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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 0.48-25-3 Series Cylindrical Capacitor 25kvar Three-Phase Cylindrical Self-Healing Low-Voltage Power Capacitor for Metallurgy
Model meaning
Product Datas of BY71 0.48-25-3 Cylindrical Capacitor
| Model | BY71 0.48-20-3 | |
| Rated Working Voltage | 480V | |
| Capacitor Capacity | 345.6μF | |
| Rated Working Current | 30.1A | |
| 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 0.48-25-3 Series Cylindrical Capacitor
Engineered for demanding industrial environments like metallurgy, mining, and heavy manufacturing, the BY71 0.48-25-3 Series Three-Phase Cylindrical Capacitors deliver 25kvar of robust reactive power compensation. Featuring a cylindrical capacitor with two dielectrics—self-healing metallized polypropylene film and advanced dielectric fluid—this design ensures exceptional stability under high current electricity loads and voltage fluctuations. With a rated voltage of 0.48kV, it targets power factor correction problems and solutions by minimizing energy losses and penalties caused by low power factors. The controlled intelligent capacitorsintegrate real-time monitoring to autonomously adjust capacitance in cylindrical capacitorbased on load variations, preventing overcompensation and resonance risks in harmonic-rich grids. Its cylindrical condenser structure optimizes heat dissipation, reducing capacitor voltage loss by 40% compared to conventional designs and extending operational lifespan by over 60,000 hours. This harmonic filter capacitor actively suppresses 3rd to 25th order harmonics, aligning with standards to protect electrical equipment from waveform distortion damage.
Intelligent Integration for Power Quality Enhancement
As a core component in power electronics solutions, the BY71 series enables three-phase power distribution systems to achieve near-unity power factors (>0.98). Its capacitor internalsleverage a cylindrical plate capacitor configuration with segmented electrode technology, enabling precise capacitance for cylindrical capacitor adjustments via IoT-enabled controls. This static capacitor supports three-phase capacitor topologies (star/delta) and three-phase capacitor topologies (star/delta) and capacitor to increase voltage stability during motor starts or grid transients, effectively resolving low voltage on one phase imbalances. Compatible with harmonic system filters and solaris solutions for renewable integration, it reduces THD (Total Harmonic Distortion) by up to 70%, critical for sensitive processes in semiconductor or automotive manufacturing. Power Quality Products like the BY71 are certified for IEC 60831-1/2 standards and include arc-free disconnectors for safety. Partner with Capacitor Maker BaoYu Holdings for turnkey power factor correction design—where power quality and distributionreliability converge.
Key Advantages of BY71 0.48 - 25 - 3 Series Cylindrical Capacitor
1. Advanced harmonic suppression technology to achieve power system stability
BY71 25kvar three-phase capacitors are designed for superior harmonic filtering to minimize voltage distortion in metallurgical operations. Their low inductance cylindrical capacitor design absorbs high-frequency harmonics, preventing equipment overheating and reducing THD (total harmonic distortion). This harmonic suppression capability protects sensitive machinery, increases system reliability, while supporting improved power quality in harsh industrial environments. Can be seamlessly integrated into harmonic filter banks for powerful harmonic control.
2. Efficient reactive power compensation
This low voltage power capacitor provides accurate reactive power compensation to significantly reduce energy costs. The BY71 25kvar unit corrects the lagging power factor caused by inductive loads (e.g. furnaces, motors), reducing reactive power losses to the power company. Its three-phase co-compensation design ensures balanced phase loads, optimizes reactive power (kVAR) delivery, and reduces energy waste. Maximize power efficiency and realize return on investment through lower electricity bills.
3. Self-repair technology extends service life
The BY71 features self-healing capacitor technology that automatically isolates dielectric faults during voltage surges. This smart capacitor design uses metallized polypropylene film to vaporize short-circuit points, thereby maintaining operational integrity and avoiding catastrophic failure. It is ideally suited to the fluctuating power conditions of the metallurgical industry, ensuring long service life, extremely low maintenance costs, and uninterrupted circuit protection, thereby reducing downtime and replacement costs.
4. Strong metallurgical-grade durability
Designed for extreme environments, this cylindrical power capacitor features a corrosion-resistant aluminum case and high-temperature resistant resin filling (ambient temperatures up to 55°C). Its vibration-resistant structure withstands the heavy mechanical stresses of steel mills and foundries. As a low-voltage capacitor certified to IEC 60831, it guarantees explosion-proof safety and reliable circuit protection under sustained overload.
5. Optimize three-phase public compensation
BY71's three-phase co-compensation design enables balanced three-phase power correction. This three-phase capacitor synchronizes the kVAR output of all phases, solving voltage imbalance problems and stabilizing the grid. It is ideal for reactive power management in large inductive load metallurgical facilities, preventing undervoltage/overvoltage on specific phases and extending the service life of transformers and switchgear.
6. Intelligent power quality improvement
This smart capacitor improves energy efficiency and system stability. BY71 actively improves voltage regulation and power quality by compensating for reactive power gaps and reducing harmonics. Its dry cylindrical capacitor technology eliminates the risk of oil leakage while ensuring environmentally friendly operation. As the cornerstone of power factor correction systems, it supports energy savings and complies with power quality standards .
Applications of BY71 0.48 - 25 - 3 Series Cylindrical Capacitor
1. Harmonic control and reactive power compensation in metallurgical plants
BY71 three-phase cylindrical capacitors provide critical harmonic filtering for metallurgical facilities that suffer from power quality harmonics. Arc furnaces, rolling mills, and heavy motor loads generate severe 5th/7th harmonics and reactive power surges, leading to voltage instability and equipment overheating. Our controlled smart capacitors use real-time harmonic system suppression technology to reduce total harmonic distortion (THD) by more than 65% through cylindrical capacitors using dielectric technology. At the same time, they can also perform three-phase power compensation to correct lagging power factor (PF <0.8), significantly reducing penalties and improving PF to more than 0.98. These power quality products have low-voltage electrical compatibility (480V) to prevent single-phase low-voltage imbalance, thereby protecting transformers and switchgear in high-temperature environments.
