DETUNED FILTER REACTORS

Detuned Filter Reactors, are used in series with capacitors in power factor correction units - AKRE.

By using these types of detuned reactors it is possible to avoid following negative effects on system.

• Overcurrect during switching on the capacitor banks

• Overload of capacitors because of the harmonic resonance.

• Short lifetime on capacitors

• Overheating of the utility transmission cables.

• Overheating of the distribution transformer.

• Unintended triggering of the protective devices.

• Distortion of utility voltage waveform and problems on voltage sensitive devices

• Interferences on data transmission systems

• Unexplainable faults in electronic boards

Choosing the correct detuned filter reactor and capacitor value on detuned power factor correction systems

is very important. To obtain optimum performance form a detuned power factor correction system following

criteria must be controlled and met during the pairing of the reactors and capacitors.

• The resonance frequency must be chosen according to harmonic analysis of the system

• The voltage across the terminals of the capacitor will increase because of the inductive reaction of the rector.

The rated voltage of the capacitors must be chosen according to the resonance frequency.

• In detuned power factor correction systems, presence of higher voltage rated capacitors and reactors causes

a difference between rated capacitor power and obtained reactive power. The obtained power must be calculated

in order to avoid low compensation.

• The reactors will genereate extensive heat dur to heavy harmonic load on them. The cabinets must be

designed to disperse this heat.

CHOOSING CORRECT DETUNED FILTER REACTOR

UN

Installation od detuned (reactor-connected)capacitors

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Defuned filter reactors are high quality reactorsdesigned to be used in detuned power factor correction units.These reactors are compatiblewith european standards.

TECHNICAL SPECIFICATIONS

- Rated Voltages: 400V- Rated Frequencies: 50HZ- Mean value across three phases: 5%- Linearity: Ilin = 1,56 - 2,2In- Single or three phase, high permeable iron core, air gapped design- High quality copper or aluminium windings- Availiable at any resonance frequency- Linearty according to resonance frequency- Harmonic loads according to EN 6100-2-2 U1 = %106 x Un U3 = %0,5 x Un U5 = %5 x Un U7 = %5 x Un- Protection class: IP00 indoor mounting- Cooling: natural cooling- Thermal Switch for overload protection- Thermal block, bar or cable connection depending on current value- Vacuum impregnated varnish to ensure silent and moisture-immune operation- Compatibility with EN 61558 2-20

VALUES TO BE SPECIFIED FOR CUSTOM DETUNED FILTER REACTORS

-+

DETUNED FILTER REACTORS

Utility VoltageResonance frequencyInformation on the availiable capacitors.

Most common mistake made at detuned filter applications is chosing inappropriate reactor and capacitor pairs. Especially the reactors stated in manufacturer cataloques are used in conjunction with a specifict capacitor value. While chosing the necessary capacitor reactor pair, the selection tables in catalogs must be controlled to ensure that proper pair is chosen, if a different brand capacitor is going to be chosen, the capacity value must be the same as the original. In a mismatchcase the resonance frequency willshift and cause severeproblems for the system.

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DETUNED FILTER REACTORS

400V 50hz Utility Voltage, 189Hz Resonance Frequency (p=7%)

Type Capacitor RKC 440 .. S

Target Power L Irms Ith Ilin C Weights

ERH-7/400/4,44

ERH-7/400/8,89

ERH-7/400/13,33

ERH-7/400/17,77

ERH-7/400/22,22

ERH-7/400/26,66

ERH-7/400/35,55

ERH-7/400/44,43

ERH-7/400/53,33

5.00 4.44 8.63

4.31

2.88

2.16

1.73

1.44

1.08

0.86

0.72

7.25

14.52

21.78

29.03

36.30

43.56

58.08

72.59

87.13

7.98

15.98

23.96

31.94

39.93

47.91

63.89

79.85

95.85

15.57

31.18

46.75

62.32

77.93

93.50

124.68

155.82

187.04

27.38

54.83

82.21

109.59

137.04

164.42

219.25

274.01

325.90

5

6.5

9.5

12

16

18

21

22.5

25

8.89

13.33

17.77

22.22

26.66

35.55

44.43

53.33

10.00

15.00

20.00

25.00

30.00

40.00

50.00

60.00

kVar kgkVar mH A A A F

400V 50Hz Utility Voltage, 134Hz Resonance Frequency (p=14%)

Type Capacitor RKC 525..S

Target Power L Irms Ith Ilin C Weights

ERH-14/400/6,25

ERH-14/400/7,5

ERH-14/400/10

ERH-14/400/20

ERH-14/400/40

10.00 6.25 12.3

9.99

8.3

4.15

2.07

10.4

12.8

16.4

30.8

61,5

7.98

15.98

23.96

31.94

39.93

11.4

14.1

16.9

33.8

67.7

38,50

42,35

57,74

115,49

230,97

9

9.5

9.8

18

33.3

7.5

10

20

40

12.50

15.00

30.00

60.00

kVar kgkVar mH A A A F

DETUNED FILTER REACTOR SELECTION TABLE

Detuned filter reactors with: - Resonance frequency = 134Hz. - Blocking factor p%= 14%.

Detuned filter reactors with: - Resonance frequency = 189Hz. - Blocking factor p%= 7%.

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DETUNED FILTER REACTORS

a

A

f

b

H

B

DIMENSIONS

DRAWING DIMENSIONS

Type Dimensions Fixing holes Hole Weights

ERH-7/400/4,44

ERH-7/400/8,89

ERH-7/400/13,33

ERH-7/400/17,77

ERH-7/400/22,22

ERH-7/400/26,66

ERH-7/400/35,55

ERH-14/400/6,25

ERH-14/400/7,5

150x100x150

180x115x180

180x140x180

225x140x220

240x156x265

240x156x265

240x156x265

180x125x180

180x125x180

5x10

5x10

5x10

10x15

10x15

10x15

10x15

5x10

5x10

5

6.5

9.5

12

16

18

21

9

9.5

fA x B x H kg

ERH-14/400/10

ERH-14/400/20

180x125x180

240x155x270

5x10

10x15

9.8

18

a x b

110x70

135x74

135x94

175x80

185x100

185x100

185x100

135x85

135x85

135x95

185x100

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DETUNED FILTER REACTORS

DIMENSIONS

A

a

f

bB

H

DRAWING DIMENSIONS

Type Dimensions Fixing holes Hole Weights

ERH-7/400/44,43

ERH-7/400/53,33

ERH-14/400/40

265x170x245

265x170x245

300x190x260

10x15

10x15

10x15

22.5

25

33.3

fA x B x H kga x b

200x108

200x108

224x120

*Specified capacitor values are used during the reactor design. Severe problems mayoccur when using another capacitor in conjunction with these reactors. Custom reactordesigns are possible.*Dimensions values may change depending on design.

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