Don't hesitate. Share your thoughts and experiences. Tell us what you like and what we can do better.

Dear Sirs,
"LEARN TO SWIM "article is very apt for IEC 61850 which is a major step forward in protection and control engineering. Being in this field for five decades and comparing the technological changes from electromechanical, static, digital/numerical to IEC 61850 it is a major step forward as external hardwire logic is shifted to software logic built in to IEDs.
When numerical relays were introduced with multifunction with limited logics with IOs it took some time for circuit engineers, who prepare scheme drawings, to appreciate and fully implement.
Now with major protection logic in the software form will eliminate voluminous drawings and wiring. It is like you swim in shallow water during electromechanical and static days, in a swimming pool during numerical days and now with IEC 61850 you should be prepared to swim in a sea or ocean depending on your system level.

K.R. Balakrishnan, India

PAC World:  Dear Mr. Balakrishnan,
We really appreciate your comments to the thoughts in "Learn to Swim". You are right that IEC 61850 is an ocean of opportunities. For those who know how to swim, and even better, know also how to take advantage of the engineering tools, it is a chance to reach places only dreamed of before.


In your magazine (issue March, 2011) I have just found out Walter Schossig's article "Protection History. Frequency Protection" in which he used text and figures from Chapter 14 "Frequency Relays" of my book: "Electric Relays: Principles and Applications", 2006, CRC Press, USA.
I hope you know that such use of materials without references to the original publication and author named is "plagiarism".
Can you explain the publication of such material in your magazine?

Dr. Vladimir Gurevich,
Honorable Professor of Kharkov Technical University,
Head of section of Central Electric Laboratory, Israel Electric Corp., Israel

PAC World:  Dear Dr. Gurevich,
During his research for the history article, the author Walter Schossig found that your publications cover in an excellent way the history of protection, automation and control in Russia and the Soviet Union. You are correct, that in his article he has used information regarding frequency protection and other topics that he found in your book "Electrical Relays: Principles and Applications".
The reason that your book, as well as any other sources, is not listed as a reference in the magazine is due to the policy not to include references at the end of articles because of the limited space and our desire to deliver as much information as possible in the available pages. We are sorry that your book was not mentioned as a source, and hope you will understand the reasons. At the same time, we would like to invite you, as well as anybody else with interests in the history of our industry to become a contributor to these articles.

Starting September 2011, we will include a list of sources for the magazine articles, by publishing them in their original version on the PAC World web site.


pac world

Editor in chief: dr. Alexander Apostolov (USA)
Editors: Clare Duffy (Ireland), Christoph Brumer (Switzerland), Yana St. Clair (USA)
Design Layout Concept: Marek Knap (Poland)
Graphic Design: Terry McCoy (USA),
Iagoda Lazarova (USA), Dan-Andrei Serban (Romania)
Web Masters: Ognian Samokovliiski (Bulgaria)

Advisory Board: dr. Damir Novosel (USA), 
prof. Peter Crossley (UK),  prof. Paul Lee (Korea),
prof. Xinzhou Dong (China),  
prof. Mohindar Sachdev (Canada),
Jorge Miguel Ordacgi Filho (Brazil),
Rodney Hughes (Australia),
Graeme Topham (South Africa)



PAC World  (Email: editor@pacw.org)
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Houston, TX  77046, USA
PAC World magazine is published quarterly by PAC World.  All rights reserved.  All published articles express solely the opinion of the authors. Reproduction in whole or in part of any material in this publication is allowed.
Parent company: OMICRON electronics Corp. USA

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