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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
BY71 0.45-20-3 Series Intelligent Cylindrical 3 Phase Capacitor 450V Low Voltage 20 Kvar Power Capacity
Model meaning
Technical Specfication of BY71 0.45-20-3 Cylindrical Capacitor
| Model | BY71 0.45-20-3 | |
| Rated Working Voltage | 450V | |
| Capacitor Capacity | 314.5μF | |
| Rated Working Current | 25.7A | |
| Loss angle Tangent Value | ≤0.0012 at rated power frequency voltagev | |
| Capacitance Deviation | The discrepancy between the measured value and the rated value of the capacitor shall not exceed 0 to +10%, and the ratio of the maximum to minimum capacitance measured between any two line terminals in a three-phase capacitor shall exceed 1.08. | |
| Withstand Voltage Test | Interpolar | Power frequency 2.15Un, 2S |
| Polar shell | Rated voltage of 600V and below, applied voltage of 3.6kV, 5S | |
| Rated voltage of 600V and below, applied voltage of 7.2kV, 5S | ||
| Maximum Allowable Overvoltage | 1.1Un, not exceeding 8h every 24h | |
| Self Discharge Function | The capacitor is equipped with a discharge device， which can reduce the remaining voltage of the capacitor from 2Un to 75V or below within 3 minutes of disconnecting the power supply | |
| Standards | Equipped with a discharge device, the capacitor can reduce its residual voltage from 2Un to 75V or lower within 3 minutes after the power supply is disconnected. | |
Overview of BY71 0.45-20-3 Series Cylindrical Capacitor
BY71 0.45-20-3 Series Intelligent Cylindrical 3 Phase Capacitor by Baoyu Holdings Ltd. is a premium LV capacitor from the China Smart Capacitor Series, designed to optimize power factor correction and enhance efficiency in three-phase low voltage (450V) electrical systems. Delivering 20 Kvar power capacity, this intelligent capacitor combines a robust cylindrical capacitor design with advanced features like real-time load monitoring, harmonic filter capacitor capabilities, and reactive power compensation to stabilize three-phase power distribution networks. Ideal for three-phase electric factories, commercial facilities, and China AC power 3 phase grids, it minimizes energy losses with low capacitor ESR, ensures reliable performance across AC capacitor voltage fluctuations, and addresses challenges like harmonic distortion and voltage instability. Built with E capacitor-grade materials, explosion-proof casing, and self-healing technology, it guarantees durability in demanding environments while supporting capacitors in circuit synchronization and lighting capacitor applications. As trusted Cylindrical Capacitors Suppliers, Baoyu prioritizes innovation and sustainability, offering a cost-effective solution for three-phase electric service systems, capacitor elec efficiency, and seamless integration into 3 phase electrical systems worldwide. Upgrade your energy management with this AC power capacitor engineered for capacitor working voltage stability and China power of 3 phase excellence.
Main Features of BY71 0.45-20-3 Series Cylindrical Capacitor
1. The shell is made of high-quality anodized aluminum and has a circular design： It is not only easy to install, but also occupies very little space and can flexibly adapt to various installation environments.
2. With unique design concept：the product has excellent environmental adaptability and can operate stably even in places with high ambient temperature and large system voltage fluctuations.
3. Equipped with discharge resistors and safety devices：once disconnected from the power supply, it can effectively prevent the deterioration of accidents. When the internal pressure of the capacitor increases or a fault occurs, the safety device will automatically trigger the corresponding action to ensure the safety of all links during use.
4. Small size and light weight：BY71 0.45-20-3 series intelligent cylindrical three-phase capacitors stand out for their extremely compact size and lightweight design. In the field of power factor correction and reactive power compensation, space is often at a premium. Our capacitors are compact and can be easily installed in crowded distribution cabinets or limited spaces within industrial plants. It does not require extensive structural modifications, saving time and installation costs. Compared with traditional bulky capacitors, their lighter weight simplifies handling during installation and maintenance, minimizing the need for heavy lifting equipment. This feature is particularly important for renovation projects with limited space in existing equipment, which has little room for additional bulky components. The small and lightweight form factor makes it ideal for a variety of applications, from small commercial buildings to large industrial parks seeking efficient reactive power management.
