Intelligent Low-Voltage Composite Switch
✅ Ultra-Compact, Intelligent Design
✅Intelligent Dynamic Control
✅Precision Zero-Crossing Switching， fast response,200ms
✅ High Efficiency & Extended Service Life
✅Elimination of Inrush Current
✅Extended Service Life，500000 times
- Product Introduction
The Intelligent Low-Voltage Composite Switch represents a new generation of intelligent electronic switching solutions engineered specifically for low-voltage reactive power compensation systems. To accommodate diverse grid requirements, the Intelligent Low-Voltage Composite Switch series is available in two configurations:
Three-Phase (Group) Compensation Type: Designed for switching three-phase capacitors applying a Delta connection.
Single-Phase (Split-Phase) Compensation Type: Designed for individual phase regulation with single-phase capacitors in a Star (Y) connection.
Strengths
product key technologies
Ultra-Compact, Intelligent Design: Driven by advanced microcontroller unit (MCU) technology, the switch seamlessly integrates software intelligence with robust hardware, significantly optimizing physical space requirements.
Intelligent Dynamic Control: By analyzing the real-time waveform characteristics of the three-phase power supply, the onboard MCU executes independent phase-angle tracking, systematically initiating switching operations for each individual phase within a few alternating current (AC) cycles.
Precision Zero-Crossing Switching: By completing operations precisely at the voltage zero-crossing point, the system achieves completely inrush-free and transient-free switching, entirely eliminating harmful switching overvoltages.
High Efficiency & Extended Service Life: Featuring low power consumption, minimal thermal loss, and an exceptionally low failure rate, the Intelligent Low-Voltage Composite Switch series serves as the ideal, high-reliability replacement for traditional AC contactors and solid-state non-contact switches in modern low-voltage power factor correction (PFC) cabinets.
Technical Parameters
| JNFK Series Intelligent Low-Voltage Composite Switch Technical Specifications | |
| Parameter Item | Parameter Value |
| Model | JNFK Series Intelligent Low-Voltage Composite Switch |
| Ambient temperature | -20℃~+55℃ |
| Relative humidity | At 40℃,20%-90% |
| Rated voltage | 380V/220V 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 | <60A(Ordinary type); <60A(With circuit breaker type) |
| Service life | 500000 times |
| Phase number | three-phase and single-phase |
| Three phase control capacity | ≤30kvar |
| Single-phase control capacity | ≤10kvar |
| Power dissipation | <1.5VA |
| Contact pressure drop | <100mV |
| Contact withstand voltage | >1600V |
| Response time | <200ms |
| Interval between each turn-on and turn-off | >5 Seconds |
| Interval between two consecutive connections | =35 Seconds |
| Control signal | DC12V±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) |
The values provided above are typical representatives only. Our company reserves the right to the final modification and interpretation of all product data.
Key Features
Technical Features & Performance Specifications
1. Dual Compensation Modes
Three-Phase (Common) Compensation: Optimizes balanced networks by utilizing a Delta connection for simultaneous three-phase capacitor switching.
Single-Phase (Split) Compensation: Supports unbalanced networks by utilizing a Star (Y) connection for independent, individual-phase capacitor control.
2. Advanced Control Technology
Microcontroller-Driven Intelligence: The onboard MCU dynamically analyzes grid phase angles to synchronize switching operations within milliseconds, effectively neutralizing transient overvoltages and leakage currents.
Precision Zero-Crossing Switching: Executes connection and disconnection precisely at the voltage/current zero-crossing points, completely eliminating contact arcing and severe inrush currents.
3. Key Performance Advantages
Elimination of Inrush Current: Provides robust transient-free protection, preventing premature degradation of capacitors and upstream grid equipment.
High Efficiency & Low Thermal Dissipation: Engineered for energy-efficient operation with minimal power consumption and extremely low heat generation.
Extended Service Life: The advanced hybrid solid-state architecture eliminates mechanical wear, drastically outlasting traditional magnetic AC contactors.
Industrial-Grade Reliability: Minimizes system downtime via a simplified, robust circuit topology that delivers an exceptionally low failure rate.
4. Target Applications
Power Factor Correction (PFC): Ideal for dynamic reactive power compensation in industrial, commercial, and utility low-voltage networks.
Capacitor Bank Modernization: Designed as a high-reliability drop-in replacement for conventional AC contactors and basic thyristor switches in low-voltage capacitor cabinets.
Diagram
Product Dimension
Quality Assurance
Rigorous Raw Material Control: We implement strict incoming material inspections and source tracking to eliminate potential quality defects right at the origin.
Advanced Production Infrastructure: Utilizing state-of-the-art manufacturing equipment and automated assembly lines, we guarantee high-precision production and consistent product quality.
Stringent Multi-Stage Testing: Every unit undergoes high-standard product inspection and comprehensive type testing to ensure maximum operational efficiency and flawless field performance.
Standardized Operations Management: Our manufacturing processes adhere to strict standardized management frameworks (including ISO standards), ensuring lean, seamless, and error-free production workflows.
Expert R&D and Continuous Innovation: Backed by a professional R&D engineering team, we continuously pioneer new technologies and refine product designs to swiftly adapt to evolving global market demands.
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