IEC 61000-4-30-2015 pdf free download

IEC 61000-4-30-2015 pdf free download.Electromagnetic compatibility (EMC) – Part 4-30: Testing and measurement techniques – Power quality measurement methods. 4 General 4.1 Classes of measurement For each parameter measured, two classes, A and 5, are defined in this standard. For each class, measurement methods and appropriate performance requirements are included. — Class A This class is used where precise measurements are necessary, for example, for contractual applications that may require resolving disputes, verifying compliance with standards. etc. Any measurements of a parameter carried out with two different instruments complying with the requirements of Class A. when measuring the same signals, will produce matching results within the specified uncertainty for that parameter. NOTE 1 Class A measurements produce matching results Only if the user-selected parameters (thresholds. hysteresis, etc.) match. — Class S This class is used for statistical applications such as surveys or power quality assessment, possibly with a limited subset of parameters. Although it uses equivalent intervals of measurement as Class A, the Class S processing requirements are much lower. Some surveys may assess power quality parameters of several measurement sites on a network; other surveys assess power quality parameters at a single site over a period of time, or at locations within a building or even within a single large piece of equipment. — Class B For Class B information, see Annex E (informative) of this standard. Class B methods shall not be employed for new instruments. Class B is moved to Annex E on the basis that all new instrument designs will comply with either Class A or Class S. Class B may be relevant for legacy instruments that are still in use. Class B may be removed in the next edition of this standard. NOTE 2 Class B measurement methods will provide useful but not necessarily comparable information. Class B was introduced in IEC 610004-30:2003 (edition 1) specifically to avoid making older instrument designs obsolete. IEC 61000-4-30:2008 (edition 2) warned that Class B may be removed In a future edition of this standard, IEC 61000-4-30;— (this edition 3) warns again that Class B may be removed in a future edition, and moves Class B to Informative Annex E. NOTE 3 In this standard. A stands for Advanced, and S stands for “Surveys. Users shall select the class that they require, based on their application(s). For troubleshooting applications, depending on the type of problem either Class A or...