"In recent years, the rapid growth in the importance of electrical. power quality (PQ) has created a demand for highly effective monitoring. instruments, able to evaluate different PQ parameters. Instrument suppliers. propose for the PQ measuring systems a variety of sizes and configurations,. owing to the growing application fields. The metrological characterisation of. these instruments is a problem because they must satisfy different. requirements. In this paper, we discuss about the characterisation of PQ. analysers, starting from an overview of current main international standards. As. a case study in the paper a testing procedure is proposed, reporting also the. characterisation results obtained with a multifunction PQ analyser prototype."
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