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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
BY96-SPC/30kvar-0.4/4L-N Series Low Voltage Three-Phase Unbalance Correction Device 30kvar for Three Active Load Balancer
Model Meaning

Parameters of BY96-SPC/30kvar-0.4/4L-N Series Three-Phase Unbalance Correction Device
| Model | BY96-SPC/30kvar-0.4/4L-N | |
| System Specification | Rated Line Voltage | AC380+20% |
| Electrical Wiring | Three phase three wire/three phase four wire | |
| Take Electric Wires | C-phase line/DC bus (customizable) | |
| Grid Frequency | 50Hz/60Hz | |
| Circuit Topology | Three phase three-level | |
| Full Response Time | Compensated reactive power:<5ms; Full compensation: <15ms-1~1 adjustable | |
| Reactive Power Compensation | -1~1 adjustable | |
| Correcion Rate of 3-phase Imbalance | 100% | |
| Harmonic Filtering rate | >97% | |
| Overall Efficiency | >97.5% | |
| Switching Frequency | 50kHz | |
| Cooling Method | Intelligent air cooling/forced air cooling/T-type natural air | |
| Noise | <60dB@1m/<50dB@1m(T-shaped) | |
| Installation Method | Module, rack, cabinet, wall mounted, box mounted | |
| Exterior | Colour | Aluminum zinc coated board, white, black, gold primary colors, etc. (customizable) |
| Communication Interface | RS-232,RS485 bus (optional Ethernet, WLAN, USB2.0) | |
| Communication Protocl | Modbus protocol | |
| Fault Alarm | Have | |
| Background Monitoring | Optional GPRS remote monitoring; Optional Bluetooth and NFC installed in the module | |
| On Site Display | 7-inch Chinese color touch screen (optional) | |
| Display current, voltage, three-phase power, power factor, harmonic content, etc | ||
| Environmental Requirements | Temperature | -20℃~+50℃ |
| Relative Humidity | Not exceed 90% RH without condensation | |
| Installation Altitude | Not exceed 2000m rated capacity, greater than 2000m reduced capacity operation | |
Product Overview of BY96-SPC/30kvar-0.4/4L-N
The three-phase load unbalance automatic control device (SPC) is a comprehensive power quality management device on the user side of the low-voltage distribution network, which is used to solve problems such as three-phase current imbalance, reactive power compensation and harmonic compensation. The SPC device can use the control algorithm to analyze the positive sequence, negative sequence, zero sequence components and reactive power of the unbalanced current generated by the distribution network users in different time periods or under different load conditions. By triggering power electronic devices such as IGBT, the inverter generates a reaction current to offset the unbalanced current, thereby achieving the purpose of eliminating imbalance and compensating reactive power.
The BY96-SPC/30kvar-0.4/4L-N Series is a cutting-edge Three-Phase Unbalance Correction Device designed to optimize power system quality and ensure stable quality of electricity supply in industrial and commercial settings. This advanced power quality product addresses critical challenges such as three-phase voltage unbalance, harmonic current distortions, and reactive power inefficiencies, which are common in facilities with heavy machinery or uneven electrical loads. By dynamically adjusting 3-phase phase-to-phase voltage imbalances, the device ensures balanced three-phase voltage distribution, significantly reducing energy losses and enhancing equipment longevity. Its Anti-Harmonic technology suppresses up to the 25th order harmonics, mitigating harmonics problems in factories and protecting sensitive solid-state electronics from voltage fluctuations and electrical arc risks. Integrated with a power quality analyzer, the system provides real-time monitoring of parameters like power quality factor (PQF) and 3-phase delta voltage, enabling proactive adjustments to maintain quality electricity standards. Ideal for applications requiring power factor correction, the device also supports electric supply stability in environments ranging from manufacturing plants to renewable energy grids, ensuring compliance with global power quality and distributionregulations.
Engineered for power quality electrical engineering excellence, the BY96-SPC series combines three-phase power balancing with Harmonic governance capabilities to deliver a holistic power quality system. Its modular design allows seamless integration into existing infrastructure, while adaptive algorithms optimize phase-to-phase voltage in 3-phase systems, even in scenarios where 3-phase v single phase loads coexist. The device’s piezo-electric sensors and solid-state electronics enable rapid response to fluctuations, ensuring minimal downtime and maximized power quality factor efficiency. As a power quality expert solution, it not only resolves three-phase unbalance but also enhances electrical current stability, reducing thermal stress on transformers and cables. Compatible with power quality group standards, this device is a cornerstone for industries aiming to achieve quality power resilience, lower operational costs, and meet sustainability goals. Whether addressing harmonics problems factories face or improving power devices reliability, the BY96-SPC series stands as a benchmark in power quality abstract innovation, setting new standards for electrical supply optimization and power quality products performance.

