7Voltage Regulation

The regulation of voltages is an important function on a distribution feeder. As the loads on the feeders vary, there must be some means of regulating the voltage so that every customer’s voltage remains within an acceptable level. Common methods of regulating the voltage are the application of step-type voltage regulators, load tap changing (LTC) transformers, and shunt capacitors.

7.1 Standard Voltage Ratings

The American National Standards Institute (ANSI) standard ANSI C84.1-1995 for “Electric Power Systems and Equipment Voltage Ratings (60 Hertz)” provides the following definitions for system voltage terms [1]:

  • System voltage: The root mean square (rms) phasor voltage of a portion of an alternating-current electric ...

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