Practical Guide to AC Motors and Control Options

Summary This report describes the advantages of using EDI for ultrapure water production for power plant boiler makeup water and microelectronics fabrication rinse water. Operating data is presented showing the advantages of EDI for these applications.

Introduction: This training is recommended for inspectors performing component design bases inspections (CDBIs) or other detailed inspections of electrical systems. Inspectors with demonstrated experience may be grandfathered in the completion of this training, if approved by the division director. Completion of technical proficiency-level training (Appendix C in IMC 1245) is strongly recommended before beginning this training. You may complete the requirements in this training standard along with the general proficiency requirements contained in Appendix B and the technical proficiency requirements in Appendix C. Objectives of Advanced-Level Training This training focuses on the activities necessary to fully develop individuals as lead or “experts” in the electrical inspection area. It is not the intent that all certified inspectors will complete all of the ISAs in this advanced appendix. In addition, this appendix should also be viewed as an inspector’s aid and could be used during an inspection to assist in inspecting a particular area.

Electrical temperature measurement The measurement of temperature is of special importance in numerous processes, with around 45% of all required measurement points associated with temperature. Applications include smelting, chemical reactions, food processing, energy measurement, and air conditioning. The applications mentioned are so very different, as are the service requirements imposed on the temperature sensors, their principle of operation, and their technical construction. In industrial processes, the measurement point is often a long way from the indication point; this may be demanded by the process conditions, with smelting and annealing furnaces, for example, or because central data acquisition is required. Often there is a requirement for further processing of the measurements in controllers or recorders. The direct-reading thermometers familiar to us all in our everyday life are unsuitable for these applications; devices are needed that convert temperature into another form, an electrical signal. Incidentally, these electrical transducers are still referred to as thermometers, although, strictly speaking, what is meant is the transducer, comprising the sensor element and its surrounding protection fitting. In industrial electrical temperature measurement, pyrometers, resistance thermometers, and thermocouples are in common use. There are other measurement systems, such as oscillating quartz sensors and fiber-optic systems that have not yet found a wide application in the industry