Solar Photovoltaic Basics, A Study Guide for the NABCEP Entry Level Exam by Sean White4324

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Electricity basics
Figure 3.7 Electrical generation, transmission and distribution system
Source: Wikimedia Commons. Attribution: J JMesserly https://en.wikipedia.org/wiki/File:Electricity_grid_simple- _North_America.svg.
This file is licensed under the Creative Commons Attribution 3.0 Unported license.
Color Key:
Black: Generation
Gray: Transmission
Blue: Distribution
Transmission lines
765, 500, 345, 230 and 138 kV
Substation
Step Down
Transformer
Subtransmission
Customer
26kV and 69kV
Generating Station
Primary Customer
13kV and 4kV
Generating
Step Up
Transformer
Transmission Customer
138kV or 230kV
Secondary Customer
120kV and 240kV
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