Power Quality Filters PQFI-PQFM-PQFS

Power Quality Filters PQFI-PQFM-PQFS

The best solution to tough power quality problems caused by harmonics, load unbalance and reactive power demand

Hitachi Energy's PQF active filters offer the following system benefits:

  • Compliance with the strictest power quality regulations thanks to their unique control concept, thereby avoiding penalties and/or refusal by utilities to connect installations to the electrical grid.
  • Reduced production downtime and/or commercial installation downtime.
  • Increased system efficiency and reduction of CO2 emissions.
  • No detailed network analysis required and rapid and easy implementation of the solution.
  • Thanks to its active concept, well adapted to low-voltage installations that are typically upgraded frequently.
Applications

PQF active filters are the standard in the active filtering field for product performance. Hitachi Energy’s PQF come with:


Why Hitachi Energy?

Hitachi Energy has a vast experience in compensating fast reactive loads in the harshest environments. As a result, the Hitachi Energy's Dynacomp boosts high reliability and comes with:

  • Unprecedented filtering efficiency with unique closed loop control system and individual harmonic selection capability 
  • Stepless reactive power compensation of both inductive and capacitive loads
  • Load balancing in both 3- and 4-wire systems
  • Increasing of system reliability to unprecedented levels with full redundancy functionality
  • Advanced communication features with Modbus RTU and Modbus TCP
Brief performance data
PQFM
Connection method 3-wire 3-wire 3-wire/4-wire
Network voltage V1: 208-480V
V2- 480-690V
V1: 208-480V
V2: 480-690V (limited to 600V for cULus versions)
208-240V
380-415V
Line current rating V1: 300 - 450 A
V2: 180 - 320 A
V1: 70 - 100 - 130 - 150 A
V2: 100 A
30 - 45 - 60 - 70 - 80 - 90 - 100 - 120 A
Modularity Maximum 8 units can be combined (4 units for PQFS)
Redundancy Master/master or master/slave arrangement
Harmonic range 2nd to 50th order
Harmonics freely selectable 20 orders 3-wire: 20 orders
4-wire: 15 orders
Filtering degree Programmable per harmonic in absolute Ampere value
Harmonic attenuation factor Better than 97% at rated load
Compensation method Closed loop
Reaction time < 0.5 ms instantaneous response
Response time (filtering) 2 networks cycles typically (10-90% filtering)
Target cos ϕ Programmable from 0.6 (inductive) to 0.6 (capacitive)
Load balancing modes Between phases: ON/OFF Between phases: ON/OFF
Between phase and neutral: ON/OFF
Digital I/O 2 digital inputs/6 digital outputs (potential free)
Alarm contact 1 NO/NC alarm contact (potential free)
Programming Using PQF-Manager GUI
Certification CE, cUL & CTick CE & CTick

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