ABSTRACT
This chapter discusses different instruments, both analog and digital, for the monitoring of power quality. With the deregulation of the electricity supply industry, increased attention is being focused on power supply reliability and power quality. Effective monitoring programs are important for power reliability assurance for both utilities and customers, because most customer power quality problems originate within the customer facility. Monitoring power quality ensures optimal power system performance and effective energy management. Before embarking on any power quality program one should clearly define the monitoring objectives, as they determine the choice of monitoring equipment. The majority of power quality problems reported by customers are caused by problems with wiring or grounding within the facility. Monitoring of power quality on power systems often requires transducers to obtain acceptable voltage and current signals. The chapter discusses the transducer current transformers and voltage transformers to reduce high voltage and current levels to levels suitable for instrumentation purposes.