Working Principle of BY96-SPC/30kvar-0.4/4L-N
BY96-SPC/30kvar-0.4/4L-N series is an advanced three-phase unbalance correction device designed to optimize power quality by dynamically solving three-phase voltage imbalance problems in low-voltage distribution systems and reducing harmonic currents. The device uses real-time monitoring and high-speed digital signal processing (DSP) technology to continuously analyze three-phase voltage and current parameters to detect imbalances caused by uneven loads or harmonic distortion.
When three-phase imbalance occurs, the device activates the active compensation module and injects accurate compensation current into the grid using insulated gate bipolar transistor (IGBT) technology. This eliminates the imbalance by redistributing the loads of each phase, ensuring balanced three-phase voltage and current output. At the same time, the device can also filter out harmonic currents (up to 50th) generated by non-linear loads such as variable frequency drives or LED lighting, thereby reducing harmonics and total harmonic distortion (THD) to less than 5%.
The system also integrates reactive power compensation to stabilize voltage fluctuations, improve energy efficiency and minimize line losses. Its adaptive control algorithm automatically adjusts the compensation strategy according to load changes, ensuring seamless operation in industrial, commercial or renewable energy environments.BY96-SPC/30kvar-0.4/4L-N significantly improves power quality and extends equipment life by solving three-phase unbalance correction and harmonic suppression problems, and complies with international standards such as IEEE 1159 and IEC 61000. Ideal for facilities that are highly sensitive to voltage instability or harmonic interference, the device provides a cost-effective all-in-one solution for active load balancing, harmonic suppression, and grid optimization.

Product Features of BY96-SPC/30kvar-0.4/4L-N
Real-time three-phase unbalance correction:Advanced dynamic compensation technology automatically balances the three-phase voltage/current imbalance (residual imbalance ≤ 1%), ensuring the three-phase voltage balance and stability of industrial loads.
Active harmonic current suppression:Integrated harmonic control capability can filter out up to 97% of 2nd to 25th harmonics, achieving THDi < 3% in compliance with IEEE 519 standards, and achieving cleaner power quality.
Dual-function power quality optimization:Through fast response IGBT technology (≤10ms), three-phase load imbalance and harmonic distortion are solved simultaneously, improving the overall electrical system efficiency by 15-30%.
Intelligent reactive power compensation:Automatically adjust capacitive/inductive reactive power (0-30kVar), maintain power factor ≥ 0.98, effectively reduce line loss and optimize energy consumption.
4L-N multifunctional protection system:Combines phase-to-neutral voltage stabilization, transient overvoltage protection (40kV/μs) and thermal overload protection in one compact unit .
BY96-SPC/30kvar-0.4/4L-N Size Information

| Model | Capacity | Size |
| BY96-SPC/30kvar-0.4/4L-N | 30kvar | 450×580×110 |
Applications of BY96-SPC/30kvar-0.4/4L-N Series Low Voltage Three-Phase Unbalance Correction Device

