REOWAVE®passiveThe new generation of harmonic filters

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REOWAVE

REOWAVE®passiveThe new generation of harmonic filters

Electrical components are continually becoming smaller, more efficient and cheaper. To achieve this, most applications include components such as thyristors or frequency converters. The components are also known as “non-linear loads“ because their characteristic curve is not a straight line, which leads to many undesirable problems. In particular, these include harmonics.

Harmonics are an example of the type of problem that are often simply not recognised correctly, but can cause significant malfunctioning – particularly with the increasing use of non-linear loads. Harmonics cause, for example, interference phenomena such as:

• Creating additional losses resulting in unnecessary consumption of energy• Reduced lifetime of transformers due to destruction of the insulation• Resonances in the supply networks• Measurement errors• Errors in tripping fuses• Serious faults in IT systems.

The solution for these problems is the REOWAVE®passive!This device is used at the place where the problems arise – where the biggest effect can be achieved. REOWAVE®passive is based on proven components of the REO CNW family such as REO mains filters and REO harmonic filters which, thanks to their excellent characteristics and the special circuit design of REOWAVE®passive, efficiently keep the harmonics away from the mains network.

Diagram 1: Uncontrolled rectifier Diagram 2: Diode rectifier with REOWAVE®passive

Diagram 3: Current (blue) und voltage (red) for a B6 rectifier configuration with scaled values

Diagram 4: Current (blue) und voltage (red) for a B6 rectifier with REOWAVE®passive; scaled values

Mains Mains Non-linear load Non-linear load

L

H

B

Reduction of the THDI value

Increasing network stability

Reduction of current consumption

Reduction of equipment costs

Simple integration into existing systems

*Image shows a higher protection class with housing as special design

*Weight by installation in switch cabinet

Voltage Current (A) Length mm(L)

Width mm(B)

Height mm(H)

Weight (kg)

400V50Hz

16 240 220 500 21

36 380 250 600 41

70 600 600 1800 158*

145 600 600 2000 204*

230 600 600 2000 241*

330 600 600 2000 267*

450 860 600 2000 296*

0,001 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

2,00

4,00

6,00

8,00

10,00

12,00

14,00

16,00

18,00

20,00

22,00

l [A]

0,001 2 3 4 5 6 7 8 9 10 11 12 13 14 15

2,00

4,00

6,00

8,00

10,00

12,00

0,001 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

2,00

4,00

6,00

8,00

10,00

12,00

14,00

16,00

18,00

20,00

22,00

l [A]

0,001 2 3 4 5 6 7 8 9 10 11 12 13 14 15

2,00

4,00

6,00

8,00

10,00

12,00

REOWAVE®passive – harmonic filter with a potential for savings

REOWAVE®passive doesn’t only give protection against harmonics – significant reduction of costs is also possible. The way that REOWAVE®passive works results in reductions in current and current harmonics, enabling significantly smaller fuses, cabling and transformers to be used. REOWAVE®passive therefore enables not only energy cost savings but also savings in equipment costs.

Current 25,7 A

I5 67 %

I7 43 %

THDI 81%

Current 19,7 A

I5 2,7 %

I7 1,8 %

THDI 4,4

Measurement on a converter without REOWAVE®passive

Converter without REOWAVE®passiveConverter with REOWAVE®passiveLimit value by EN 61000-3-12

Harmonics

Measurement on a converter with REOWAVE®passive

Naturally, REO harmonic filters can also be specially made to customer requirements.

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REOWAVE

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REOWAVE

REOWAVE

Image 5: The design allows for the parallel connection of two REOWAVEpassive to increase the power capacity.

Image 6: Naturally several non-linear loads can be suppressed with a single REOWAVEpassive. The filter must merely be suitably rated for the required power.

Another advantage : simple integration into existing systems

In the development of the filter, REO has taken special care over simple integration into existing systems. Based on the “plug and play” idea, only the inputs and outputs of the filter need to be connected and the device will begin its cost-saving operation without problems from harmonics.

Thanks to the integral thermostat, a fan is switched on automatically as required. Another advantage of the REOWAVE®passive is the built-in mains choke. The latter ensures that only the interference in your area is suppressed, and no stray harmonics are filtered out of the mains.

Mains

Mains

Non-linear load

Non-linear load

REOWAVE®passive – approved REO quality

REOWAVEpassive is a filter unit which consists out of approved REO CNW components. This filter unit includes a REO mains filter and a REO harmonics filter. The mains filters function is the pre-supression of the mains as well as the shielding against external harmonics. It filters the harmonics caused by the B6 circuit (thyristor, diode bridge etc.), effects a preliminary suppression of network interference, screens the application from extraneous harmonics and enables a cost-saving in equipment selection and energy consumption.

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REONetzfilter

REOOberwellen-

filter

Umrichter/Prüfling

REOWAVE

The device has a user-friendly design and is available in four basic variants.

Typ Rated voltage Voltagetolerance

Rated current Cooling Test voltage Protection class

REOWAVE®passive 400

3 x 400 V 50 Hz

3 x 360 - 440 V 9 - 450 A

forced cooling, internal*

2500 V AC1 min

IP 20 at 9 - 110 A IP 54 at

> 110 A*

REOWAVE®passive 500

3 x 500 V 50 Hz

3 x 450 - 550 V 9 - 450 A

REOWAVE®passive 690

3 x 690 V 50 Hz

3 x 620 - 760 V 9 - 400 A

REOWAVE®passive 480

3 x 480 V 60 Hz

3 x 430 - 530 V 9 - 450 A

* in special design

Mains Non-linear load

REOMains filter

REOHarmonics

filter

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