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Home / Download Center / Electrical Engineering Books and Technical Guides / Electrical engineering guides / Coordinated Power Systems Protection – Design, Coordination and Construction

Protection techniques

This manual establishes the criteria for design, coordination, and construction of power systems for military projects. A secondary purpose is to acquaint designers with the general applications, philosophies, and purposes for the selection, calibration, setting, and testing of protective devices.

Coordinated power systems protection guide
Coordinated power systems protection guide (photo credit:

This manual describes protection techniques for electrical power supply and distribution systems. Guidance is included for coordination techniques and selection of protective devices.

Electrical power systems

Electric power systems consist of 4 major categories:

  1. Generating stations,
  2. Transmission lines,
  3. Distribution lines, and
  4. Utilization systems.

The electric power system industry converts and transports energy for utilization by numerous industrial, commercial, and residential customers. One of the largest users of electric energy in the United States is the U.S. Government.


The majority of electrical power produced in the United States is generated by steam-turbine plants. Hydro-electric generation accounts for only a small percentage because most available water sources have already been placed into service.

Gas-turbines are used primarily for peaking during short periods of high demand. Fuel for steam-turbine plants is, for the most part, coal or nuclear.

Transmission lines

The voltage rating of large generators employed at primary generating stations ranges from 13.8kV to 24kV. Generator voltage is stepped up to transmission voltage level using transformers. Transmission voltage levels in the United States range from 115kV to 765kV.

Electrical power systems must be designed to serve a variety of loads safely and reliably. Effective control of short circuit current, or fault current as it is commonly called, is a major consideration when designing coordinated power system protection.

Title:Coordinated Power Systems Protection
Size:1.6 MB
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Coordinated Power Systems Protection
Coordinated Power Systems Protection

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  1. Alfred Audi
    Apr 02, 2019

    Want to go premium
    Need full advantage what’s offer software etc

  2. yeshu_here
    Mar 12, 2013

    I have tried clicking on ‘Right here’ for download but it is not downloading. It goes to the next page which says ‘This user has not sharing enabled’.
    Please help. Thanks in advance.

  3. senthemekmr
    Dec 29, 2012


  4. azrilhisham
    Jun 21, 2011

    no pdf file to be downloaded…where is the file?

    • Edvard
      Jun 21, 2011

      I just tried and file (008_Power_system_protection_coordination.rar) is available for download. Make sure you clicked on the right button (Download Now).


      • Shailesh Kumar
        May 07, 2012

        i tried may be website is down. even i am not able to download !

  5. luis ernesto pachon
    Apr 26, 2011

    estoy interesado en literatura acerca de la ingenieria electrica

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