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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
BYM5EL Series Residual Current Circuit Breaker (Photovoltaic, Recloser)3 Phases AC 380V RCCB 400A
Main Technical Specifications 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) | 380V |
| Applicable Poles | 4P or 3P+N |
| Rated Residual Operating Current(mA)(l△n) | Up to 10 sets of parameter values customizable according to requirements |
| Rated Residual Non-Operating Current(mA) | 1Δno =50%An |
| Rated Limit Non-Driving Time (s) | Up to 3 sets of parametervalues, customizable according to requirements. |
| Rated Residual Short-Circuit Making(Breaking)Capacity | 1Δm=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 |
Product Overview of BYM5EL Series Residual Current Circuit Breaker
The BYM5EL Series RCCB by BaoYu Holdings is a high-performance Molded Case Circuit Breaker (MCCB) designed for three-phase, four-wire systems (TT networks) in low-voltage electrical networks. Ideal for electrical distribution lines and solar applications, this 4-pole MCCB offers robust protection against grounding faults, overcurrent, short circuits, overvoltage, undervoltage, phase loss, and automatic tripping during power failures. Compliant with GB14048.2 and DL/T20 standards, it ensures reliable circuit breaker performance while providing indirect contact protection against electrical shock hazards.Engineered for MCCB with LSIG protection, this 3-phase MCCB supports 400V systems and integrates seamlessly with Siemens MCCB Configurator-compatible setups. Tested by the Low Voltage Electrical Appliance Research Institute (CEPRI) for communication protocols and validated via the State Grid Zhejiang Province Company’s authorized consistency tests, it guarantees compliance with electrical circuit breaker safety and communication standards.Key applications include power breaker systems, MCCB electrical infrastructure, and circuit breaker testing environments. Whether upgrading MCCB 400A Schneider-based networks or deploying durable MCCB in electrical projects, the BYM5EL Series ensures enhanced reliability for industrial, commercial, and photovoltaic installations.
Function Features of BYM5EL Series Residual Current Circuit Breaker
High-Precision Fault Detection & Auto-Reclosing for Photovoltaic Systems
Designed specifically for photovoltaic applications, the BYM5EL RCCB delivers advanced DC/AC residual current detection (adjustable 30mA-1000mA range) to identify risks such as PV panel leakage, insulation degradation, or arc faults. Its integrated auto-reclosing mechanism automatically restores power after transient faults, minimizing downtime and manual intervention for solar farms and grid-tied systems.
Multi-Protection & Extreme Environment Adaptability
Combines magnetic-thermal tripping technology with high sensitivity to guard against overloads, short circuits, ground faults, and arc hazards. Compliant with IEC 60947-2 and GB/T 14048.2 standards, it offers a 10kA breaking capacity. The IP55-rated enclosure withstands harsh conditions (-25°C to +70°C), ideal for desert, coastal, or industrial PV installations.
Smart Communication & Remote Monitoring Integration
Equipped with Modbus RTU/RS485 interfaces, this RCCB seamlessly integrates with Energy Management Systems (EMS) for real-time data transmission on leakage currents, fault types, and breaker status. Optional audible/visual alarms enable rapid on-site diagnostics, supporting predictive maintenance for solar arrays and smart grids.
Compact Design & Cross-Application Compatibility
Featuring a modular, space-saving design (72mm width) for DIN rail mounting, it optimizes PV distribution cabinet layouts. Compatible with TT/TN-C/TN-S grid configurations, it serves residential, commercial, and energy storage systems. Expandable with external modules for coordinated protection with fuses/contactors.
Application Fields of BYM5EL Series Residual Current Circuit Breaker
Photovoltaic (PV) Energy Systems：Ensures ground fault protection and arc fault detection in solar farms by instantly interrupting residual currents caused by insulation degradation or DC/AC circuit imbalances. Its auto-reclosing capability minimizes downtime by restoring power after transient faults (e.g., lightning surges), enhancing system uptime and energy yield.
Industrial Power Distribution Networks:Mitigates leakage currents and phase imbalances in three-phase AC400V industrial grids, preventing equipment damage and electrical fires. It integrates harmonic suppression to stabilize power quality, ensuring compliance with IEC 61000-3-2 standards for sensitive machinery.
