LV Intelligent Capacitor For Power Factor Correction
✅High Integration, Easy Installation
✅Intelligent Switching, Precise Compensation
✅Zero-crossing switching and Comprehensive Protection
✅Networking & Remote Management
✅Easy Maintenance
- Product Introduction
LV intelligent capacitor for power factor correction is advanced versions of traditional low-voltage power capacitor (self-healing). Integrate the capacitor unit, intelligent measurement and control module, switching device, protection circuits (fuses, overtemperature protection), and communication module into a compact, single unit.
Key Components
1. Capacitor Body: Our low voltage capacitor for power factor correction uses self-healing metallized film technology,offering self-healing, dry-type construction, and compact size.
2. Intelligent Measurement & Control Module:
● Main Controller:Usually a high-performance microprocessor
● Sampling Circuit:Monitors grid parameters in real-time, such as voltage, current, power factor, and harmonics.
● Protection System:
Electrical Protection:Overvoltage,undervoltage,overcurrent,phase loss,three-phase imbalance,etc.
Temperature Protection: Built-in temperature sensors prevent overheating.
Self-Diagnostics:Continuously monitors its own status and automatically deactivates and reports faults.
3. Communication Interface (Key for Networking):
Standard RS485 interface supporting protocols like Modbus-RTU.
Expandable with Ethernet, wireless communication,for easy integration into smart grids or IoT systems.
Technical Parameters
| General Characteristics | |
| Standards | IEC/EN 61921 & GBT15576-2020 |
| Type | New generation box type, Self-healing |
| Rated Voltage (Un) | 250V to 525V ±20% |
| Frequency (In) | 50Hz ±10% |
| Connection | 3-phase |
| Power range | 5 to 60 kvar |
| Capacitance tolerance | -5% to +10% |
| Reactance ratio (%) | 7% and 14% (for series with reactors) |
| Dielectric | Metallized polypropylene film with Zn/Al alloy |
| Impregnation | Non-PCB, Epoxy resin |
| Maximum permissible voltage | 1.1 Un (8hours in evenly 24hours) 1.15 Un (30minutes in evenly 24hours) 1.2 Un (5minutes) 1.3 Un (1minute) |
| Discharge resistor | Fitted, parameters in the table |
| Measurement and Control | |
| Measurement tolerance | Voltage: ≤±0.5%(0.8~1.2Un) Current: ≤±0.5%(0.2~1.2In) Active power: ≤±2% Power factor: ≤±1% Temperature: ±1°C |
| Protection tolerance | Voltage: ≤±1%, Current: ≤±1% Temperature: ±1°C, Time: ±0.1s |
| Reactive compensation parameters | Reactive power compensation tolerance: ≤ 50% of the min. capacitor capacity, Capacitor switching time: ≥ 10s, can be set between 10s and 180s |
| Reliability parameter | Control accuracy: 100% Allowable switching times: 1 million times Capacitor capacity running time attenuation rate: ≤ 1% / year, Capacitor capacity switching attenuation rate: ≤ 0.1% / 10,000 times |
| Working Conditions | |
| Temperature category | - 25°C to +55°C (class D) |
| Max altitude | 2000 m |
| Max relative humidity | Relative humidity ≤ 50% at 40°C ≤ 90% at 20°C |
| Environmental condition | No harmful gas and steam no conductive or explosive dust no severe mechanical vibration |
| Mounting position | Indoor, upright |
| THDv | ≤4% and ≤5% (for series with reactors) |
| THDi | ≤20% |
| Safety Features | |
| Protective function | Over-voltage protection, under-voltage protection, short-circuit protection, over-current protection, over-harmonic protection, over-temperature protection drive failure protection |
| Communication monitoring capability | |
| Communication interface | RS485 |
| Communication protocol | Modbus protocol / DL645 |
Products Description
| Feature | Smart Capacitors (Modular) | Traditional Capacitor Banks |
|---|---|---|
| System Structure | Highly integrated, modular | Discrete components: controller, contactors, capacitors, protective devices |
| Installation & Commissioning | Simple, minimal wiring, plug-and-play | Complex, extensive wiring, tedious commissioning |
| Expandability | Excellent, easily expanded by adding parallel modules | Poor, requires redesigning cabinet layout |
| Switching Method | Zero-crossing switching, no inrush current | Contactor switching, with inrush current and arcing |
| Protection Features | Comprehensive built-in protection, self-diagnostics | Relies on external components, limited functionality |
| Communication & Networking | Native support, easy to network | Requires additional equipment |
| Maintenance | Module replacement, quick and easy | Difficult fault localization, complex repairs |
| Footprint | Small | Large |
Typical Applications
● Industrial and Mining Power Distribution Systems: Compensating for reactive power losses caused by inductive loads (motors, welders, machine tools).
● Commercial and Civilian Power Distribution: Compensating for loads like HVAC, elevators, pumps, and lighting.
● New Energy Sector: Power factor correction at the output of photovoltaic inverters and wind power converters.
● Rail Transit: Traction substations for subways and high-speed rail.
● Any low-voltage distribution network (400V) requiring improved power factor, reduced line losses, enhanced voltage quality, and increased transformer capacity release.
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