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PF Controller FCR05 & 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.

FCR05, FCR07
  • 4 quadrant measurement and regulation
  • designed for LV and MV PFC based on contactors
  • ready for de-compensation reactor usage
  • automatic detection of measuring circuit
  • automatic detection of capacitor steps
  • high sensitivity of current measuring input (2 mA)
  • strong imunity agains high harmonic polution
  • 6 or 8 regulated outputs
  • three regulation methods for various nation rules
  • logging memory of min and max values
  • logging of operation number and time of each step
  • communication interface RS485
  • Modbus RTU communication protocol
  • internal temperature sensor
  • panel mounting design 96 x 96 mm
  • PC SW for configuration and monitoring


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 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.

Circular switching

Within a group of the same powers of capacitor steps, controller uses so called circular switching method. Controller uses the step that was disconnected longest time in order to balance equal usage of all capacitors.


Thanks for software Power Monitor System is possible controllers with RS485 easily configured and also use for monitoring of PFC systems.

Technical features

Parameter Value
supply voltage 400 V AC 50 Hz (+10%, -20%)
measuring voltage range 400 V AC 50 Hz (+10%, -20%)
system frequency 50 / 60 Hz
measuring current range 0.01 ... 5.3 A
self consumption 10 VA
number of regulated outputs 6 or 8
alarm output last step
output contact load
250 VAC / 5A
range of regulated PF 0.8 L ... 0.8 C
capacitor step settings manual / automatic
ambient temperature -40°C ... +70°C
front panel 97 x 97 mm
panel cutout 91 x 91 mm
installation depth 55 mm
weight 650 g
protection degree
IP20 read side / IP54 front panel


BMR trading - Hasal s.r.o.
Horní lán 1200/17
779 00 Olomouc
Czech Republic

+420 778 066 566