EN IEC 61000-4-18:2019

This part of IEC 61000 focuses on the immunity requirements and test methods for electricaland electronic equipment, under operational conditions, with regard to:a) repetitive slow damped oscillatory waves occurring mainly in power, control and signalcables installed in high voltage and medium voltage (HV/MV) substations;b) repetitive fast damped oscillatory waves occurring mainly in power, control and signalcables installed in gas insulated substations (GIS) and in some cases also air insulatedsubstations (AIS) or in any installation due to high-altitude electromagnetic pulse (HEMP)phenomena.The object of this document is to establish a common and reproducible reference forevaluating the immunity of electrical and electronic equipment when subjected to dampedoscillatory waves on supply, signal, control and earth ports. The test method documented inthis part of IEC 61000 describes a consistent method to assess the immunity of an equipmentor system against a defined phenomenon.NOTE As described in IEC Guide 107, this is a basic EMC publication for use by product committees of the IEC.As also stated in Guide 107, the IEC product committees are responsible for determining whether this immunitytest standard is applied or not, and if applied, they are responsible for determining the appropriate test levels andperformance criteria. 1The document defines:– test voltage and current waveforms;– ranges of test levels;– test equipment;– calibration and verification procedures of test equipment;– test setups;– test procedure.