Electrica signature analysis (ESA) uses the magnetic field in the air gap of an electrical machine to evaluate power quality conditions. Dry and oil transofrmer types are subject to problems ...

Modern electrical systems, such as heating and ventilation controls, boiler controls, manufacturing and process control equipment, and railway signaling systems, usually have multiple inputs and ...

All questions and answers are based on the 2011 NEC. Q. What types of equipment grounding conductors does the NEC allow? A. An equipment grounding conductor can be any one or a combination of the ...

June 21, 2006 An intermittent fault is the most frustrating problem of all. Most of us who play with Gizmos have experienced it at least once, and some of us in specialist jobs have experienced it ...