📌 Product Name
KVS Series Intelligent Low-Voltage Power Capacitor Reactive Power Compensation Cabinet (Indoor Type)
1. Product Definition
The KVS type low-voltage reactive power compensation device is an intelligent power capacitor compensation equipment with a main busbar rated current ranging from 65.3A to 481.4A. It is suitable for power distribution systems with AC 50Hz and rated voltage of 400V. By automatically switching capacitor banks, this product effectively improves the power factor and reduces line losses, making it a key device for energy efficiency management in modern power distribution systems.
2. Product Features
- Precise Compensation: ±1% power factor control accuracy
- Intelligent Control: 7-inch touch screen human-machine interface supporting multiple control strategies
- Modular Design: Drawer-type capacitor bank modules for easy maintenance
- Multiple Protections: Overvoltage, undervoltage, overcurrent, temperature and other protection functions
- Harmonic Suppression: Optional reactors (7%/14% reactance rate) for harmonic suppression
- Communication Integration: Standard RS485 interface supporting Modbus protocol
3. Main Structural Components
| Component | Function Description |
|---|---|
| Cabinet Structure | Cold-rolled steel plate with plastic spraying, protection grade IP30 (optional IP42) |
| Intelligent Controller | Uses DSP digital signal processor for real-time monitoring of system parameters |
| Compensation Module | Self-healing low-voltage capacitors (capacity 5～50kvar/group) |
| Switching Device | Thyristor/contactor hybrid switch (switching time ≤20ms) |
| Protection System | Dual protection of fuses + thermal relays |
| Monitoring System | Voltage/current transmitters, temperature sensors |
4. Technical Parameters
| Item | Parameter Range |
|---|---|
| Rated Voltage | AC 400V (±20%) |
| Rated Frequency | 50Hz ±5% |
| Main Busbar Current | 65.3A～481.4A (corresponding to compensation capacity 30～300kvar) |
| Compensation Accuracy | ±1% (power factor) |
| Switching Response Time | ≤20ms (thyristor type) |
| Capacitor Loss | ≤0.2W/kvar |
| Protection Grade | IP30 (standard) / IP42 (optional) |
| Operating Environment Temperature | -25℃～+55℃ |
5. Application Scenarios
- Industrial Field: Workshop with inductive loads such as injection molding machines and rolling mills
- Commercial Buildings: Central air conditioning systems in large shopping malls
- Public Facilities: Power distribution systems for medical imaging equipment in hospitals
- New Energy Supporting: Compensation at the grid connection point of photovoltaic inverters
- Infrastructure: Substations for subway traction systems
6. Product Advantages
- Significant Energy Saving: Improves power factor to over 0.95, reducing line losses by 30%～50%
- Intelligent Operation and Maintenance: Supports self-diagnosis of faults and remote monitoring
- Safe and Reliable: Capacitors with built-in discharge resistors (voltage drops below 50V in 3 minutes)
- Flexible Configuration: Supports mixed compensation mode of common compensation + split compensation
- Easy Expansion: Modular design supports later capacity expansion
7. Executive Standards
- GB/T 22582-2008 “Low-Voltage Power Capacitors”
- GB/T 15576-2020 “Low-Voltage Reactive Power Compensation Devices”
- JB/T 10695-2007 “Low-Voltage Reactive Power Compensation Controllers”
- IEC 60831-1:2014 “Shunt Power Capacitors”
8. Optional Configurations and Expansion Modules
- Smart electric meter / power quality analysis module
- RS485 communication interface (Modbus protocol)
- PLC controller, touch screen intelligent monitoring system
- UPS or diesel generator linkage interface
- Temperature and humidity sensor, heating and dehumidification device
- Leakage monitoring, fault indicator
9. Packaging and Delivery
- 100% electrical performance testing before leaving the factory
- Provide installation instructions, electrical schematics, and qualification certificates
- Standard wooden box packaging, suitable for long-distance transportation
- Delivery cycle: 15～20 working days for standard configuration; please inquire separately for customized products
10. Installation and After-Sales Service
- Attached with installation guide, supporting remote video or on-site technical guidance
- Warranty period: 12 months
- Service method: Provide 7×24-hour technical support, support regular inspection and parts replacement
- Support OEM/ODM mass customization
11. Selection Suggestions and Precautions
1. System Parameter Confirmation:
- Measure the maximum load current and harmonic content
- Determine the target power factor (usually ≥0.95)
2. Compensation Method Selection:
- Choose common compensation scheme (△ connection) for three-phase balanced loads
- Choose split compensation scheme (Y connection) for loads with more single-phase components
3. Harmonic Treatment Requirements:
- Configure reactors when THDi > 15%
- Recommend 14% reactance rate for inverter loads
4. Installation Environment Requirements:
- Avoid direct sunlight (temperature rise affects service life)
- Ensure ventilation spacing (≥100mm on both sides of the cabinet)
5. Intelligent Configuration:
- Choose communication function when energy management system access is required
- Recommend redundant controllers for critical applications
Note: This device can be equipped with high-quality capacitors from domestic and international brands (such as Nokia, Tongfeng, etc.), providing a 5-year warranty service. It is recommended to provide a power quality test report to design the optimal compensation scheme. For special working conditions (such as mines, ships, etc.), customized explosion-proof and anti-corrosion products can be provided.
