The challenges and pitfalls one faces when upgrading an old process to DCS are examined. The result can be as insignificant as a nuisance trip, or a very expensive process shutdown. Guidelines which help mitigate contactor operation will be provided. PA A procedure is presented for identifying the source of harmonic currents in the power distribution system as measured at various feeders and loads. Examples are given to show why some harmonics exist while others do not.
Harmonic cancellation is explained along with a tool for understanding and predicting the results.
If you cannot fully program your VCR, you may be in trouble with your new low voltage breaker. This paper briefly reviews the last 50 years of its development and the complexity of today's features and their applications. This paper provides a basic understanding of these issues and how to deal with them. Restructuring the Electric Utility Industry William H. Fox, Jr., Duke Power Co., Charlotte, NC Retail competition means that some people like you and I will be able to choose our electricity supplier. This paper deliberates the requirements to successfully monitor and control a production environment.