Laboratory and Equipment calibration services


The Powertech Transformers laboratory at our Pretoria West factory has been in existence since 1973. The main activities of the laboratory are testing of materials for transformers and calibration of instruments. The testing of transformer oil forms a large part of the testing activities. Tests that can be performed are diagnostic testing and condition assessment tests using gas chromatography techniques on dissolved gas in oil samples, Frequency Response Analysis (FRA) to detect core and winding displacements in a transformer, Dielectric Frequency Response (DFR) tests to investigate the behaviour of dielectric insulation in a transformer as well as tests to measure the capacitance and the power factor of transformers and bushings.