High-voltage switchgear and controlgear - Part 215: Phase comparator used with VDIS

IEC 62271-215:2021 is applicable to <em>phase comparators</em> designed to be plugged into the <em>testing points</em> of a <em>voltage detecting and indicating system</em> (<em>VDIS</em>) according to IEC 62271-213, to give an indication of the result of a phase comparison. The main usage is to provide a clear evidence of the phase relationship between two energized parts of a high-voltage network, at the same <em>nominal voltage </em>and frequency before coupling them. This first edition cancels and replaces the first edition of IEC 61243-5 published in 1997 and the first edition of IEC 62271-206 published in 2011. This edition constitutes a merging of the content of IEC 61243-5 and IEC 62271-206. This edition includes the following significant technical changes with respect to the previous editions of IEC 61243-5 and IEC 62271-206: <ol style="list-style-type:lower-alpha"> <li>the document does not include the specific <em>phase comparators</em> (SPCs) as defined in IEC 61243-5, which was specific to manufacturers, and takes back the technical principles of the universal phase comparator (UPC) for <em>VDIS</em> of all manufacturers;</li> <li>the phase comparator for sequential connected operation is introduced to facilitate the operation of phase comparation of large MV panels.</li> </ol>