Smart Grids and Microgrids:Enables self-healing grid resilience by isolating faults (e.g., voltage sags) and automatically reclosing circuits within milliseconds. Supports IoT integration for real-time monitoring of residual current thresholds, optimizing energy distribution in decentralized grids
Products Size Informations
All Kinds of Protection, Everything Available Multifunctional Security Protection
PV-Specific Adaptive Protection：Engineered for photovoltaic applications, its dynamic reclosing function automatically restores circuits after transient faults (e.g., lightning surges), while blocking reclosing during permanent faults like insulation failures. Combined with three-phase imbalance compensation, it enhances grid reliability by 30% in solar farms, aligning with IEEE 1547 standards for renewable energy integration.
Real-Time Smart Monitoring & Fault Diagnosis:The BYM5EL Series integrates real-time current operating parameter tracking (voltage, current, residual current), enabling users to instantly diagnose grid anomalies. Its advanced system stores 12 event records and 10 historical fault logs, including fault types (e.g., overcurrent, arc faults), precise action values, and timestamps. This photovoltaic circuit protection feature accelerates root-cause analysis by 40%, minimizing downtime in smart grid and energy management systems.
RS485 Communication with Customizable Protocols:Equipped with a programmable RS485 interface (4.8KBPS–38.4KBPS adjustable rate), the breaker supports seamless integration into IoT-based power distribution networks. Compatible with Modbus RTU and custom protocols, it ensures interoperability with SCADA systems and smart metering infrastructure, laying the foundation for predictive maintenance and remote grid optimization.
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Production workshop
Workshop Vedio
BaoYu Holdings Co., Ltd. - Power Quality Solutions Leader
BaoYu Holdings Co., Ltd. is a globally recognized high-tech enterprise specializing in smart grid solutions, harmonic filters, reactive power compensation systems, and intelligent circuit protection devices. With over a decade of expertise, we deliver cutting-edge technologies to optimize energy efficiency, mitigate harmonic distortion, and ensure stable power distribution for industrial, commercial, and renewable energy applications worldwide. Our state-of-the-art manufacturing facilities integrate advanced R&D capabilities and rigorous quality control systems. Collaborating with top-tier universities like Zhejiang University and Shanghai Jiao Tong University, we innovate next-generation solutions such as active power filters (APF), static var generators (SVG), and smart capacitors. Equipped with intelligent digital testing equipment and patented technologies, our production lines adhere to international standards, ensuring precision and scalability for diverse client needs.
Product Excellence
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Harmonic Mitigation & Power Quality Improvement: Our APF and SVG systems eliminate harmonic interference, reduce energy losses, and enhance grid reliability, ideal for factories, solar/wind farms, and heavy industries.
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Reactive Power Compensation: Customizable solutions address voltage fluctuations and three-phase imbalances, boosting energy efficiency by up to 30%.
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Smart Circuit Protection: Intelligent capacitors and hybrid compensation devices feature real-time monitoring, remote control, and fail-safe mechanisms, minimizing downtime.
Global Market Leadership
With products certified for international markets, BaoYu serves clients across North America, Europe, Southeast Asia, and the Middle East. Our localized technical support teams and partnerships with regional distributors ensure rapid response and tailored adaptations to meet local grid standards. By participating in global trade expos and leveraging digital marketing strategies, we strengthen our footprint in emerging markets like renewable energy and smart infrastructure.
Why Choose BaoYu?
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Engineer-Driven Innovation: Harnessing China’s "engineer dividend," we combine cost-efficiency with world-class R&D to deliver competitive pricing without compromising quality.
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Sustainable Solutions: Aligning with global green initiatives, our products reduce carbon footprints and operational costs through energy-saving technologies.
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Proven Track Record: Trusted in critical projects across ports, airports, and mining sectors, our systems demonstrate long-term reliability under extreme conditions
Business license
High-tech enterprise certificate
ISO management system certification
Corporate honors
Product certification certificate
Product testing report
Company patent certificate
Well-known domestic partners
