Testing the discharge device for the DC link capacitor of a DC network

摘要

Method (100) for testing a switchable discharge device (14) for an intermediate circuit capacitor (12) in a first DC voltage network (1) with the steps: • there is a time program for the current I, for the voltage U, and / or for the power flow P, predefined (110) at at least one supply point (1a) of the DC voltage network (1); • the discharge device (14) is activated (140); • the time profile I (t) of the current I, and / or the time profile U (t ) the voltage U, at at least one measuring point (1b) of the first DC voltage network (1), and / or the time profile G (t) of a quantity G derived from current I and / or voltage U, is compared with a nominally expected time profile I ( t), U (t) or G (t), compared (150) • the result of the comparison (150) is used (160) as a test criterion for the correct functioning of the unloading device (14).