Electrical Systems


Function

There are two (2) main function of electrical systems in a power plant:

Major Components

In nuclear plants there are several levels of electrical power distribution (other than from the generator to the generator transformer):

High voltage systems are used to supply equipment that have motors with high horsepower ratings. Examples of these are:

Medium voltage systems are used to supply equipment that have motors with moderate horsepower ratings. Examples of these are:

Low voltage systems are used to supply equipment that have motors with low horsepower ratings. Examples of these are:

Electrical Switchgear

This photo shows electrical switchgear (distribution panels) as may be found in a nuclear plant.

Detailed description. 

Diesel Generator

 

Photo shows a diesel generator used for emergency power generator as may be found in a nuclear plant.

Detailed description.

Cable Trays

A cable tray that holds electrical cables as may be found in a plant located in an area with high sensitivity to earthquakes. Note the structural supports.

Example System Diagram

Below is an example of an overall electrical distribution system for a nuclear plant:

Graphic courtesy USNRC


Copyright 1996-2005.  Joseph Gonyeau, P.E.. The Virtual Nuclear Tourist. All rights reserved. Revised: March 15, 2001.