Direct acting indicating analogue electrical measuring instruments and their accessories - Part 5: Special requirements for phase meters, power factor meters and synchroscopes
|Publication Date:||1 December 2017|
|ICS Code (Measurement of electrical and magnetic quantities):||17.220.20|
This part of IEC 60051 applies to direct acting indicating phase meters, power factor meters and synchroscopes having an analogue display.
This document also applies to non-interchangeable accessories (as defined in 3.1.23 of IEC 60051-1:2016) used with phase meters, power factor meters and synchroscopes.
This document also applies to a phase meter or power factor meter whose scale marks do not correspond directly to its electrical input quantity, provided that the relationship between them is known