BY81JS/450-25+25 Series Intelligent Capacitor Rated Voltage 450V Electricity Intelligent Capacitor Devices Three-Phase Co-compensation Power Capacitor

Model Meaning

Main Parameters of BY81JS/450-25+25 Series Intelligent Capacitor

Introduction of BY81JS/450-25+25 Series Intelligent Capacitor

The BY81JS/450-25+25 Series redefines low-voltage capacitor performance with its advanced 3-phase capacitor architecture, engineered to optimize power quality in demanding 3-phase electrical systems. Designed for capacitor compensation in low-voltage electrical grids (up to 450V), this electric capacitor integrates a modular capacitor compensation system that dynamically balances 3 phases of power to eliminate voltage imbalances and reduce capacitor power consumption by up to 30%. Its 450V reactive power compensation module employs intelligent power factor correction to stabilize 3-phase electric voltage, ensuring seamless compatibility with industrial motors, renewable inverters, and data center loads. The harmonic suppression capacitor bank actively neutralizes harmonics in power caused by nonlinear loads, leveraging anti-harmonic algorithms to achieve harmonic mitigation and protect sensitive electrical equipment from power quality harmonics distortion. Built for resilience, the compact intelligent capacitor group features overload protection capacitor units and temperature-adaptive capacitor control, maintaining optimal performance in extreme operational conditions. With an RS485 communication interface, this power system capacitor enables real-time monitoring and remote configuration, aligning with smart grid standards for 3-phase 3-phase automatic compensation. Ideal for 3-phase low voltage applications, it ensures voltage on 3 phase stability, minimizes energy losses, and enhances electrical power reliability across manufacturing plants, solar farms, and commercial infrastructures.

As a high-efficiency energy-saving capacitor device, the BY81JS/450-25+25 Series excels in 3-phase power capacitor applications requiring precise capacitor compensation and robust harmonic capacitor resilience. Its phase capacitor design supports 3-phase electric load balancing, automatically adjusting reactive power to match fluctuating 3 phases of powerdemands. The modular capacitor compensation system scales effortlessly, allowing customization for 3-phase electrical systems ranging from small facilities to large-scale industrial complexes. By integrating intelligent power factor correction, this low-voltage capacitorreduces capacitor power consumption while improving power quality metrics such as voltage flicker and THD (Total Harmonic Distortion). The temperature-adaptive capacitor control system prevents overheating, even during peak loads, while the harmonic suppression capacitor bankensures compliance with international power quality harmonics standards. Compatible with 3-phase low voltage networks, its power capacitor 3 phase configuration delivers voltage on 3 phase accuracy within ±1%, critical for protecting electrical equipment in harsh environments. The RS485 communication interface facilitates seamless integration with SCADA and IoT platforms, enabling predictive maintenance and energy analytics. Trusted for harmonic mitigation in steel plants, wind farms, and smart cities, this power on capacitor solution combines 3-phase electric voltage precision, anti-harmonic innovation, and low-voltage electrical adaptability to drive sustainable energy efficiency worldwide.

Working Principle of the BY81JS/450-25+25 Series Intelligent Capacitor

MCU intelligent measurement and control part
All electronic components in the intelligent measurement and control components are of wide temperature and industrial grade. They can adapt to harsh environments with large temperature changes and severe electromagnetic interference. They can work continuously and reliably for a long time, have a high degree of intelligence, and stable control performance.

Zero-crossing synchronous switching technology based on mechanical contacts

The company has summarized the characteristics and disadvantages of mechanical contactors, contactless thyristors, and compound switches, and combined with years of development and actual operation experience, independently developed a new generation of devices that use microelectronic software and hardware technology to effectively control the contacts of mechanical electromagnetic relays: Based on mechanical contacts, the zero-crossing synchronous switching technology of low-voltage power capacitors is realized. When the AC current at both ends of the contacts is zero, the contacts are closed. When the AC voltage at both ends of the contacts is zero, the contacts are disconnected to avoid the impact of surge current generated when the capacitor is put into use on the system voltage, reduce equipment loss, and increase the service life of the capacitor. Low-voltage power capacitor

Low voltage power capacitors

This product uses a self-healing low-voltage parallel compensation capacitor, which uses a gradually thickened zinc-aluminum metallized polypropylene film as a medium, and has extremely high stability and reliability. Among capacitors of the same brand, the larger the single capacitor, the longer its core component and the thicker the wire diameter. The longer the component, the greater the resistance loss; the thicker the component, the larger the surface conductive layer area, the greater the temperature difference between the inside and outside of the component, and the easier it is for the conductive layer to fall off the plate. Therefore, the use of a single large-capacity capacitor in parallel is not as reliable as a small-capacity capacitor, and it can also effectively increase the number of capacitor switching levels. At the same time, the capacitor has a built-in temperature sensor, which can reflect the internal heating level of the capacitor in the case of overvoltage, harmonics, leakage current, high ambient temperature, etc., to achieve over-temperature protection.

Product Advantages of BY81JS/450-25+25 Series Intelligent Capacitor

1. It realizes the perfect combination of measurement and control technology and synchronous switch, controls the action speed of switching, eliminates bounce, improves life tracking and corrects closing phase angle, and the switching life reaches millions of times. Compared with the existing intelligent power capacitors of the same type, it has the advantages of high reliability, low failure rate, low power consumption and long life.

2. There is no inrush current when closing the switch, realizing zero voltage switching, zero current switching and synchronous switching of the capacitor, which completely avoids operating overvoltage, overvoltage breakdown, arcing and restrike.

3. Compensate in the most appropriate way, with perfect control function and high-end power analyzer function, complete functions, good performance, and can also be configured with various peripherals to meet the needs of different customers.

4. The product has complete measurement and protection functions, and has special protections such as controlling indoor temperature, grid harmonic content, phase failure, and three-phase imbalance.

5. This product can be used in multiple units in a modular manner. When in use, the main unit automatically generates electricity, and the others are slave units, forming a reactive power automatic control system. If an individual unit fails, it will automatically exit from the slave unit without affecting the operation of other units.

6. If the host fails, it will automatically exit and generate a new host to form a new system operation, which is highly intelligent. A single capacitor displays the product operation status and electrical circuit status, and the human-computer dialogue is simple and intuitive.

Terminal Diagram of BY81JS/450-25+25 Series Intelligent Capacitor

 Product Dimension Information