MADCAD.com - The Cloud-Based Reference Library

- Free Trial - Webinar - Feedback

Cart (0)

No items in cart.

Total

There is a technical issue about last added item. You can click "Report to us" button to let us know and we resolve the issue and return back to you or you can continue without last item via click to continue button.

Home

Content

Tour

eLibrary

Store

Contact us for a custom quote

Please fill the form below and a member of our staff will contact you shortly. The contents of your cart will automatically be sent to us so we can provide an accurate custom quote.

Company*
Full name*
Email*
Phone

⨯To continue with accurate pricing,
please select your company type below:

Large goverment organizations

Large multi-national corporation (more than $5B annual revenue)

None of the above

Your company has a special pricing case for IEEE.
For pricing, please contact us by filling out the form.

Full name*
Email*
Phone
Your selection

⨯We need your input!

Are you a code official in a jurisdiction with less than 300,000 population?

Yes No

This item is only available for the code officials of jurisdictions less then 300K population.

If you do not meet the criteria item will be removed and you will be able to continue shopping other items.

⨯ We need your input!

Your company has a special pricing case for ASME.
Please make sure the information you provide below is accurate.

Company Industry
Number Of Employees
Revenue

Pricing for the ASME publications in the store is for a 1-4 employee company in Construction Industry with revenue under $500,000.
If correct company info does not match what is publicly available info we will suspend the access and contact you for correction.
Please call 1-800-798-9296 if you have any questions.
If your company has more than 5,000 employee or more than 500 mil revenue please email us at info@madcad.com to receive a special quote, use "ASME Quote" on the subject line.

Search book title

Search book content

Clear all filters Advanced Search Basic Search

Download File

eLibrary > Recommended Practice for Calculating AC Short-Circuit Currents in Industrial and Commercial Power Systems >

Recommended Practice for Calculating AC Short-Circuit Currents in Industrial and Commercial Power Systems, 2006

This document is reproduced and distributed under license from The Institute of Electrical and Electronics Engineers, Incorporated (IEEE), 445 Hoes Lane, Piscataway, New Jersey 08854 and is protected by United States and international copyright laws and treaties. No part of this publication may be reproduced, in any form and in any medium, without the prior written consent of the IEEE. If you have any questions, please contact MADCAD.com at support@madcad.com or call at 1.800.798.9296.

Expand All

TOC Search:

Recommended Practice for Calculating AC Short-Circuit Currents in Industrial and Commercial Power Systems, 2006

