1、 IEEE Standard for the Surge Parameters of Isolating Transformers Used in Networking Devices and Equipment Amendment 1: Addition of Saturated Core Secondary Winding Parameters Sponsored by the Surge Protective Devices Committee IEEE 3 Park Avenue New York, NY 10016-5997 USA IEEE Power and Energy Soc
2、iety IEEE Std C62.69a-2017 (Amendment to IEEE Std C62.69-2016)IEEE Std C62.69a-2017 (Amendment to IEEE Std C62.69-2016) 1 IEEE Standard for the Surge Parameters of Isolating Transformers used in Networking Devices and Equipment Amendment 1: Addition of Saturated Core Secondary Winding Parameters Spo
3、nsor Surge Protective Devices Committee of the IEEE Power and Energy Society Approved 23 March 2017 IEEE-SA Standards Board 2 Abstract: Added in this amendment is a new sub-clause, 4.5 Saturated core secondary winding parameters, to IEEE C62.69-2016. Test methods, test circuits, measurement procedur
4、es, and result treatment to determine the secondary winding resistance and saturated core inductance are given. Keywords: core-saturation, IEEE C62.69 The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2017 by The Institute of Electrical
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34、s At the time this IEEE standard was completed, the Low Voltage Solid State Protective Components Working Group had the following membership: Michael Maytum, Chair Albert Martin, Vice Chair Tim Ardley Robert Ashton Frank Basciano Nisar Chaudhry Leonard Drewes Bob Fried Ernie Gallo Bogdan Klobassa Pe
35、ter Kobsa Wolfgang Oertel Thomas Tran William TravisThe following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. Robert Ashton Frank Basciano Demetrio Bucaneg, Jr. Randall Groves Raymond Hill Werner Hoelzl John
36、 John Yuri Khersonsky Jim Kulchisky Albert Martin Michael Maytum Michael Newman Nick S. A. Nikjoo Wolfgang Oertel Lorraine Padden Branimir Petosic K. James Phillips Thomas Phipps Iulian Profir Thomas Rozek Bartien Sayogo Roger Verdolin John Vergis Jian Yu When the IEEE-SA Standards Board approved th
37、is amendment on 23 March 2017, it had the following membership: Jean-Philippe Faure, Chair Gary Hoffman, Vice Chair John Kulick, Past Chair Konstantinos Karachalios, Secretary Chuck Adams Masayuki Ariyoshi Ted Burse Stephen Dukes Doug Edwards J. Travis Griffith Michael Janezic Thomas Koshy Joseph L.
38、 Koepfinger* Kevin Lu Daleep Mohla Damir Novosel Ronald C. Petersen Annette D. Reilly Robby Robson Dorothy Stanley Adrian Stephens Mehmet Ulema Phil Wennblom Howard Wolfman Yu Yuan *Member Emeritus 7 Copyright 2017 IEEE. All rights reserved. Introduction This introduction is not part of IEEE Std C62
39、.69a-2017, IEEE Standard for the Surge Parameters of Isolating Transformers used in Networking Devices and EquipmentAmendment 1. Ferrite cored broadband signal transformers tend to saturate when a differential surge occurs across the primary winding. Core saturation causes the loss of primary windin
40、g to secondary winding coupling, shortening the transformed surge duration in the secondary winding circuit. The main surge stress occurs after the transformer core saturates and the key secondary winding parameters controlling this surge stress level are the secondary winding resistance and saturat
41、ed core inductance. This amendment adds a new sub- clause, 4.5 Saturated core secondary winding parameters, to IEEE C62.69-2016, which defines techniques for the determination of the secondary winding resistance and saturated core inductance. 8 Copyright 2017 IEEE. All rights reserved. Contents 4. C
42、haracteristics . 9 4.5 Saturated core secondary winding parameters . 9 5. Ratings . 13 9 Copyright 2017 IEEE. All rights reserved. IEEE Standard for the Surge Parameters of Isolating Transformers used in Networking Devices and Equipment Amendment 1: Addition of Saturated Core Secondary Winding Param
43、eters NOTEThe editing instructions contained in this amendment define how to merge the material contained therein into the existing base standard and its amendments to form the comprehensive standard. The editing instructions are shown in bold italic. Four editing instructions are used: change, dele
44、te, insert, and replace. Change is used to make corrections in existing text or tables. The editing instruction specifies the location of the change and describes what is being changed by using strikethrough (to remove old material) and underscore (to add new material). Delete removes existing mater
45、ial. Insert adds new material without disturbing the existing material. Insertions may require renumbering. If so, renumbering instructions are given in the editing instruction. Replace is used to make changes in figures or equations by removing the existing figure or equation and replacing it with
46、a new one. Editing instructions, change markings, and this NOTE will not be carried over into future editions because the changes will be incorporated into the base standard. 4. Characteristics Insert new 4.5 immediately after 4.4 as follows: 4.5 Saturated core secondary winding parameters 4.5.1 General Under differential surge conditions, a saturating core signal transformer has a secondary winding surge let- through current that is typically triangular and can be described by three surge waveform parameters of front, peak, and decay as listed below:
