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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
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BYFK Series Intelligent Low Voltage Composite Switch Electrical Switching Intelligent Capacitor Switch for Low-voltage Reactive Power Compensation Systems 3 Phase 450V
Technical Datas of BYFK Series Intelligent Low-Voltage Composite Switch
| Model | BYFK Series Intelligent Low-Voltage Composite Switch |
| Ambient temperature | -20℃~+55℃ |
| Relative humidity | At 40℃,20%-90% |
| Rated voltage | 480V three-phase four wire AC 50Hz |
| Allowable deviation | The synchronous change of three-phase voltage shall not exceed ±20% |
| Voltage distortion rate | <5% |
| Rated frequency | 50Hz |
| Rated current | <80A(Ordinary type); <80A(With circuit breaker type) |
| Service life | 500000 times |
| Phase number | △Delta connection method (three-phase); Y-shaped connection method (single-phase) |
| Three phase control capacity | <40Kvar |
| Single-phase control capacity | <10Kvar |
| Power dissipation | <1.5VA |
| Contact pressure drop | <100mV |
| Contact withstand voltage | >1600V |
| Response time | <1000ms |
| Interval between each turn on and turn off | >5 Second |
| Interval between two consecutive connections | =35 Second |
| Control signal | DC12V士20%;Exchange/Communication (Optional) |
| Input impedance | >6.8K |
| Conduction impedance | <0.0032 |
| Inrush current | Less than 1.5 times the rated current |
| Rated current of feedback contact | 1A (put on as connected) |
Introduction of BYFK Series Intelligent Low-Voltage Composite Switch
Next-Generation Switchgear Power Solutions for Demanding Grids
The BYFK Series Intelligent Low-Voltage Composite Switch revolutionizes capacitor switching in 450V Distribution Power Line Voltage systems, delivering unparalleled Power Quality enhancement for industrial and commercial networks. Engineered as a Three-Phase Intelligent Composite Switch, it combines thyristor zero-crossing precision with magnetic latching relays to eliminate inrush currents during capacitor engagement – a critical innovation for protecting 3 Phase Equipment from transients. Unlike conventional Switchgear, this hybrid technology ensures transient-free reactive power compensation by synchronizing operations with Three Phase AC Current sine waves. It dynamically corrects Power Factor deviations below 0.92 and mitigates 3 Phase Voltage Imbalance by enabling per-phase control of AC Electrical Current, neutralizing negative-sequence currents from unbalanced loads. With a robust 63A rating per phase, the BYFK safeguards Power System Devices against harmonic resonance (THDv >5%) and voltage fluctuations (±20%), making it the cornerstone of resilient Switch Gear Solutions.
Intelligent Grid Stabilization for Modern Energy Challenges
As renewable Integration of Energy accelerates, the BYFK Series addresses unique 3 Phase Power Line Voltage challenges in solar/wind applications. Its microcontroller continuously monitors AC Electric Energy dynamics, enabling sub-1-second response to intermittent generation surges – critical for maintaining IEEE 1547-compliant Three Phase Power to Current stability. The proprietary Line Voltage to Low Voltage Relay architecture achieves ultra-low conduction losses (≤3 VA) – 80% more efficient than solid-state alternatives – while dissipating zero heat under continuous 450V operation. For facilities battling Harmonic Mitigation issues, the switch’s embedded algorithms proactively block capacitor switching during harmonic distortion events (THDv >5%), preventing resonant failures in compensation banks. This capability is vital for 3 Phase Power systems with nonlinear loads (e.g., VFDs, data center UPS), where rapid AC Electrical Current fluctuations induce voltage flicker. Rated for -25°C to 70°C environments and >1 million cycles, it ensures reliability in the harshest substations or rooftop solar farms.
Certified Performance for Critical Infrastructure
Precision-engineered for the Lowest Voltage AC compensation scenarios, the BYFK transcends traditional Switchgear Power Solutions with multi-layered intelligence. Its Three-Phase Independent Control stabilizes 3 Phase Power Voltage within ±2% under extreme load swings, protecting sensitive equipment like medical MRI scanners or semiconductor manufacturing tools. The Intelligent Low-Voltage Composite Switch integrates seamlessly with Power Factor correction controllers via Modbus, enabling real-time optimization of reactive power compensation across decentralized microgrids. Certified to standards, this 450V solution reduces grid losses by up to 51% while extending capacitor lifespan 3× – slashing operational costs by $220k/year for industrial users. From steel mills confronting 3 Phase Voltage Imbalance to hospitals requiring harmonic-free backup power, the BYFK Series delivers transformative Power Quality resilience. It embodies the future of Switchgear: where harmonic mitigation, energy intelligence, and uncompromising reliability converge to power sustainable operations.
