IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

Timothy L. O'Hearn, PE

Course Outline

This 9-hour course will cover the application of indoor and outdoor high-voltage circuit breakers rated in accordance with the methods given in IEEE Std C37.04-1999, listed in IEEE Std C37.06-1997, and tested in accordance IEEE Std C37.09-1999.  Circuit breakers rated and manufactured to meet other standards should be applied in accordance with application procedures adapted to their specific ratings or applications.

This guide covers the application of indoor and outdoor high-voltage circuit breakers rated above 1,000 V for use in commercial, industrial, and utility installations.  It deals with usage under varied service conditions, temperature conditions affecting continuous current compensation, reduced dielectrics, reclosing derating as applicable, calculation of system short-circuit current, compensation at different X/R ratios, detailed calculations with application curves, out-of-phase switching, and general application.  The course materials are based entirely on IEEE C37.010-1999 (R2005) Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis.  It will be necessary for the student to obtain a copy of IEEE C37.010-1999 (R2005).

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

Learning Objective

At the conclusion of this course, the student will be familiar with:

• Definitions of the terms that are used in this application guide;
• General service conditions for AC high-voltage circuit breakers;
• Classification types for indoor and outdoor circuit breakers;
• The new voltage range factor;
• Continuous current rating limits for applications;
• Short-time load current capability above allowable continuous load current;
• Determination of allowable time for short-time load current;
• Emergency load current capability;
• Conditions for emergency load current carrying capability;
• Inspection and maintenance after an emergency cycle of operation;
• Rated dielectric withstand;
• Standard operating duty;
• Permissible tripping delay;
• Reclosing interrupting capability derating;
• Symmetrical interrupting capability
• Asymmetrical requirements;
• Rated line-closing switching surge factor
• Out-of-phase switching current rating;
• Short-circuit considerations;
• Short-circuit tests
• Methods for calculating system short-circuit currents;
• Rotating machine reactances;
• Resistance of system and typical X/R ratio;
• Application methods;
• Effects of ac component decrement;
• Longer contact parting time; and
• Special application circuit breakers for ac motor starting.
  

Intended Audience

The intended audience is professional electrical engineers, project managers, and project engineers, involved in the application of indoor and outdoor high-voltage circuit breakers rated above 1,000 V for use in commercial, industrial, and utility installations.  

Benefit to Attendees

This guide will assist individuals, organizations, and suppliers with the application of indoor and outdoor high-voltage circuit breakers rated above 1,000 V for use in commercial, industrial, and utility installations.  This is a very useful resource and is recommended that all practicing electrical or project engineers involved in the application of indoor and outdoor high-voltage circuit breakers rated in accordance with the methods given in IEEE Std C37.04-1999, listed in IEEE Std C37.06-1997, and tested in accordance IEEE Std C37.09-1999 should be familiar with and up to date with the application procedures in this guide.

Course Introduction

This 9-hour course covers the application of indoor and outdoor high-voltage circuit breakers rated above 1,000 V for use in commercial, industrial, and utility installations.  It deals with usage under varied service conditions, temperature conditions affecting continuous current compensation, reduced dielectrics, reclosing derating as applicable, calculation of system short-circuit current, compensation at different X/R ratios, detailed calculations with application curves, out-of-phase switching, and general application.  The course materials are based entirely on IEEE C37.010-1999 (R2005) Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis.  It will be necessary for the student to obtain a copy of IEEE C37.010-1999 (R2005).

This is a very useful resource and is recommended that all practicing electrical or project engineers involved in the specification, design, installation, and maintenance of high-voltage circuit breakers rated in accordance with the methods given in IEEE Std C37.04-1999, listed in IEEE Std C37.06-1997, and tested in accordance with IEEE Std C37.09-1999 be familiar with and up to date with the application procedures in this guide.

Course Content

This guide covers the application of indoor and outdoor high-voltage circuit breakers rated above 1,000 V for use in commercial, industrial, and utility installations.  It deals with usage under varied service conditions, temperature conditions affecting continuous current compensation, reduced dielectrics, reclosing derating as applicable, calculation of system short-circuit current, compensation at different X/R ratios, detailed calculations with application curves, out-of-phase switching, and general application.

The course materials are based entirely on IEEE C37.010-1999 (R2005) Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis.  It will be necessary for the student to obtain a copy of IEEE C37.010-1999 (R2005).

IEEE C37.010-1999 (R2005) Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis can be purchased from the following websites:
http://www.ieee.com/
http://www.global.ihs.com/

IEEE C37.010-1999 (R2005) IEEE Standard for Metal-Clad Switchgear
Table of Contents
Chapter 1 - Scope
Chapter 2 – References
Chapter 3 – Definitions
Chapter 4 – General Service conditions
Chapter 5 – Application considerations
Chapter 6 – Short-circuit considerations

Annex A Basis for E/X method corrected for ac and dc decrements in the calculation of short-circuit currents
Annex B Special application circuit breakers for ac motor starting

You need to obtain a copy of IEEE C37.010-1999 (R2005) Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis.

Course Summary

This 9-hour course covers the application of indoor and outdoor high-voltage circuit breakers rated above 1,000 V for use in commercial, industrial, and utility installations.  It deals with usage under varied service conditions, temperature conditions affecting continuous current compensation, reduced dielectrics, reclosing derating as applicable, calculation of system short-circuit current, compensation at different X/R ratios, detailed calculations with application curves, out-of-phase switching, and general application. 

Related Links

For additional technical information related to this subject, please visit the following websites or web pages:

http://www.ansi.com/
http://www.ieee.com/
http://www.nfpa.com
http://www.nema.com

Quiz

Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.

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DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDH Center or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered architect and/or professional engineer/surveyor. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.

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