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KRL-FOT type detuned capacitor bank for dynamic loads

FOT type detuned thyristor Power Factor Correction system
Detuned thyristor controlled power factor correction units for high polluted networks and dynamic loads. On request, different phase assignments and outdoor versions are also available. The FOTP type does not include automatic control and can be customized to meet specific requirements. For step (stage) optimization, a 75 kvar unit is also available. The thyristors switch capacitors to the grid at zero transition, extending their lifetime. Rapid compensation in up to 40 ms.

Cabinet: standing, exact size depends on power level (height x width x depth):

  • up to 175 kvar: 2000 x 600 x 600 mm2
  • up to 250 kvar: 2200 x 600 x 600 mm2

Relevant standards: MSZ EN 61439/1-2; IEC 61921; IEC 60831; VDE 560; IEC 439/1

KRL-FOT type detuned capacitor bank for dynamic loads

KRL-FOT type benefits and field of applictaion

Why you should choose KRL FOT device?

  • Rapid switching of capacitors in dynamic compensation systems
  • Efficient reactive power compensation on polluted networks
  • Choosable top or bottom side connection options
  • Protection: IP 20, IP54 on request
  • German quality, premium capacitors
  • Fuse swich disconnetctors for each step
  • Power supply transformer 
  • Hungarian Product Grand Prix Award 2010
  • ELEKCTROcom Grand Prix Award 2011
  • Compliance with relevant standards: MSZ EN 61439/1-2; IEC 61921; IEC 60831; VDE 560
  • TÜV certified equipment 

Most common fields of application:

  • Heavy and light industy
  • Renewable energy 
  • Welding processes in automotive industry
  • Oil and gas industry
  • Pulp and paper industry
  • Pharmaceutical industry
  • Steel industry (electric arc furnaces, rolling mills)
  • Mining (mine winders, excavators, conveyors)
  • Shredders, crushers and cranes

Technical specifications

Nominal power:
from 50 kvar to 250 kvar
Nominal voltage: 
400 V
Max. voltage: 
1.1 Un
Step power: 3.125 ; 6.25 ; 12.5 ; 25 ; 50
Mains frequency: 50 Hz
Protection class:
IP 20, outdoor version IP 54
Ambient temperature:
-20...+40°C "D" temperature class
Electronicon, MKPg 3 phase, Un=440 V (7%), Un=525 V (14%) PCB free
Discharge resistors:
Internally connected
Microprocessor controlled, with continuous digital cosφ display
Special capacitor contactors
Switching time:40 ms
Standing cabinet 2000 x 800 x 600 mm (h x w x d) RAL 7035 light grey
Dielectric loss: 
≤ 0,2 W/kvar
Target cosφ: 
0.5 capacitive and 0.5 inductive digitally adjustable
Detuning reactors:Harmonic filter reactors with temperature switch
Current transformer signal: 
Voltage signal: 
Internally connected
Relevant standards: MSZ EN61439-1; 61439-2/2011; IEC61921:2003; TÜV approved APPROVED 
TÜV certificate number:MK 69249379 0001

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