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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 0.45-15-3 Series High-Quality Intelligent Cylindrical 3 Phase Capacitor 450V Low Voltage
Model meaning

Capacitor Main Technical Specfication
| Model | BY71 0.45-15-3 | |
| Rated voltage | 450V | |
| Capacitor Capacity | 235.9μF | |
| Rated Current | 19.2A | |
| Loss angle tangent value | Not exceed 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 | |
| Meeting 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. | |
BY71 0.45-15-3 Series Cylindrical Capacitor overview
Engineered to Improve Power Quality and optimize Electric Power Energy management, the BY71 0.45-15-3 Series 450V cylindrical capacitor combines advanced Capacitor Component technology with a robust three-phase design. Inside A Capacitor, high-performance dielectric materials ensure efficient energy storage and voltage stabilization, directly addressing the Capacitor Effect on Voltage by regulating fluctuations and enhancing Power Quality Factor in industrial grids. Precision-calibrated for seamless Phase of Capacitor alignment, this cylindrical capacitor minimizes reactive power losses, mitigates harmonic distortions, and counters Static Electricity Capacitor risks in high-voltage environments. Its Electrical Capacitor Function extends to applications like renewable energy systems, HVAC, and industrial machinery, where it stabilizes voltage levels, boosts energy efficiency, and supports compliance with global safety standards. Designed for durability and compact Power Capacitor Installation, the BY71 Series delivers reliable performance in harsh conditions, ensuring longevity, reduced downtime, and cost-effective Electric Power Energy solutions. Trust Baoyu Holdings’ expertise in redefining how cylindrical capacitors enhance grid reliability, Capacitor Increase Voltage stability, and sustainable power management worldwide.

The main structure of a cylindrical capacitor

Self-healing Technology
- The dielectric used in our capacitors has self-healing function:Once voltage breakdown occurs, the metal conductor layer will generate high heat, so that the metal conductor around the breakdown point quickly evaporates and escapes. These escaped metal conductors are displaced within a few microseconds, and is blown out of the breakdown area under the action of pressure at the center of breakdown point, so an insulating area is formed. During and after the breakdown occurs, the capacitor can still work normally. The loss of capacitor caused by self-healing is less than 100pF, which means that the degree of loss can only be verified through precise measuring instruments.
G Discharge Resistor Module
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The capacitors equipped with a discharge resistor module to ensure that the capacitor terminal voltage drops below 50V within 50s after the capacitor is powered off.
Over-voltage Separation Protection Device G In the event of over-voltage or near the end of service life of capacitor, the increasing"self-healing" damage will lead to increase in the internal pressure of the capacitor. In order to prevent them from bursting suddenly, we design a"pressure relief structure" on the cylindrical aluminum can of the capacitor.This safe structure is designed as a weakened point in the internal connection of capacitor. The top of the capacitor is pushed up by pulling apart the pleated part, so as to achieve the purpose of pressure relief.Meanwhile, the metal wire connected to the top is also broken by pulling due to the rise of top,which effectively impedes the flow of current and prevents explosion of capacitor due to overload and overheating.
G 200,000 Hours of Working Life
- By using special high vacuum technology and long-term drying and dehumidification process,the capacitor is filled with environmentally-friendly insulating gas. After the shell is filled with protective gas and then sealed, stringent gas leak test is conducted. This complex process avoid select rode oxidation and partial discharge(corona discharge),ensuring that the capacitor has excellent capacitance stability and long service life.
Product features
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BY71 0.45-15-3 cylindrical capacitors are made with an aluminum cylindrical casing of higher quality, smaller in size, and more beautiful in appearance. The bolts at the bottom serve as both installation and grounding bolts, providing convenience for you. A unique bolt connection method is employed to ensure the connection is tighter and more reliable. Protection measures are in place to ensure your safe operation without possibility of injury.
- BY71 0.45-15-3 cylindrical capacitors are widely used for improving power factor in power systems. These capacitors are useful in several aspects for on-site compensation of inductive equipment such as motors and transformers, electric traction locomotives, UPS systems, and power system harmonics filtering.
- In BY71 0.45-15-3 designs, entirely bolt outlet structure with more reliable connection guarantees that contact resistance at the connection is minimized with subsequent heat being minimized.
- In designing an explosion-proof structure, BY71 0.45-15-3 cylindrical capacitors utilize the American explosion-proof design with modifications; our credible explosive-proofing has led to 100% success in testing. They lend easy and safe installation, increasing work efficiency; their gracious contours induce an electrification of industrial production and boast the lively image of the finished product, allowing for perfect replacement of foreign imports; through enhanced lifetime, safety, and reliability, the product comprehensively fulfills high standards set by the customers; hence, incorporation leads to the maximization of customer value.

