Active harmonic filter

multiwave active

Active & passive harmonic filters
multiwave active

Inverters are increasingly taking on a dominant role in industrial networks, which has two effects: A decrease in motors that are operated directly on the grid reduces the need for inductive fundamental reactive power, while at the same time harmonic currents increase. The impedance of the mains transformer plays a decisive role here, as a large proportion of the harmonic voltage is generated there, which in turn causes interference at all consumers. This leads to unreliable operation of the consumers and increased defects.

KBR offers active harmonic filters as a solution.
The multiwave active eliminates harmonics up to the 50th harmonic. The filter improves the voltage quality and thus significantly increases operational safety.

The benefits are extraordinary. It is almost impossible to quantify the savings resulting from less wear and tear on the devices, fewer troubleshooting measures or even prevented production downtimes. Studies show that contaminated energy networks cause billions in damage every year. multiwave active is therefore an investment in your own operational safety.

A filter system must be individually designed for each application. Our “Power Quality Service” department specializes in these tasks and will be happy to help you with your project.

About multiwave active
Technical data
Free-standing wall cabinet
Wall cupboard
Floor cabinet
  • Harmonic compensation up to the 50th harmonic
  • Simple expansion thanks to modular system
  • Current- or voltage-controlled regulation
  • Automatic adaptation to changing operating conditions
  • Phase-selective inductive and capacitive power factor correction
  • Load balancing, compensation of phase shift
  • Robust, reliable and with an increased temperature range up to 50°C without derating
  • Harmonic filtering selectively in percent or to limit values of the standard

The right product for every requirement

Even the smallest version of multiwave active guarantees reliable compensation of harmonics up to the 50th harmonic and reactive power. Small dimensions and low weight allow simple and space-saving installation in any environment: both wall and switch cabinet mounting up to protection class IP54 are possible. With a power loss of just < 970 W, this version is extremely economical. The reaction time of << 1ms, it is also possible to optimally compensate for dynamic loads.

Mechanical structure
Modules Wall cupboard Floor cabinet LCD display

multiwave active 60 A (3-/4-wire)

multiwave active 120 A (3-/4-wire) 2 YES YES YES
multiwave active 180 A (3-/4-wire) 3 YES YES
multiwave active 240 A (3-/4-wire) 4 YES YES
multiwave active 300 A (3-/4-wire) 5 YES YES

The advantages

As an active harmonic filter of the latest generation, it offers many advantages over conventional technology. multiwave active is powerful, compact, fully digital, responds in less than 1 ms and reliably compensates for harmonics and reactive power. The LCD display, which is always installed, provides the user with a constant overview of the filter’s function.

Compact models for every requirement
Active resonance damping, dynamic power factor correction ind/kap (phase-selective), load balancing, flicker compensation / symmetrical voltage stabilization, neutral conductor relief. With its extensive range of models, multiwave Active is suitable for a wide variety of applications. The device versions range from 60 to 300 amps and 380 to 480 volts – in 3- or 4-wire technology.

Fast compensation almost in real time
The faster an active harmonic filter reacts to disturbances in the network, the more precisely it compensates for them. As multiwave Active is fully digital, a response time of less than 1 ms is possible.

Low power loss
Thanks to the use of 3-level IGBTs with reduced losses, the active filters work very efficiently.

High performance in the smallest of spaces
Compared to other active filters, multiwave Active requires very little space. The 60 amp version of the appliance has external dimensions of just 44 x 42 x 22 cm and weighs only 44 kg. This makes wall mounting possible without any problems.

The areas of application

There is a wide range of companies and facilities that can clearly optimize their network quality with multiwave active. This means that the active harmonic filter can be used efficiently in building technology as well as in plant and automation technology, for example. It makes sense to include the device in the planning and implementation of new systems. Of course, multiwave active can also be intelligently integrated into existing systems and installations where power quality problems occur.

The ease of use

Click-and-start configuration
The flexibility of multiwave active is demonstrated by the fact that it can be coupled to the energy grid on the load or grid side via a variety of current transformers or voltage-controlled. Configured with just a few clicks on the LCD display, the current mains current is permanently measured and any harmonics and phase shifts that occur are actively compensated for. Within microseconds, the multiwave active calculates the corresponding compensation currents, provides them and feeds them into the grid. Fully digitized control and regulation as well as fast and high computer performance make it possible

Multilingual menu and control via software
The multilingual, menu-driven control panel and display make commissioning, selecting and setting individual parameters very user-friendly for all multiwave active appliance types. With the help of the software, installation and maintenance can also be carried out conveniently via PC. In remote operation via Ethernet and TCP/IP interface, the current status of the power quality can optionally be called up online so that adjustments can be made.

