An idealized representation of the four kinds of reserve power and the time intervals after an unexpected failure that they are in use. This image was created by Cedars using en:OmniGraffle. A PDF version of this image is available here. The diagram itself is based on Figure 2 from a March 2003 report by the Oak Ridge National Laboratory on Spinning Reserve From Responsive Loads archive copy at the Wayback Machine.

I think the graph is wrong and different with the text. Non-spinning is the same meaing of Replacement reserve. Am I wrong ?

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

This graph image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}. It is recommended to name the SVG file “Reservepower.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.