Status: March 2016



Independent measuring laboratories can emphasise the quality of their work by the use of a conformity seal. The seal is applied at the bottom of the test report (or excerpt from the test report). Relevant characteristics and details that the seal shows are:

  1. The name of the relevant testing area
  2. The FGW logo
  3. The last year of validity

An example design of a conformity seal for the power curve testing area is shown below:

Siegel Leistungskurve

Testing laboratories that wish to show the conformity seal must fulfil the following requirements:

Requirements as from 1.1.2006

Independent testing laboratories that fulfil the conditions for FGW conformity are listed in the table below. Here, the maximum period of validity of FGW conformity is assigned to each testing laboratory for the corresponding testing area:

Maximum validity of FGW conformity
Measuring institute


1 2 3 7
ENERTRAG WindStrom GmbH - - - 2020
GL Garrad Hassan Deutschland GmbH 2017 2017 2017
Ingenieurbüro Dr. Frey - 2017
Müller-BBM GmbH - - -
ProfEC Ventus GmbH - 2017 -
Sweco Danmark A/S

UL International GmbH
- 2017 2017
WIND-consult GmbH 2017 2017 2017

windtest grevenbroich GmbH 2017 2017 2017
Wölfel Engineering GmbH + Co. KG 2017 -