IEEE Recommended Practice for Calculating Short-Circuit Currents in Industrial and Commercial Power Systems
Title page
Introduction
Notice to users
Participants
CONTENTS
Chapter 1 Introduction [Go to Page]
1.1 Scope
1.2 Definitions
1.3 Acronyms and abbreviations
1.4 Bibliography
1.5 Manufacturers’ data sources
Chapter 2 Description of a short-circuit current [Go to Page]
2.1 Introduction
2.2 Available short-circuit current
2.3 Symmetrical and asymmetrical currents
2.4 Short-circuit calculations
2.5 Total short-circuit current
2.6 Why short-circuit currents are asymmetrical
2.7 DC component of short-circuit currents
2.8 Significance of current asymmetry
2.9 The application of current asymmetry information
2.10 Maximum peak current
2.11 Types of faults
2.12 Arc resistance
2.13 Bibliography
Chapter 3 Calculating techniques [Go to Page]
3.1 Introduction
3.2 Fundamental principles
3.3 Short-circuit calculation procedure
3.4 One-line diagram [Go to Page]
3.4.1 Single-phase equivalent circuit
3.4.2 Bus numbers
3.4.3 Impedance diagrams
3.4.4 Short-circuit flow diagrams
3.4.5 Relaying one-line diagrams
3.5 Per-unit and ohmic manipulations
3.6 Network theorems and calculation techniques [Go to Page]
3.6.1 Linearity
3.6.2 Superposition
3.6.3 Thevenin equivalent circuit
3.6.4 Norton equivalent circuit
3.6.5 Millman's theorem
3.6.6 Reciprocity
3.6.7 The sinusoidal forcing function
3.6.8 Phasor representation
3.6.9 Fourier representation
3.6.10 Equivalence
3.6.11 Parallel impedances
3.6.12 Analysis of unbalanced faults using symmetrical components
3.6.13 Sequence impedances
3.7 Extending a three-phase short-circuit calculation procedures program to calculate short-circuit currents for single-phase branches
3.8 Representing transformers with non-base voltages
3.9 Specific time period and variations on fault calculations
3.10 Determination of X/R ratios for ANSI fault calculations
3.11 Three-winding transformers
3.12 Duplex reactor
3.13 Significant cable lengths
3.14 Equivalent circuits
3.15 Zero sequence line representation
3.16 Equipment data required for short-circuit calculations [Go to Page]
3.16.1 Utility sources
3.16.2 Generators
3.16.3 Synchronous motors
3.16.4 Induction motors
3.16.5 Transformers
3.16.6 Reactors
3.16.7 Capacitors
3.16.8 Static regenerative drives
3.16.9 Breakers, contactors, and current transformers
3.16.10 Cables
3.16.11 Transmission lines
3.17 Bibliography
Chapter 4 Calculating short-circuit currents for systems without ac delay [Go to Page]
4.1 Introduction
4.2 Purpose
4.3 ANSI guidelines
4.4 Fault calculations
4.5 Sample calculations [Go to Page]
4.5.1 Sample calculation #1
4.5.2 Sample calculation #2
4.5.3 Sample calculation #3
4.6 Sample computer printout [Go to Page]
4.6.1 Raw data printout
4.6.2 Per-unit data
4.6.3 Computer short-circuit printout
4.7 Conclusions
4.8 Bibliography
Chapter 5 Calculating ac short-circuit currents for systems with contributions from synchronous machines [Go to Page]
5.1 Introduction
5.2 Purpose
5.3 ANSI guidelines
5.4 Fault calculations
5.5 Nature of synchronous machine contributions
5.6 Synchronous machine reactances
5.7 One-line diagram data
5.8 Sample calculations [Go to Page]
5.8.1 Sample calculation #1
5.9 Sample computer printout
5.10 Sample computer printout for larger system calculations
5.11 Conclusions
5.12 Bibliography
Chapter 6 Calculating ac short-circuit currents for systems with contributions from induction motors [Go to Page]
6.1 Introduction
6.2 Purpose
6.3 ANSI guidelines
6.4 Fault calculations
6.5 Nature of induction motor contributions
6.6 Large induction motors with prolonged contributions
6.7 Data accuracy
6.8 Details of induction motor contribution calculations according to ANSI-approved standard application guides
6.9 Recommended practice based on ANSI-approved standards for representing induction motors in multivoltage system studies
6.10 One-line diagram data
6.11 Sample calculations [Go to Page]
6.11.1 Sample calculation #1
6.12 Sample computer printout
6.13 Bibliography
Chapter 7 Capacitor contributions to short-circuit currents [Go to Page]
7.1 Introduction
7.2 Capacitor discharge current [Go to Page]
7.2.1 Example
7.3 Transient simulations [Go to Page]
7.3.1 Standard capacitor bank
7.3.2 Harmonic filter bank
7.3.3 Medium-voltage motor capacitors
7.3.4 Low-voltage motor capacitors
7.4 Summary
7.5 Bibliography
Chapter 8 Static converter contributions to short-circuit currents [Go to Page]
8.1 Introduction
8.2 Definitions of converter types
8.3 Converter circuits and their equivalent parameters
8.4 Short-circuit current contribution from the dc system to an ac short circuit
8.5 Analysis of converter dc faults
8.6 Short circuit between the converter dc terminals
8.7 Arc-back short circuits
8.8 Examples
8.9 Conclusions
8.10 Bibliography
