DANSK DSF/FPREN IEC 60068-3-3 PDF

This document applies primarily to electro-technical equipments but its application can be extended to other equipments and to components. Also if some sort of analysis is always performed when making a seismic qualification, e.g. for the choice of the representative sample to be tested or for the extension of the seismic qualification from the tested specimen to similar specimens, the verification of the performance of an equipment by analysis or by a combination of testing and analysis may be acceptable but is outside the scope of this guide, which is restricted to verification based entirely upon data from dynamic testing. This guide deals solely with the seismic testing of a full-size equipment which can be tested on a vibration table. The seismic testing of an equipment is intended to demonstrate its ability to perform its required function during and/or after the time it is subjected to the stresses and displacements resulting from an earthquake. The object of this guide is to present a range of methods of testing which, when prescribed by the relevant specification, can be applied to demonstrate the performance of equipments for which seismic testing is required with the main aim of achieving qualification. NOTE – Qualification by so-called “fragility-testing” is not considered to be within the scope of this guide which has been prepared to give generally applicable guidance on seismic testing and specifically on the use of IEC 60068-2 test methods. The choice of the method of testing can be made according to the criteria described in this guide. The methods themselves are closely based on published IEC test methods. This guide is intended for use by manufacturers to substantiate, or by users to evaluate and verify, the performance of an equipment.