Power Quality Filters PQFI-PQFM-PQFK-PQFS

The PQF active filter range offers ultimate filtering performance. It also excels through its stepless reactive power and load balancing features

• Allows installations to run more efficiently
• Filters up to 20 harmonics simultaneously (15 for PQFK and PQFS in 4-wire mode)
• Filters up to the 50th harmonic
• Filters zero phase sequence harmonics (3rd, 9th, ...) in the neutral (PQFK and PQFS)
• Harmonic attenuation factor better than 97%
• Fulfillment of international guidelines like G5/4, IEEE 519, etc
• Operates with closed loop control for best accuracy
• Has a programmable filtering strategy and free choice of harmonics selection
• Auto-adaptation to network impedance changes
• May filter without generation of reactive power/load balancing
• May generate reactive power and control power factor
• May balance the load current across the phases and between phases and neutral (PQFK and PQFS)
• Has programmable task priorities
• Two sets of compensation parameters for different load type compensation
• Is not overloadable
• Programmable stand-by and re-start functions
• Fault and event logging with real time stamp
• Direct connection up to 690V (CE-C-Tick) and 600V (cUL)
• Top or bottom cable entry (bottom cable entry only for PQFS)
• Easy commissioning - auto-detection of CT polarity and installed phase
• Does not require detailed network analysis
• Does not require special CTs
• Is easy to extend on site
• Comes factory tested
• Optical fiber isolation between power and control stages
• Advanced programmable digital I/O interface
• Modbus RTU communication compatible
• 3 phase 3-wire and 4- wire connectivity (PQFS)
• Easy wall mounting design (PQFS)
• Backlit user interface (PQF-Manager)
  
  A complete range covering all type of applications:
• PQFM/PQFI for medium and large industrial loads
• PQFK for commercial loads and industrial loads having substantial harmonics in the neutral
• PQFS for commercial, residential and industrial loads