Key Features BYFK Series Intelligent Low-Voltage Composite Switch
Details Reveal Quality
Hybrid thyristor-relay architecture: zero-energy surge suppression
The core innovation of BYFK compound switch lies in its patented thyristor-magnetic latching relay hybrid design, which is designed to eliminate switching transients while minimizing energy waste. Unlike traditional contactors that generate catastrophic surge currents (up to 100 times the rated current), thyristor modules can be precisely triggered at the voltage zero crossing (ON) or current zero crossing (OFF) intersection - the intersection is verified by a real-time voltage/current sensor with an accuracy of ±0.5ms. This zero-crossing control limits the surge current to less than 3 times the rated current, thereby preventing capacitor dielectric stress and grid voltage sag. After switching, the magnetic latching relay (AgNi alloy contacts, resistance ≤100mΩ) engages within 20ms to maintain the current with a near-zero holding power (≤1.5W, while AC contactors are 5-15W). The design avoids the inherent conduction losses of thyristors (1-2V drop/device = 700W of heat at 350A) by bypassing the thyristors after transient-free switching, eliminating the need for a heat sink and reducing operating energy consumption by 98%. The PCB assembly is encapsulated with thermally conductive epoxy to withstand junction temperatures of 155°C in steel mills or solar farms, achieving more than 100,000 mechanical cycles, 5 times the industry standard. This synergistic effect enables harmonic-free capacitor switching (THiD <3%), which is critical in MRI labs and semiconductor plants where voltage transients can disturb sensitive loads.
Military-grade components and strong environmental resistance
BYFK is designed for harsh industrial environments and integrates industrial-grade components that have been validated by 1,000-hour salt spray testing (per ISO 9227) and 85°C/85% RH damp heat testing. Key material benefits include:
Relay Contacts: Silver Nickel (AgNi30) alloy with embedded arc extinguishing chambers to resist welding at 450V/100A fault current and extend electrical life to 500,000 operations.
Thyristor modules: Industrial-grade SCRs (withstand surge voltage 1,600V) are mounted on a ceramic substrate and can operate at 70°C without derating.
Housing: UL 94 V-0 flame retardant PPO housing with IP40 protection to prevent the ingress of dust in cement plants or coal mines.
PCB Protection: Conformal coating (IPC-CC-830B) protects against corrosion from moisture, H₂S, and chlorine in wastewater treatment facilities.
The design maintains an operating temperature range of -25°C to +70°C at 2,000m above sea level and is vibration resistant up to 2g. The copper busbars are tin-plated to minimize contact resistance drift, while the optically isolated control circuitry (10kV isolation) ensures noise immunity even in CNC machining centers where electromagnetic interference (EMI) is a concern. These features enable reliable harmonic mitigation and power factor correction in offshore wind farms (-40°C), desert solar power plants (cabinet temperature 70°C), and humid paper mills, reducing capacitor replacement costs by 60%.
Predictive diagnostics and smart grid integration
BYFK embeds a 32-bit ARM Cortex-M4 microcontroller and is equipped with real-time self-diagnostic algorithms to enable predictive maintenance, which is critical for unmanned substations. Its multi-layer monitoring system tracks:
Component health: Detects thyristor firing failure (≤5μs response) or relay contact wear through contact resistance peak (>150mΩ).
Grid anomalies: Identification of phase loss (1 cycle detection), voltage sag (<85% Un) or frequency deviation (±2Hz) to prevent unsafe switching.
Load capacitor synchronization: Prevents resonance by verifying capacitor bank compatibility (≤40 kvar) before engagement.
The data stream is transmitted via isolated RS485/CANBus (compliant with EN 61000-4-4 Level 4 EMC immunity standards) and can be integrated with cloud platforms such as Acrel EMS for adaptive reactive power compensation. When a grid fault occurs (e.g., a low voltage ride-through (LVRT) event in a solar farm), the switch coordinates with the inverter to inject reactive current in accordance with the standard and stabilize the voltage within 150ms. The PCB adopts a four-layer stack-up structure with guard rings and ferrite beads to suppress EMI below EN 55011 Class A limits, ensuring harmonic-free operation when used with APF/SVG filters. This smart feature can reduce maintenance costs by 40% and achieve zero unplanned downtime in automotive assembly lines and data centers.
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.
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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