Installation Precautions

General Requirements:
- The capacitor should be installed indoors and used at an elevation below 2000 meters.
- The ambient air temperature during operation should be between -25℃ and +50℃, with humidity levels below 85%.
- Note: Products can be customized for low-temperature environments ranging from -40℃ to +50℃.
Installation Environment:
- The installation site should not be exposed to direct sunlight or be soaked in rain.
- Avoid locations with excessive dust and intense vibrations.
- Maintain a minimum distance of 30mm between capacitors.
Ventilation and Heat Dissipation:
- During high ambient temperatures in summer, effective measures should be taken to ensure proper ventilation and heat dissipation.
Electrical Considerations:
- Before installation, thoroughly consider factors related to high voltage increases caused by capacitor input to prevent prolonged operation under overvoltage conditions.
- Pay attention to detecting voltage waveforms and network characteristics before installing capacitors.
- If harmonic sources are present (e.g., large rectifiers, frequency converters, intermediate frequency furnaces), take appropriate measures to limit harmonic intensity.
Induction Motor Connection:
- When connecting a capacitor in parallel with an induction motor, it is advisable to select a distribution container based on the capacitor current being less than 90% of the motor’s no-load current.
Wiring:
- Use flexible copper wire for connections at the capacitor line terminals and grounding terminals, ensuring good contact.
- Regularly inspect the capacitor wiring terminals to prevent damage caused by poor contact.
Safety Precautions:
- The time interval between capacitor removal and re-operation should be greater than 3 minutes (self-discharge time) to avoid high overvoltage that may damage the capacitor.
Product size information

| Model | M | H | Installation sole |
| BY71 0.45-15-3 | 96mm | 245mm | M16×25mm |
Choosing Baoyu means choosing high quality

Cylindrical capacitor uses a corrosion-resistant metal shell with good corrosion resistance, which is able to resist moisture, chemicals, and oxidation in the environment, thus extending the capacitor's service life. The metal casing is not only aesthetic and elegant, which contributes to the overall surface quality of the product, but also contributes to good mechanical strength, thus making sure that the capacitor remains firm and stable under various working conditions. With the anti-corrosion property of the metal casing, it is unnecessary for it to undergo any additional painting, which minimizes the processes and costs associated with production. Environments will not be polluted or any additional maintenance problems arising from the painting process. That kind of design will make the cylindrical capacitor good in performance and aesthetics in the long term, which will sustain its application even in harsh situations.

There are numerous benefits to having cylindrical capacitors mounted to terminal blocks. First, the terminal blocks supply a more stable mechanical connection capable of ensuring that the capacitor functions against vibrations and shocks within its operational environment, therefore reducing the risk of failure due to loosening. Second, with quick terminal design, capacitor installation and removal become quite easy, thus allowing users to quickly put together or service their circuits, thereby optimizing work efficiency. In addition, the mounting terminals have very good conductivity, which helps to reduce effectively the contact resistance, thus improving overall capacitor performance and reliability. Further, cylindrical capacitors with mounting terminals allow more flexibility to the circuit layout, enabling a more compact design and optimized space utilization to meet different application requirements. Finally, the terminals' insulation design provides added safety for the capacitor, preventing short circuits and leakage while lending to the steady operation of the equipment.

The design of cylindrical capacitors with terminal blocks confers several advantages. First, terminal blocks are a more reliable and steady connection; thus, they are capable of reducing poor connection problems such as those caused by vibration or temperature change. Second, with terminal design, capacitors are easy to install and replace; further, the connection or disconnection of power supply comes easily to the users, therefore saving maintenance time. In addition, terminal blocks would further reduce electric field strength inside the capacitor, improve its voltage resistance and safety, and increase its life span. Finally, the introduction of terminal blocks for cylindrical capacitors provides greater scope for the circuit design, which makes it easy to cater to various wiring requirements and applications.
Application scenarios of cylindrical capacitors

Renewable energy systems industrial equipment power systems
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Workshop Vedio
Baoyu Holding Co., Ltd. is an all-around company working on the world stage. With core competencies and the technical aspect of power quality product research, development, and production, plus international engineering sales in cylindrical power capacitors, active power filters (APF), reactors, and static var generators (SVG), the company is an international player. With international perspectives and an efficient supply chain, the company's products now find acceptance in over 50 countries and regions across global markets like Europe, America, Southeast Asia, and the Middle East. With outstanding quality and customized services, it has become a partner of choice among global customers.
Intelligent Storage Workshop:
- Spread out over current warehouse centers, adopting the environment of the intelligent warehouse management system ensuring accurate sorting of goods, real-time inventory workings with dynamic control of temperature and humidity for safe storage circulation of raw materials and finished products ever since.
- ISO supply chain security certification has been achieved, and it has been offering bonded warehousing services supporting one-stop cross-border logistics for customers with "zero-delay" delivery requirements.
Lean Production Workshop:
- It has introduced fully automated production lines and digital control systems and works on a flexible manufacturing basis which allows it to respond quickly to varying demands for customer orders.
- It strictly follows the ISO 9 quality management system and has full-process war-room monitoring through quality inspection laboratories and traceability systems, permitting holding a product qualification rate of above 99.8% to meet international standard certifications.
- The company will drive foreign trade development with the dual wheel of "technology+service," optimizing the global supply chain at every opportunity to provide customers with industrial solutions of the best cost-performance and maximum value addition.
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