The basic design of a plant electrical system.
The tuned circuit is a fundamental building block among electrical and analog electronic circuits. Understanding how it functions provides insight to power quality, communications, controls, electronic equipment, and many other systems found in industrial manufacturing plants. This article provides a brief tutorial on tuned circuit theory and operation.
Electricity cannot be seen physically; only its effects can be seen or felt. At times, some aspects of electricity can be difficult to understand. One such phenomenon is the presence of different types of power in ac electrical systems. This article presents a physical analogy of electrical power as a refresher to help you understand these concepts further.
The August 14, 2003 blackout emphasized that power quality should not be taken lightly. The blackout was caused by, and affected the power grid — our nation's electrical infrastructure. The issues raised by this event should and will come under scrutiny. Just as the nation looks at its power quality issues, plant engineers must look at power quality issues inside the plant.
A circuit breaker is designed to keep an undesirably large amount of current, voltage, or power out of a given part of an electrical circuit. Industrial circuit breaker categories tend to follow voltage classes, which are divided according to magnitude. The IEEE divides voltage systems into four classes listed in the table titled "IEEE voltage classifications.