2. Renewable energy integration and grid stability support
Integrating solar/wind farms into three-phase distribution grids exacerbates power quality and distribution challenges, including voltage flicker and intermittent reactive power gaps. The BY71 series can be used as a static capacitor bank in a power factor correction design, injecting 25kvar capacitance into cylindrical capacitor modules to stabilize the power phases. Its self-healing dielectric ensures protection against large current transients during periods of cloud cover or wind sag. When used with Solaris solutions, these low-voltage capacitors reduce the risk of harmonic capacitor resonance in inverters, while power system capacitors enable seamless circuit connection during grid islanding events - critical for compliance with standards.
3. High-density industrial parks, sensitive electronic products
In manufacturing centers co-located with CNC machines, data centers, and HVAC systems, power quality products like the BY71 prevent capacitor voltage loss and low-current high-voltage interruptions. Their cylindrical plate capacitor design improves capacitor voltage efficiency, offsetting the voltage drop of the starting capacitor during motor ignition. As controlled smart capacitors, they autonomously switch between three-phase capacitor topologies (three-phase compensation/per phase) to correct single-phase low-voltage imbalances within 100ms. This eliminates failures in power electronic solutions and protects electrical equipment from insulation degradation caused by harmonics. As harmonic filter capacitor banks certified by capacitor manufacturers, they can reduce power factor correction issues and solution costs by 40% in semiconductor and automotive factories.
Product Dimensions of BY71 0.48 - 25 - 3 Series Cylindrical Capacitor
| Model | M | H | Installation sole |
| BY71 0.48-25-3 | 116mm | 245mm | M16×25mm |
High - quality Materials Excellent Quality and Fine Products
Nano self-healing dielectrics with resistance to harmonic stress
At the heart of the BY71 is a cylindrical capacitor that features two dielectrics: a gas-impregnated polypropylene film and a proprietary metal oxide “buffer layer.” This nanocomposite structure enables ultra-fast self-healing—partial discharges generated by power quality harmonics evaporate the metallized electrode within 3 μs, isolating defects while maintaining more than 99% of the capacitance value, ensuring the integrity of the cylindrical capacitor1. Crucially, its dielectric formulation uses rare-earth-doped ZnO nanoparticles to suppress harmonic system distortion by absorbing high-frequency transients (2-150 kHz), reducing the dielectric loss tangent by 45% compared to standard harmonic filter capacitors. The cylindrical plate capacitor design uses an axial plasma spray process to apply the film, which ensures a uniform film thickness of 8.2 μm with a tolerance of ±0.1 μm. This eliminates “weak areas” that are susceptible to large current surges during ladle furnace operation. Rigorous testing at 25 kvar reactive load confirmed: THD tolerance up to 8% at 50°C, partial discharge <5 pC, and surge cycles exceeding 100,000 times. The result? This harmonic capacitor has a service life of 60,000 hours in high harmonic power quality metallurgical grids.
Triple safety terminal blocks with anti-corrosion alloy coating
The BY71 series features rugged copper-aluminum composite terminals designed for extreme metallurgical environments. Each terminal block features a zinc-nickel alloy plasma spray coating, a corrosion-resistant barrier that neutralizes electrochemical reactions caused by sulfur dioxide (SO₂) and acidic particles in steel smelters. Unlike standard low-voltage capacitors that use bare copper, this design reduces contact resistance by 60% and maintains stable conductivity even at ambient temperatures of 85°C. This three-phase capacitor uses a dual-spring compression mechanism: an internal Belleville spring washer maintains constant pressure to prevent conductor creep, while an external thermal lock nut prevents loosening under vibration . This eliminates power quality and distribution faults caused by loose connections, which is critical for arc furnace or rolling mill power system capacitors. The terminals integrate smart capacitor diagnostics, monitoring real-time temperature/current asymmetry through embedded microsensors and triggering an alarm when the phase imbalance exceeds 5%. Compatible with 35–120 mm² cables and Class II insulation, these terminals exceed the safety requirements of IEC 60204-1 for electrical equipment in hazardous areas.
Anti-vibration base with active thermal management
Designed for three-phase power stability in heavy machinery areas, the BY71's aluminum alloy chassis integrates four innovations:1.Double-damped suspension: Silicone-isolated steel springs absorb 12–80 Hz vibrations generated by the crusher/conveyor, reducing mechanical stress inside the capacitor by 70%.2.Phase-Separated Airflow Channels: Radial fins create turbulent cooling flow around each cylindrical condenser, reducing hot spot temperatures by 18°C compared to conventional cylindrical capacitors.3.Ground Fault Current Path: The low impedance Al-Mg lattice embedded in the base diverts stray currents (>500 A/3 s) away from the capacitor voltage sensitive elements.4.Modular installation: Slotted rails allow tool-free capacitor replacement in less than 5 minutes – essential for minimizing downtime during continuous casting.Thermal simulations verified that the base can maintain a stable starting capacitor voltage at a 200 A surge current, while its IP54 enclosure effectively resists the intrusion of iron ore dust. The design directly addresses the power factor correction problem in the metallurgical industry by preventing capacitor voltage loss due to thermal runaway, and provides a solution that ensures continuous reactive power compensation even at 100% overload for 60 seconds.
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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.
VOur 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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