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Sinopak active harmonic filter 
Active harmonic filter (AHF) is designed to filter the harmonics injected by non-linear loads in power networks. It can analyze the line current harmonics drawn by the loads and generate a compensation current dynamically at the opposite phase angle, thereby "neutralizing" the harmonic currents. 

Features 
1. Based on 3-Level topology circuit 
2. Modular design for a shorter delivery cycle and easy maintenance. 
3. Rack-mounted or wall-mounted design which can be easily combined and installed as needed. 
4. It is possible to compensate the 2nd~51st harmonics, or select a specific order of harmonics to compensate separately. 
5. Flexible compensation modes: Harmonic compensation, Reactive power compensation, Three phase imbalance compensation 
6. Harmonic +Reactive power +Imbalance 
7. Remote communication interfaces, with real-time monitoring being achieved via PC machines. 
8. A full automatic detection runs during the whole compensation process, and should it be restarted, self-diagnosis will function; then after the fault is removed, it will be automatically put into use. 
9. Free of harmonic resonance. 
10.A user-friendly human-machine interface is configured to operate, and display system's real-time parameters like voltage/current waveforms, active power, reactive power, apparent power, power factor, harmonics, etc. 
11. Intelligent control circuit with perfect protection functions (against overvoltage, under voltage, over-heating, over current, etc.) 

Technical Specifications 
Items Module capacity:25A/35A, 50A/60A, 75A/100A 
Power supply voltage:400V (-43%~+14%) 
Power supply frequency:50/60Hz (Range: 45~63Hz) 
Wiring method:3P3W/3P4W 
Harmonic spectrum:2nd~50th 
Harmonic setting:All harmonic contents can be selected simultaneously 
Efficiency:Up to 98% 
Filter performance:THDi<5% 
Neutral filtering capacity:Three times of rated current 
Response time:<15ms 
Reactive time:<50microsecond 
Resonance protection:Yes 
Cooling mode:Forced air cooling 
Operation mode:Harmonic compensation(FFT analysis, instantaneous reactive power), Reactive power compensation (-1~+1),Three phase imbalance compensation 
Switching frequency:20kHz 
Power loss:<3% 
Communication interface:RS485 (Modbus RTU), TCP/IP (Ethernet) 
Digital I/O:4DI/6DO 
Alarm events:Yes 
Monitoring:Via centralized monitoring PQ viewer 
Mounting type:Rack/Wall mounted 
Protection level:IP20 
Altitude:1500m, if >1500m, the power decreases by 1% every 100m. 
Operation temperature:-25degree~+45degree 
Relative humidity:5%~95%, non-condensing 
Installation environment:Indoor use 
Dimension W*D*H(mm) And net weight:25A/35S: 440*470*150 18KG 
50A/60A: 440*590*190 35KG 
75A/100A: 440*600*230 36KG 
Compliance with Standards:IEEE 519, IEC 61000-3-6, ERG5/4