5. Low loss and long life：When it comes to power quality improvement and reactive power compensation, our BY71 0.45-20-3 series smart cylindrical three-phase capacitors are game-changers with their low losses and long life. They use advanced materials and manufacturing processes to minimize energy losses during operation. In the field of reactive power compensation, lower losses mean more efficient use of power, which reduces the end user's electricity bill. Over time, these savings will accumulate significantly. In addition, the long-life design of this capacitor ensures its reliable performance for many years. Whether it is a manufacturing plant with fluctuating loads or a commercial building with stable power demand, it can withstand the rigors of continuous operation in a variety of electrical environments. With a service life that exceeds many competitors, it reduces the frequency of replacement, thereby reducing maintenance workload and related costs.
6. Excellent self-repairing performance and innovative infusion technology：Our BY71 0.45-20-3 series smart cylindrical three-phase capacitors use innovative potting technology to achieve excellent self-healing performance, which is crucial in the field of power capacitors and reactive power compensation. In the event of local dielectric breakdown due to voltage surges or other electrical stress sources, the self-healing mechanism is activated. The potting material reacts to seal micro-perforations or weak points and restore the dielectric integrity of the capacitor. This process occurs automatically without interrupting the overall power supply or manual intervention. In industrial environments that require uninterruptible power supply, such as factories with automated production lines or data centers, this self-healing function minimizes downtime. It safeguards the reactive power compensation process, maintains a stable power factor, and prevents potential failures of sensitive electrical equipment.
8. Dry, environmentally friendly, oil-free：In today's environmentally conscious age, our BY71 0.45-20-3 series smart cylindrical three-phase capacitors provide a sustainable solution for reactive power compensation and power factor correction. As a dry capacitor, it eliminates the need for oil-immersed capacitors commonly found in traditional capacitors. This has multiple advantages. First, it does not have the risk of oil leakage, which avoids the risk of oil leakage polluting the environment and damaging surrounding equipment. In sensitive areas such as water treatment plants or food processing plants, the oil-free design ensures the integrity of the product and meets strict environmental regulations. Secondly, the dry design simplifies disposal at the end of the product life cycle. It does not require special oil removal procedures, thereby reducing waste management costs. In addition, from an operational perspective, dry capacitors are more stable than oil-immersed capacitors under various temperature conditions.
Product Size Information
| Model | M | H | Installation sole |
| BY71 0.45-20-3 | 106mm | 245mm | M16×25mm |
Typical Applications of BY71 0.45 - 20 - 3 Cylindrical Capacitor
1. Industrial manufacturing and heavy machinery
BY71 0.45-20-3 Series Smart Cylindrical Three-Phase Capacitors are an ideal solution for industrial power systems that require advanced reactive power compensation and power factor correction. In manufacturing facilities with heavy machinery, inductive loads such as motors and transformers often reduce the power factor, resulting in energy inefficiency, increased fines from power companies, and voltage instability. This smart cylindrical capacitor dynamically adjusts reactive power to bring the power factor close to 1, thereby reducing line losses and optimizing energy consumption. Its 450V low-voltage design ensures compatibility with standard industrial power grids, while its three-phase capacitor configuration balances the loads on each phase, thereby mitigating three-phase imbalance and harmonics. The embedded intelligent monitoring system provides real-time diagnostics, supports predictive maintenance and minimizes downtime. By integrating this power capacitor into industrial applications, facilities can reduce operating costs, extend equipment life, and comply with grid regulations.
