IEEE C62.92.1™-2016 - Errata
IEEE C62.92.1™-2016 - Errata
IEEE C62.92.1™-2016 - Errata
Errata to
IEEE Guide for the Application of
Neutral Grounding in Electrical Utility
Systems—Part I: Introduction
Sponsor
Surge Protective Devices Committee
of the
IEEE Power and Energy Society
Correction Sheet
Issued 30 November 2017
Copyright 2017 by The Institute of Electrical and Electronics Engineers. Inc. All rights reserved. Published 2017
Printed in the United States of America.
This correction sheet may be freely reproduced and distributed in order to maintain the utility and currency of the
underlying Standard. This correction sheet may not be sold, licensed or otherwise distributed for any commercial
purposes whatsoever. The content of this correction sheet may not be modified.
Page 11, change the definition of coefficient of grounding (COG) to read as follows:
coefficient of grounding (COG): The ratio, ELG/ELL (expressed as a percentage), of the highest root-mean-square
(rms) line-to-ground power-frequency voltage ELG on a sound phase, at a selected location, during a fault to ground
affecting one or more phases to the line-to-line power-frequency voltage ELL that would be obtained at the selected
location with the fault removed.
Page 15, the first paragraph under subclause 6.2 should read as follows:
Various classes of grounding are available to the system designer, each having a unique set of attributes. The
response characteristics of the various classes of grounding may be defined or classified in terms of the ratios of
symmetrical component parameters, such as the positive-sequence reactance X1, the negative-sequence reactance X2,
the zero-sequence reactance X0, the positive-sequence resistance R1, the negative-sequence resistance R2, and the
zero-sequence resistance R0 (see Clarke [B6], Wagner and Evans [B22], and Willheim and Waters [B23]).
Page 24, the text between equation (A.9) and equation (A.10) should read as follows:
Where
COGa, COGb, and COGc are the coefficients of grounding for each respective phase.
Z1, Z2, and Z0 are the positive, negative, and zero sequence impedances, respectively, (Ω)
3 3
a 0.5 j 1 120 ; a 2 0.5 j 1 240
2 2