The decentralized way to unload the neutral conductor while meeting stringent EMC requirements.

Your benefits at
a glance

  • Touch panel with uniform GRIDCON® ACF operating software
  • CCU (Control Computer Unit) for up to five power modules (IPU)
  • Up to five IPUs (IGBT Power Units) with autonomous control and self-monitoring
  • Extension option for additional 60 A power unit (IPU)
  • Special version available for stringent EMC requirements (emission class B in accordance with EN55011)

Product description

GRIDCON® ACF Building version is a 4-wire device. If necessary, currents in the neutral conductor can be filtered at up to three times the rated current. Moreover, the device is very compact. If requested by the customer, it can also meet very stringent EMC standards for use in residential environments. Outside industrial environments, power quality is often specifically improved in a decentralized manner in the sub-distributions:

  • 4-wire device with up to three times the neutral conductor current
  • Operation up to 415 V +10% at full power without derating
  • Rated current can be extended in a modular manner in small units from 60 A to 300 A
  • High power density and extremely compact design
  • Low losses
  • Degree of protection up to IP 21 possible
  • Dynamic compensation of reactive power, harmonics, and flicker, as well as load balancing and neutral conductor relief in one unit

GRIDCON® ACF Building version is particularly at home in these Areas:

  • Offices and commercial buildings
  • Renewable energy
  • Data centers
  • Hospitals

Technical Data

Nominal Voltage 400 V (max. 415 V) +10%
Nominal Voltage frequency 50 Hz / 60 Hz
Peak current 2 x rated current
Connection 3-phase with + PE + N / PEN, neutral conductor connection mandatory (network topology: TN)

3-wire operation: Outer conductors balanced and unbalanced (positive and negative sequence)
4-wire operation: Additionally neutral conductor (positive, negative and zero sequence)

Filter function harmonics 1st .. 51st harmonic (50 Hz) // 1st .. 41st harmonic (60 Hz)
All harmonics can be filtered simultaneously
Additional functions Dynamic reactive power compensation
Active and reactive power balancing (up to 100% of rated current)
Voltage stabilization via Q(U)-control
Flicker compensation
Neutral conductor relief
Power-loss < 2,6 % of compensation power maximum,
< 2,3 % in typical operation, < 0,7 % when idle, < 100 W in standby
Switching frequency 20 kHz (low-loss version)
Control Internal control-computer with two digital signal processors
Device setup
and display
Via touch panel with graphic display or internal web server (TCP/IP) and PC – No additional software required
Response time << 1 ms
Interfaces Ethernet (TCP/IP)
Various field buses via Anybus modules (e.g. Profibus, Modbus)
4 x digital output (isolated, parameterized) for status messages
4 x digital input (24 VDC, parameterized) for external control and parameter set selection
Current transformer 3-phase current measurement, xx/5 A or xx/1 A (parameterized)
Current transformers are not included, 15 VA, class 1 or better recommended
Inverter 3-level IGBT with voltage link (DC electrolytic capacitors)
Coloring Standard: RAL 7035 light gray (other colors and designs on request)
(approx. W x D x H)
600 x 600 x 1800 mm
Optional: Other form factors and dimensions on request
Cooling Air cooling with speed-controlled fans
IP protection degree Standard: IP20, optional: IP21
Ambient conditions Maximum ambient temperature without derating: 40° C
Recommended ambient temperature for continuous operation: < 25° C
Minimum operating temperature: 0° C, relative humidity: maximum 95%
Transport / storage: -20° C .. 70° C
Number of modules 1 2 3 4 5
Compensation power  42 kvar 83 kvar 125 kvar 166 kvar 208 kvar
Rated current 60 A 120 A 180 A 240 A 300 A

Neutral current

180 A 360 A 540 A 720 A 900 A
Weight in kg about 225 about 285 about 345 about 405 about 465

Up to a maximum of 5 modules (208 kvar, 300 A)

EMC class

Standard: EN 55011, class A1 (industrial environment), optional: class B (residential environment)


EN 50178, EN 61439-1, EN 61439-2, EN 61000-6-2, EN 61000-6-4, EN 55011