VG 95370-14 Beiblatt 1:2012-12

The test procedure contained in this document is intended for the demonstration of the immunity margin against disturbing voltages at power supply terminals of and in systems as well as at system-internal power distributions. The immunity margin should, whenever possible, be demonstrated without accessing the cabling. The test method is based on a preceding disturbing voltage measurement according to VG 95370-10 supplement 1. Disturbing voltage measurement is particularly useful in cases of complex systems with branched power supply, since the disturbing voltage is applied in parallel to any consumer connected to the particular branching point. Likewise, a test level increased by the immunity margin acts in parallel on all branches connected. At system level, immunity margins against conducted disturbance are generally determined on the basis of current measurements. The corresponding procedure is specified in VG 95370-14:2011-12, Electromagnetic compatibility (EMC) - Electromagnetic compatibility of and in systems - Part 14: Test procedure for immunity margins for susceptibility to conducted system-generated interferences. In order to have, when needed, a standardized procedure for disturbing voltages on hand, the responsible working committee decided to publish the procedure for the demonstration of the immunity margin against disturbing voltages contained in this document in the form of a supplement to VG 95370-14. The committee responsible for this document is NA 140-00-20-02 UA "Elektromagnetische Verträglichkeit (EMV); Messverfahren, Messgeräte und Grenzwerte" ("Electromagnetic compatibility (EMC); Test methods, test equipment and limits") at DIN.