Chapter 9 Calculating ac short-circuit currents in accordance with ANSI-approved standards [Go to Page]
9.1 Introduction
9.2 Basic assumptions and system modeling
9.3 ANSI recommended practice for ac decrement modeling [Go to Page]
9.3.1 General definitions and duty types
9.3.2 Induction motor ac decrement modeling
9.3.3 Synchronous generator ac decrement modeling
9.4 ANSI practice for dc decrement modeling [Go to Page]
9.4.1 DC decrement curves for totally rated circuit breakers
9.4.2 DC decrement applied to symmetrically rated breakers
9.5 ANSI-conformable fault calculations [Go to Page]
9.5.1 First cycle calculations
9.5.2 Interrupting calculations
9.5.3 Time delayed calculations
9.6 ANSI-approved standards and interrupting duties [Go to Page]
9.6.1 General considerations
9.6.2 Interrupting device evaluation aspects
9.6.3 First cycle currents
9.7 One-line diagram layout and data
9.8 First cycle duty sample calculations [Go to Page]
9.8.1 First cycle duty calculations at bus 4:MILL-2
9.8.2 First cycle duty calculations at bus 8:FDR L
9.8.3 First cycle duty calculations at bus 37:T14 SEC
9.9 Interrupting duty sample calculations [Go to Page]
9.9.1 Interrupting duty calculations for bus 4:MILL-2
9.9.2 Interrupting duty calculations for bus 8:FDR L
9.10 Applying ANSI calculations to non-60 Hz systems [Go to Page]
9.10.1 Asymmetry factor equations
9.10.2 Breaker contact-parting times and X/R ratio
9.11 Normative references
9.12 Bibliography
Chapter 10 Application of short-circuit interrupting equipment [Go to Page]
10.1 Introduction
10.2 Purpose
10.3 Application considerations
10.4 Equipment data
10.5 Fully-rated systems
10.6 Low-voltage series rated equipment
10.7 Low-voltage circuit breaker short-circuit capabilities less than rating
10.8 Equipment checklist for short-circuit currents evaluation
10.9 Equipment phase duty calculations [Go to Page]
10.9.1 13.8 kV Breakers
10.9.2 13.8 kV bus disconnect switch
10.9.3 13.8 kV transformer primary fuse
10.9.4 480 V load center
10.9.5 480 V motor control center
10.9.6 480 V lighting panelboard
10.9.7 Cables
10.10 Equipment ground fault duty calculations
10.11 Capacitor switching
10.12 Normative references
Chapter 11 Unbalanced short-circuit currents [Go to Page]
11.1 Introduction
11.2 Purpose
11.3 ANSI guidelines
11.4 Procedure
11.5 Connection of sequence networks
11.6 Sample calculations [Go to Page]
11.6.1 Line-to-ground fault calculation
11.6.2 Line-to-line fault calculation
11.7 Conclusions
11.8 Normative references
11.9 Bibliography
Chapter 12 Short-circuit calculations under international standards [Go to Page]
12.1 Introduction
12.2 System modeling and methodologies
12.3 Voltage factors
12.4 Short-circuit currents per IEC 60909
12.5 Short circuits “far from generator” [Go to Page]
12.5.1 Definitions and generalities
12.5.2 Calculation of maximum fault currents
12.5.3 Network feeders
12.5.4 Initial short-circuit current calculations
12.5.5 Symmetrical breaking current
12.5.6 Steady-state fault current
12.5.7 Peak fault current
12.5.8 Non-meshed current paths
12.5.9 Meshed current paths [Go to Page]
12.5.9.1 Dominant X/R ratio technique
12.5.9.2 Short-circuit location X/R technique
12.5.9.3 Equivalent frequency technique
12.5.10 Calculation of minimum fault currents
12.6 Short circuits “near generator” [Go to Page]
12.6.1 Definition and generalities
12.6.2 Impedance correction factors
12.6.3 Generator impedance correction factor
12.6.4 Power station unit correction factors
12.6.5 Calculation of generator maximum Initial fault currents
12.6.6 Calculation of generator peak short-circuit currents
12.6.7 Calculation of generator symmetrical breaking currents
12.6.8 Steady-state fault currents calculation
12.6.9 Maximum steady-state fault current, Ikmax
12.6.10 Maximum steady-state fault current, Ikmin
12.6.11 Coefficients lmax, lmin
12.7 Influence of motors [Go to Page]
12.7.1 General considerations
12.7.2 Synchronous motors
12.7.3 Induction motors
12.7.4 Static drives
12.8 Fault calculations in complex systems
12.9 Comparing the ANSI-approved standards with IEC 909
12.10 Sample calculations [Go to Page]
12.10.1 Rotating equipment impedances [Go to Page]
12.10.1.1 Network feeders
12.10.1.2 Synchronous motors
12.10.1.3 Induction motors
12.10.2 Calculation of maximum initial fault currents [Go to Page]
12.10.2.1 Fault at bus 4:MILL-2
12.10.2.2 Fault at bus 8:FDRL
12.10.2.3 Fault at bus 37:T14SEC
12.10.3 Calculation of peak fault currents
12.10.4 Calculation of breaking currents [Go to Page]
12.10.4.1 Fault at bus 8:FDRL
12.10.4.2 Fault at bus 37:T14SEC
12.10.5 Calculation of steady-state generator fault currents
12.11 Normative references
12.12 Bibliography [Go to Page]

Email *
Password *
Confirm *
First Name *
Last Name *
Title
Company Name *
Company Size *
Industry *
Address *
Address 2
City *
State *	Zip *
Country *
Phone *
How did you hear about MADCAD.com? *