General technical data
Rated voltage AC 400 V (max. 415 V) ±10%
Mains frequency 50 / 60 Hz
Peak current 2x rated current
Cable connection 3-phase + PE + N / PEN, neutral conductor connection is required (mains form: TN)
Compensation 3-wire operation: balanced and unbalanced outer conductor (positive and negative systems)
4-wire operation: also neutral conductor (positive, negative and neutral system)
Compensation 1st … 51st harmonic (50 Hz) // 1st … 41st harmonic (60 Hz)1. … 51st harmonic (50 Hz) // 1st … 41st harmonic (60 Hz)
All harmonics can be filtered simultaneously
Additional functions – Dynamic power factor correction
– Active and reactive power balancing (negative sequence system up to 60%, zero sequence system up to 30% rated current)
– Voltage stabilization through Q(U) control
– Flicker compensation
– Neutral conductor discharge
Operating voltage AC 400 V
Power loss < 2.6% of the maximum compensation power,< 2.6% of the maximum compensation power,< 2.3% in the typ. Operation, < 0.7% in idle mode, < 100 W in standby mode
Switching frequency 20 kHz (low-loss version)
Control system Internal control computer with two digital signal processors
Device setup and display Via internal web server (TCP/IP) and PC, SD card or Anybus interface (fieldbus interface)
Response time << 1ms
Interfaces – Ethernet (TCP/IP)
– Various fieldbus systems via optional Anybus plug-in module (e.g. Profinet, Modbus TCP)
– 4x digital outputs: 250 VAC (3 A) / 110 VDC (0.7 A) / 24 VDC (1 A), potential and parameterizable
– 4x digital inputs: 24 VDC (10 mA), parameterizable for remote operation and simple parameter changeover
Current transformer 3-phase current measurement, xx/5 A or xx/1 A (parameterizable)
The required current transformers are not included, 15 VA, class 1 or better recommended
Inverter 3-level IGBT with intermediate voltage circuit (electrolytic capacitors)
Ambient conditions – Maximum ambient temperature without power reduction: 40° C
– Recommended ambient temperature in continuous operation: < 25° C
– Minimum operating temperature: 0° C
– Relative humidity: maximum 95%
– Transportation/storage: -20° C … 70 °C
Overvoltage category CAT III, 300 V
EMC class Standard: EN 55011, class A1 (industrial environment), optional: class B (residential environment)
Standards EN 50178, EN 61439-1, EN 61439-2, EN 61-6-2, EN 61000-6-4, EN 55011
Technical data free-standing wall cabinet
Dimension 800 x 600 x 1200 mm + 100 mm roof vent (WxDxH)
Rated current 60 A 120 A
Neutral conductor current 180 A 360 A
Weight 132 kg 176 kg
Power loss during derating <1300 W <2400 W
Power loss under typical operating conditions <966 W <1932 W
Assembly Floor-standing cabinet or wall mounting
Ambient temperature 0 … 50 °C at full power, up to 55 °C without derating
Protection class IP 20 or optionally IP 54
Noise level < 56 to 63 db A (depending on load situation)
Recommended protection 200 A type gL or gG
Technical data wall cabinet
Dimension 800 x 400 x 800 mm (WxDxH)
Rated current 60 A
Neutral conductor current 180 A
Weight 114 kg
Power loss during derating <1300 W
Power loss under typical operating conditions <966 W
Assembly Wall mounting
Ambient temperature 0 … 50 °C at full power, up to 55 °C without derating
Protection class IP 20 or optionally IP 54
Noise level < 56 to 63 db A (depending on load situation)
Recommended protection 200 A type gL or gG

Technical data floor cabinet
Dimensions 800 x 600 x 2000 mm + 100 mm plinth + 100 mm roof vent (WxDxH)
Rated current 60 A 120 A 180 A 240 A 300 A
Neutral conductor current 180 A 360 A 540 A 720 A 900 A
Weight 225 kg 285 kg 345 kg 405 kg 465 kg
Power loss under typical operating conditions < 966 W < 1932 W < 2898 W < 3864 W < 4830 W
Assembly Floor cabinet
Ambient temperature 0 … 40 °C at full power, up to 50 °C without derating
Protection class IP 31 or optionally IP 54
Noise level < 75 db A (depending on load situation)
Recommended protection 400 A type gL or gG
Tablet mit Screenshot


More information (brochures, user manuals, etc.) under download.