Active Power Filter(APF)


   Product overview:Active power filter (APF) is a new type of power electronic device used to dynamically suppress harmonics and compensate reactive power. It can compensate the varying harmonics and reactive power with varying size and frequency.

APF Working Principle:

Norya series active filters are parallel harmonic compensation device. It monitors the load current in real time with an external current transformer, the internal DSP calculates the harmonic content of the load current and sends the control signal to the inverter. The control inverter generates a harmonic current injected into the grid, which is equal to the harmonic current of the load and opposite direction, and realizes the active filtering function.

Technical Parameter:

Item  Item description 
Electrical specifications  Input line voltage  380V±15% 
Number of phases  Three-phase four-wire;Three-phase three-wire 
Frequency  50/60±5Hz(User set) 
Compensation current (per phase)  30A~150A(Depending on the model) 
Compensate harmonic order  2~50 orders(User set) 
Power factor correction  -1~+1 
Current limitation  Rated output current 
Multiple operation  Up to 8 modules in parallel 
Efficiency Up to 97.5% 
CT ratio range  150:5~6000:5 
Dry contacts  EPO/DI/DO 
Communication interface  Communication  RS232/RS485/Ethernet/GPRS 
Usage areas  Indoor, without direct sunlight, no dust, no corrosive and flammable gases, no oil mist, no water vapor, no drip or salt etc.. 
Environmental specifications  Working elevation  Below 1000 meters. Derate when higher than 1000 meters, derate 1% for every 100 meters increase. 
Storage temperature  -20°C~+70°C 
Working temperature  -10°C~+40°C 
Humidity  Less than 95%RH, without water droplets condensation. 
Vibration  Less than 5.9 m/s2(0.6g) 
Structure  Degree of protection  IP20 
Colour  7035 gray /7021 black (Customizable) 
Net weight  20KG~50KG(Depending on the model) 
Cooling method  Intelligent air cooling 

APF Technical Advantages:

The harms of power quality :

Rise of failure rate of power equipment
Server crash and data loss
PLC tripping or resetting without reason
Equipment false alarm
Circuit breaker false tripping
Midline cable heating
Precision instruments can not work normally
Inverter shutdown
Switchgear temperature increases
The device can not work at rated power
Motor and transformer equipment overheated
Mechanical vibration noise increases

  The benefits of managing power quality:

To improve the quality of power supply of enterprise equipment, provide the reliability of equipment operation and reduce the economic loss caused by misoperation of equipment;

To reduce the heating of  equipment, reduce insulation aging, thereby enhancing the service life of equipment and reduce the maintenance cost of equipment;

To reduce the probability of capacitor resonance, improve the safety of the electricity;

To reduce the electromagnetic interference caused by harmonics, to ensure the normal operation of weak system;

To meet national and local standards.

Production Scene: