Device and method for testing a transformer

摘要

Method for testing a measurement transformer in which a test signal with a smaller frequency than the nominal frequency of the transformer is applied to the transformer and used to measure a number of frequency independent parameters, especially Eddy current resistance and the transformer hysteresis curve. These are used to create a transformer simulation model that simulates transformer behavior at different frequencies. The behavior of the transformer secondary side is investigated using the model, in particular the behavior of terminal voltage and current. An Independent claim is made for a testing device for testing a transformer, with a testing signal source (2), a measurement arrangement (4) for measuring transformer parameters and an evaluation unit (5).