Industrial manufacturing plants
In industrial environments, three-phase unbalance and harmonic distortion present significant challenges due to the presence of high-power equipment such as motors, variable frequency drives (VFDs), and arc furnaces. These devices often cause uneven loading of the phases, resulting in neutral current surges, transformer overheating, and increased energy losses. For example, a manufacturing plant with a mix of single-phase and three-phase loads such as lighting systems, electric vehicle charging stations, and conveyor belts may experience voltage fluctuations of more than 10% and total harmonic distortion (THD) of up to 20%.The BY96-SPC series solves these problems by dynamically balancing the three-phase current in real time, reducing the neutral current by up to 90%. Its advanced SiC-MOSFET technology suppresses the 5th, 7th and 11th harmonics, ensuring total harmonic distortion (THD) is less than 5%. By stabilizing the voltage and improving the power factor (up to 0.99), the device prevents equipment damage and extends the life of motors and UPS systems. In addition, its modular design allows seamless expansion from 30kvar to 960kvar, making it ideal for large facilities with fluctuating loads.

Renewable energy integration and microgrids
Solar farms, wind turbines, and battery energy storage systems (BESS) generate voltage fluctuations and harmonic pollution when connected to the grid. For example, a solar PV power plant equipped with multiple inverters may generate harmonic currents that exceed grid standards, causing instability in the low-voltage distribution network.The BY96-SPC series is a key component in the renewable energy ecosystem by compensating reactive power and suppressing harmonics. Its dynamic load balancing function ensures stable grid connection even when solar irradiance or wind speed changes rapidly. The device's solid-state design eliminates mechanical wear and enables reliable operation 24/7 in harsh environments. By maintaining THD <5% and power factor >0.95, it can help renewable energy projects meet regulatory requirements while maximizing energy output.

Commercial buildings and retail complexes
Commercial environments such as shopping malls, office buildings, and hospitals rely heavily on single-phase loads (such as LED lighting, HVAC systems, and IT equipment), which often leads to severe three-phase imbalance. For example, in a retail mall with 80% single-phase loads, the neutral current level may exceed 150% of the phase current, causing voltage sags and light flickering.The BY96-SPC unit mitigates these issues by actively redistributing reactive power and neutral and harmonic distortion. Its adaptive control algorithm ensures compliance with IEEE 519 standards, reducing neutral current to safe levels while stabilizing voltage within ±2%. Integrated IoT sensors provide real-time data on power quality indicators, enabling facility managers to optimize energy use and reduce electricity costs by up to 20%. The compact 4L-N configuration also simplifies installation in tight spaces, making it ideal for retrofitting existing electrical systems.
Storage Workshop

Production workshop

Workshop Vedio
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.
Workshop Strength: Intelligent Production and Quality Control System
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Intelligent Production Equipment
The company's workshop is equipped with a modern mold center, technology R&D center, and intelligent digital testing equipment, enabling full-process automated management from raw material processing to finished product assembly. For example, the production line adopts advanced CNC machine tools and automated assembly systems to ensure product precision and consistency. -
Strict Quality Control
Having passed the ISO international quality management system certification, the workshop has established multiple quality inspection procedures, including harmonic testing, dielectric strength testing, and temperature rise testing, to ensure that each device complies with international standards. It is worth mentioning that the company's products have been used in key domestic and international projects for a long time, and their quality stability has been verified. -
Flexible Production Capacity
To meet the diverse needs of overseas customers, the workshop supports small-batch customization and rapid delivery. For example, it can adjust product parameters according to the grid standards of customers' countries (such as 60Hz in Europe and the US or 50Hz in the Middle East) and provide multi-language operation interfaces.
Global Market Layout
The company's products have been exported to more than ten countries in Europe, Southeast Asia, the Middle East, etc., covering scenarios such as factories, petrochemical plants, and solar power generation. By participating in international exhibitions (such as the Russia HVAC Exhibition) and matchmaking conferences organized by the Zhejiang Provincial Department of Commerce, the company directly reaches overseas buyers and showcases its technical solutions.
Customized Solutions
The company provides "product + service" integrated solutions tailored to the grid environments and industry needs of different countries. For example, it designs high-protection-grade equipment for ship or airport projects or optimizes harmonic governance solutions for new energy projects. The technical team cooperates with top universities such as Zhejiang University and Shanghai Jiao Tong University in R&D to ensure technological advancement.
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