2. Commercial buildings and smart grids
In commercial areas such as office buildings, shopping malls and hospitals, the BY71 series excels in improving energy efficiency and grid stability. These facilities often have low power factors due to fluorescent lights, elevators and air conditioning systems. The capacitor's 450V rated voltage and 20 kvar capacity provide targeted reactive power compensation, reducing utility bills by minimizing kVA demand charges. Its modular design allows for scalable deployment in switch cabinets, while the smart interface enables remote monitoring through IoT platforms, in line with smart grid initiatives. For example, in data centers, where harmonic-rich IT equipment and UPS systems put pressure on the grid, the capacitor ensures that THD (total harmonic distortion) remains below 5%, protecting sensitive electronic equipment. The cylindrical form factor simplifies installation in tight spaces, making it a top choice for retrofitting older buildings.
3. Renewable energy integration and microgrids
Renewable energy systems, such as solar farms and wind turbines, require advanced power capacitors like the BY71 0.45-20-3 series to manage intermittent generation and stabilize grid interaction. Inverter-based renewable energy sources often introduce reactive power imbalances, which can cause voltage fluctuations and power quality degradation. This smart cylindrical capacitor provides fast reactive power compensation, smoothing fluctuations and enhancing grid synchronization. Its 450V rated voltage and three-phase capacitor architecture ensure seamless integration with low-voltage microgrids, while the 20 Kvar power capacity supports efficient energy storage systems. The intelligent control interface enables adaptive load changes, which is critical for hybrid systems combining solar, wind and battery storage. By minimizing three-phase imbalance and harmonic interference, the capacitor ensures compliance with grid regulations and maximizes the return on investment for renewable energy. It is essential for modern microgrids designed for power factor optimization and resilient circuit protection.
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Baoyu Holdings: Empowering smart energy management with innovation
Baoyu Holdings Limited is a leading manufacturer and solution provider of intelligent fully-controlled power quality products and advanced circuit protection systems. We are committed to technological excellence and provide cutting-edge solutions in harmonic suppression, three-phase unbalance correction, reactive power compensation and comprehensive power quality improvement. Our products serve various industries around the world, helping customers optimize energy efficiency, extend equipment life, and ensure operational reliability in harsh electrical environments.
Core products and solutions
Our product portfolio addresses key challenges in modern power systems:
1. Harmonic Mitigation Solutions: Utilizing active harmonic filters (AHF) and passive harmonic filters, we suppress harmonic distortion caused by non-linear loads, ensuring compliance with global standards.
2. Three-phase unbalance correction system: Advanced static VAR generator (SVG) dynamically balances the load and minimizes neutral current and voltage fluctuations to stabilize grid performance.
3. Reactive power compensation: Automatic capacitor banks and SVG-based solutions optimize power factor, reduce transmission losses, and prevent utility fines.
4. Intelligent circuit protection: Our intelligent molded case circuit breakers (MCCBs) and surge protection devices (SPDs) protect equipment from overloads, short circuits and voltage transients.
5. Customized power quality improvement: Customized system integrated with IoT monitoring to achieve real-time analysis, predictive maintenance and energy consumption insights.
Manufacturing Excellence
Leveraging Industry 4.0 practices, our vertically integrated production facilities combine precision engineering with agile manufacturing:
• Automated production lines: Robotic and AI-driven assembly ensures consistent quality of harmonic filters, SVGs, and circuit protection devices.
• Rigorous quality assurance: Three-tier testing protocol (ISO 9001 certified) verifies product durability under extreme conditions, including 100% load endurance testing.
• R&D leadership: A dedicated team of more than 50 engineers focuses on smart grid compatibility, renewable energy integration, and adaptive control algorithms.
Workshop Advantages
Our 120,000 square foot smart factory features:
• Modular production units: Rapid customization for specific applications such as data centers, electric vehicle charging stations, and industrial automation.
• Zero-defect manufacturing: Machine vision systems and thermal imaging eliminate human errors in critical components.
• Sustainable practices: Energy-efficient processes reduce carbon footprint.
Why cooperate with Baoyu?
• End-to-end expertise: From initial power quality audit to turnkey installation, we deliver measurable ROI through reduced downtime and energy savings.
• Global Compliance: Products comply with international certifications, enabling seamless cross-border deployment.
• 24/7 Technical Support: Remote diagnostics and field service teams ensure uninterrupted opvation.
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