of BYM5EL Series Residual Current Circuit Breaker
1. Advanced Protection Mechanism for Photovoltaic Systems
The BYM5EL Series integrates residual current detection and automatic circuit interruption to safeguard photovoltaic (PV) systems from electrical faults. Utilizing a zero-sequence current transformer, it continuously monitors current imbalance between phases and neutral. If a leakage current exceeds the preset threshold (e.g., due to insulation failure or ground faults), the circuit breaker instantly trips, disconnecting the PV array from the grid to prevent fire hazards and equipment damage. Designed for solar applications, it also addresses unique challenges like DC arc faults and transient overvoltages, ensuring compliance with photovoltaic circuit protection standards.
2. Intelligent Auto-Reclosing for Enhanced Grid Reliability
Equipped with auto-reclosing functionality, the BYM5EL Series minimizes downtime in PV installations. After tripping due to transient faults (e.g., temporary overloads or voltage fluctuations), it automatically attempts to restore power once predefined conditions are met, such as a stable current flow or elapsed recovery time. This feature is critical for recloser circuit breakers in renewable energy systems, where manual intervention is impractical1214. The four-phase MCCB design further ensures balanced load distribution, mitigating three-phase imbalances and optimizing grid stability.
3. Comprehensive Circuit Protection and Smart Monitoring
Beyond overload and short-circuit protection, this breaker integrates residual current protection (RCCB) and arc fault detection to address both safety and power quality. Its modular architecture supports customizable settings for fault thresholds, delay times, and reclosing cycles via an embedded microprocessor. Real-time monitoring of parameters like leakage current, load status, and fault history enables proactive maintenance, reducing operational risks in smart grid environments. Compatible with RS-485 communication, it facilitates remote control and integration into energy management systems, making it ideal for large-scale PV plants requiring circuit protection and grid. resilience.
BYM5EL Series Residual Current Circuit Breaker Product Features
- BYM5EL Series Residual Current Circuit Breaker has a small volume and integrates a leakage circuit breaker, a leakage circuit breaker, and an AC contactor into one, reducing the installation space and simplifying the wiring.
- BYM5EL Series Residual Current Circuit Breaker adopts a microprocessor-based intelligent digital programming control circuit, and all functions are completed by the single-chip microcomputer program.
- Automatically display the residual current value of the circuit, trip in case of fault leakage, and display the residual current value at the time of tripping.
- The intelligence not only has the protection functions of leakage, undervoltage, overvoltage, phase loss, overcurrent, and short circuit, but also has the characteristics of intelligent leakage protection. Mainly, it includes the digital display of the leakage current, automatic reclosing, and indication of the action status. In addition, different breaking times and rated leakage current action values can be set, and the leakage values of phase A, phase B, and phase C can be displayed separately. When the three-phase leakage is unbalanced, the vector sum of the three-phase leakage current can be displayed. With vector protection, when the current imbalance of the three-phase line reaches an appropriate value, the protection function will be activated.
- BYM5EL Series Residual Current Circuit Breaker can automatically memorize operation data, such as the number of closing operations, the total number of closing operations, the number of electric closing operations, the number of reclosing operations, the number of tripping operations, the number of slow-variation tripping operations, the number of over-limit tripping operations, the number of sudden-variation tripping operations, the number of electric tripping operations, the number of sensitive operations, the number of manual tripping operations, the number of abnormal voltage tripping operations, and the number of abnormal power frequency operations. It can distinguish the main causes of actions and record the data of the latest ten operations, such as slow-variation tripping operations, over-limit tripping operations, sudden-variation tripping operations of phase A, sudden-variation tripping operations of phase B, sudden-variation tripping operations of phase C, electric tripping operations, manual tripping operations, abnormal voltage tripping operations, and abnormal power frequency operations.
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BYM5EL Series Residual Current Circuit Breaker has three-level lightning protection technology to eliminate the blind area that may be damaged by lightning.
With the full-automatic tracking technology, it can automatically track and calculate the residual current action value according to the actual leakage of the power grid, improving the operation safety of the power grid. - BYM5EL Series Residual Current Circuit Breaker reserves a computer communication interface and can realize the automated management of the power grid according to the user's requirements.
Product Size Information
Good Quality Starts With Details
Advanced Photovoltaic-Specific Protection:Designed for solar energy systems, the BYM5EL integrates AC residual current detection and arc fault protection, ensuring seamless compatibility with photovoltaic arrays. Its 3-phase MCCB architecture supports high-voltage applications up to 400V, addressing unique challenges like solar panel surges and grid instability while maintaining compliance with international standards for photovoltaic circuit. protection
Comprehensive Multi-Hazard Protection：Combines overcurrent protection, earth-leakage detection, and short-circuit interruption in a single compact unit. The 3-pole design provides balanced phase monitoring, critical for managing three-phase imbalances and harmonic distortions in photovoltaic systems. Built with fire-resistant materials and an IP65-rated enclosure, it excels in harsh environments.
Smart Reclosing Functionality for Minimal Downtime：Equipped with an intelligent reclosing motor, this breaker automatically restores power after transient faults (e.g., temporary overloads or voltage fluctuations), reducing manual intervention and operational disruptions. Its self-diagnostic feature ensures safe reclosing only when residual currents are within safe thresholds, enhancing reliability in renewable energy installations and industrial grids.
BYM5EL Series Residual Current Circuit Breaker Application Scenarios
Electric power system Road construction Distribution equipment
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Baoyu Holding Co., Ltd.
Baoyu Holding Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and distribution of power quality solutions, with a core focus on reactive power compensation and harmonic governance. Established in China, the company operates from its headquarters in Wenzhou Bridge Industrial Zone, Yueqing City, Zhejiang Province, and has cultivated a global market presence, exporting products to over a dozen countries in Europe, North America, Southeast Asia, and the Middle East.
The company’s flagship products include active power filters, static var generators (SVG), hybrid reactive power compensation devices, intelligent capacitors, and DTU smart power distribution terminals, which are widely applied in industries such as factories, petrochemical plants, mining, metallurgy, shipbuilding, airports, and renewable energy systems (e.g., solar and wind power). These solutions address critical challenges in power systems, including harmonic distortion and reactive power inefficiencies, ensuring stable and efficient energy management for large-scale infrastructure projects.
Leveraging advanced R&D capabilities, Baoyu collaborates closely with leading academic institutions such as Shanghai Jiao Tong University, Zhejiang University to innovate cutting-edge technologies. Its modern R&D centers and intelligent digital testing facilities support the development of patented products that meet stringent international standards18.Committed to providing holistic solutions, Baoyu emphasizes continuous technological refinement and production optimization, positioning itself as a trusted partner for customized power quality management worldwide19. With certifications and accolades underscoring its expertise, the company exemplifies innovation and reliability in the electrical equipment industry.
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High-tech enterprise certificate
ISO management system certification
Corporate honors
Product certification certificate
Product testing report
Company patent certificate
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