Test Centers | Laboratories

Accredited Test Laboratories for Converters and EMC

Fraunhofer IWES in Kassel carries out accredited tests in its laboratories in accordance with DIN EN ISO/IEC 17025. These are tests on the electromagnetic compatibility of electrical equipment, on the grid properties of converters for decentralized electricity generators (e.g. according to BDEW and FGW TR3), and on the efficiency of photovoltaic converters and systems.

Services | Products

  • EMC-tests (full-compliance)
  • Inverter tests
  • Tests on generation units
  • InHouse- und on-site-measurements
  • Prototype and product development tests

EMC-Tests (full-compliance)

Emission Tests

  • Mains Harmonic Distortion according to EN 61000-3-2 (IPH ≤ 16 A,100 Hz .. 2 kHz other frequency ranges on demand) and EN 61000-3-12 (16 A < IPH ≤ 75 A)
  • Voltage Fluctuations and Flicker according to EN 61000-3-3 (IPH ≤ 16 A) and EN 61000-3-11 (IPH ≤ 75 A), characteristics of the distortion factor, fundamental wave content, power ratio, power factor of individual harmonics e. g. as a function of the consumed power
  • Conducted Emissions according to EN 55011, EN 55014, EN 55022 (150 kHz .. 30 MHz), other frequency ranges on demand
  • Radiated Emissions  according to EN 55011, EN 55022 (30 MHz .. 1 GHz), other frequency ranges on demand
  • Interference Power Levels on Cables according to EN 55014

Immunity Tests

  • EFT / Burst (electrical fast transients) interferences according to EN 61000-4-4
  • Surge (lightning pulses) according to EN 61000-4-5
  • ESD (electrostatic discharge) according to EN 61000-4-2
  • Electromagnetic Field according to ENV 50140, IEC 1000-4-3
  • Conducted Disturbances Induced by RF-Field according to ENV 50141, IEC 1000-4-6
  • Voltage Fluctuations, - Short and Long Dips according to EN 61000-4-11 and EN 61000-4-34
  • Power Magnetic Field according to EN 61000-4-8
  • Immunity against differential mode disturbances according to IWES-Standard

Inverter Tests

Overall efficiency of photovoltaic inverters according to E DIN EN 50530 (German version FprEN 50530:2008)

  • Static MPPT efficiency
  • Dynamic MPPT efficiency
  • Static power conversion efficiency

Tests on Generation Units

  • Fast voltage changes according section 7.3.4 and 8.2.3, EN 61400‑21
  • Long term flicker according section 7.3.3 and 8.2.2, EN 61400-21, IEC 61000-4-15
  • Harmonics, interharmonics and higher frequency components according section 8.3 EN 61400-21, EN 61000-4-7

Confirmation of the electric characteristics of generation units according to „Technische Richtlinie - Erzeugungsanlagen am Mittelspannungsnetz“, BDEW, IEC 61400-21

InHouse- und On-Site-Measurements

  • Active power dispatch according section 4.2 and 5.2, FGW TR3 and according section 6.6 and 7.6, IEC 61000-21
  • Reactive power provision according section 4.3 and 5.3, FGW TR3 and according section 6.7 und 7.7, IEC 61400-21
  • Voltage fluctuations / switching operation according section 4.4.1 and 5.4.1, FGW TR3 and according section 6.4 and 7.4, IEC 61400-21
  • Voltage fluctuations / Continuous operation according section 4.4.2 and 5.4.2, FGW TR3 and according section 6.3.2 and 7.3.2., IEC 61400-21
  • Current harmonics, interharmonics and higher frequency components according section 4.4.3 and 5.4.3, FGW TR3 and according section 6.4 and 7.4, IEC 61400-21
  • Grid protection according section 4.5 and 5.5, FGW TR3 and according section 6.8 and 7.8, IEC 61400-21
  • Connection conditions according section 4.6 and 5.6, FGW TR3
  • Response to voltage drops according section 4.7, 5.7 and Annex G, FGW TR3 and according section 6.5 and 7.5, IEC 61400-21
  • Maximal short circuit current according section 4.7, 5.7 and Annex G, FGW TR3 and according section 6.5 and 7.5, IEC 61400-21

Prototype and Product Development Tests

  • Applied Spectrum Analysis by using electromagnetic transducers, e. g. high impedance probes, near field probes, RF current probes, or Antennas for the frequency range between 10 Hz and 1.8 GHz
  • Simulation of ripple control signals (DC to 5 kHz)
  • Simulation of frequency variations of the mains
  • Simulation of voltage variations ,-dips and -interrupts of the mains
  • Simulation of voltage distortions of the Mains
  • Conversion efficiency of power conditioners according EN 61683