DIN EN 61000-4-27 VDE 0847-4-27:2009-12

This standard contains the German version of the European Standard EN 61000-4-27:2000 + A1:2009 and is identical with the International Standard IEC 61000-4-27:2000 and its Amendment 1:2009. It specifies the test and a range of preferred test levels for the immunity of electrical and electronic equipment against unbalance of the voltage at their power ports. The unbalanced voltage is reduced in three symmetrical sequence voltage components and recommended test levels are derived. In this standard the test equipment and the test procedure is also described and specifications are given to the test report and the evaluation of the test results. In the annexes the procedure is described in detail, equations for the calculation of the degree of unbalance and informations on the test levels are given.