BYFK Series Intelligent Low Voltage Composite Switch Three-Phase Intelligent Composite Switch Low Voltage Compensation Capacitor Switching Device 63A Current 400V

Applications of BYFK Series Intelligent Low-Voltage Composite Switch 

Renewable energy integration (solar/wind farms)

Solar PV inverters and wind turbines inject intermittent surges and harmonic distortion (THDi >15%) into the distribution grid, causing voltage sags/swells and violating regulations.While solar farms require capacitive reactive power to offset the inductive impedance of the grid, conventional thyristor switches overheat under continuous conduction, with losses ≥7W per phase, requiring forced cooling78. BYFK’s ultra-low power design (≤3 VA) utilizes magnetic latching relays for steady-state conduction (resistance ≤0.003 Ω), achieving zero heat dissipation even in a 70°C enclosure.During cloud transients or gusty winds, BYFK responds to capacitor bank reconfiguration in less than 1 second, dynamically compensating for reactive power shortfalls to maintain grid-code-compliant power factor (0.95–1.0)8. Its 400V/63A voltage rating can handle bidirectional currents fed back from the inverter, while the voltage rise suppression feature protects the step-up transformer from overvoltage during light loads.

Commercial complexes and critical infrastructure (data centers/hospitals)

Commercial buildings face a triple threat: non-linear loads (e.g., LED lighting, UPS systems), unbalanced loads (e.g., single-phase IT equipment), and stringent power quality standards . Conventional capacitor switching exacerbates harmonics—contactors inject transients during random switching, while pure thyristor devices generate parasitic harmonics (e.g., 3rd/5th harmonics) due to di/dt stress. BYFK’s zero-crossing technology ensures harmonic-free switching by meshing synchronously with the voltage sine wave, eliminating high-frequency interference.For HVAC systems, which account for 40-60% of a building’s energy consumption, BYFK enables real-time reactive power compensation to reduce apparent power demand, thereby reducing transformer kilovolt-ampere (KVA) demand by 30%. Its phase loss protection and automatic power-off function prevent capacitor damage during power failures—critical for hospitals where voltage sags can interfere with MRI/CT scanners. In the Shanghai Pudong data center, BYFK achieved 99.2% power factor consistency, neutralized the neutral current of unbalanced server racks, and reduced cooling costs by 18% by reducing heat caused by harmonics.

 Industrial manufacturing and heavy machinery facilities

In industrial environments (e.g., factories, steel mills, chemical plants), highly inductive loads from motors, transformers, and welding equipment can cause severe power factor lagging (typically 0.6–0.7) and voltage instability.  Conventional contactor-based capacitor switches generate damaging inrush currents (up to 20 times the rated current) during capacitor engagement, accelerating capacitor aging and increasing maintenance costs. The BYFK series eliminates these issues with thyristor-electromagnetic relay hybrid technology, enabling zero-voltage turn-on and zero-current turn-off for inrush-free switching. 17 This extends capacitor life by 90% while reducing line losses by up to 51% with precise power factor correction (PFC) to ≥0.959.Crucially, industrial grids are often contaminated by harmonics (e.g. 5th/7th harmonics generated by frequency converters) that are ignored by conventional switches. BYFK has a built-in harmonic detection algorithm that blocks capacitor switching when voltage distortion exceeds 5%, preventing harmonic amplification and resonance risk. For facilities with unbalanced phases (e.g. CNC machine tool clusters), its three-phase independent control ensures reactive power compensation for each phase, neutralizes negative sequence current, and stabilizes voltage within ±2%. BYFK has been deployed at PetroChina’s refineries, reducing transformer losses by 34% and eliminating capacitor explosion incidents associated with overvoltage transients.

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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. 

Our 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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