FCR05 and FCR07

Power factor controllers FCR05 and FCR07 are 4 quadrant controllers designed for low voltage applications. The design gives possibility to control up to 6 compensation stages for FCR05 and up to 8 stages for FCR07 regulator. Last output can be programmed to be used as an alarm output or as a normally regulated compensation stage.

Device function

Device digitizes measured phase voltage and current in one phase. Then, from those values, parameters like: power factor, effective values of voltage and current, apparent power and reactive power, are calculated. With consideration of requested cosφ it calculated need compensation power. According to its size, regulator switches on or off appropriate capacitor stages.
Within the scope of each power level, regulator uses method of circle switching. All the time connects this stage at appropriate power level which was switched off for longest time. Everything is made so that regulator will reach optimal compensation in one regulation cycle with minimum number of switched stages.

Last step alarm output

Last step of power factor controller is normally working as a standard step but it can be removed from regulation algorithm and used for alarm purposes. Configuration of last step alarm output is easy to be enabled in setup menu.

Harmonics measurement

Controllers FCR05 and FCR07 offer wide range of monitoring features of main parameters plus THDU, THDI and also particular odd harmonics of voltage and current up to 19th harmonics.

DIN rail mounting variant

Power factor controllers FCR05 and FCR07 are available also in DIN rail mounting design. Displayed parameters, operation and technical features are the same as for panel mounting type. Dimmensions of controler for DIN rail is 5 standard DIN modules.


Main features

  • 4 quadrant measurement and regulation
  • 6 or 8 controlled steps
  • Last step programmable as an alarm output
  • Monitoring of U, I, P, Q, S, cosφ, THDU, THDI
  • Monitoring of U and I odd harmonics till 19th order
  • APFR regulation method
  • Variant of supply voltage 230 VAC and 400 VAC
  • Ready for de-compensation bateries
  • RS485 interface (Modbus RTU)
  • DIN rail variant