Dave,
We always recommend Class B to our clients and it’s up to them to weigh the mitigation time, if any, to achieve that level of compliance. As Bill had mentioned, a substation can be located in a Class B environment in the form of a distribution substation which I was not aware of but, have seen on a daily basis. When I hear of a substation, I envision one of the fenced in high to medium voltage installations, which is where this client’s product is intended. The original intent of this email string was not necessarily the environment you would find a substation or even which class to choose for the product, it was more a question of wording and interpretation. My interest, regarding IEC 61850-3, is in the way the last sentence of Section 5.8 is worded, “The communications equipment shall meet the requirements of CISPR 22 classes A and B (EN 55022A and EN 55022B) or FCC rules part 15 for class A and B digital devices 1 ( USA ).” Most product specific standards that I’m familiar with will reference either EN 55022 or EN 55011 for the test method and either establish their own limits based off of Class A or B or will rely on the class justification built into EN 55022 or EN 55011. I was curious why the above wording was chosen instead of a simple reference to EN 55022 or FCC Part 15 method and limits. Thanks for the feedback so far. Best regards, Steve O'Steen Director, EMC Advanced Compliance Solutions, Inc. [email protected] <mailto:[email protected]> 770-831-8048 ext. 210 www.acstestlab.com <http://www.acstestlab.com> ATLANTA, GA - MELBOURNE, FL - BOCA RATON, FL ****************CONFIDENTIAL**************** This e-mail and any attachments may contain information which is confidential, proprietary, privileged or otherwise protected by law. The information is solely intended for the named addressee (or a person responsible for delivering it to the addressee). If you are not the intended recipient of this message, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete it from your computer. ________________________________ From: Dave Wilson [mailto:[email protected]] Sent: Tuesday, January 04, 2011 6:05 PM To: Steve O'Steen; [email protected] Cc: Steve O'Steen Subject: Re: Emission Requirements for IEC 61850-3 Hi Steve, If you can't meet Class B then it should be stated in the test report. Regards, Dave ________________________________ From: Steve O'Steen <[email protected]> To: "[email protected]" <[email protected]> Cc: [email protected] Sent: Tue, January 4, 2011 11:23:13 AM Subject: Emission Requirements for IEC 61850-3 Is anyone in the group familiar with IEC 61850-3, emission requirements? See excerpts below: NORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 61850-3 Première édition First edition 2002-01 Réseaux et systèmes de communication dans les postes . Partie 3: Prescriptions générales Communication networks and systems in substations . Part 3: General requirements 5.8 EMI radiation Communications equipment may also be the source of various kinds of electromagnetic disturbances in a wide frequency range, that may be conducted through power supply lines, control lines or directly radiated by the equipment. The communications equipment shall meet the requirements of CISPR 22 classes A and B (EN 55022A and EN 55022B) or FCC rules part 15 for class A and B digital devices 1 ( USA ). I’ve reviewed this standard as well as the remainder of the IEC 61850 series of standards and can’t find any additional guidance regarding which class to apply. I suspect Section 5.8 above is referencing EN55022 and FCC Part 15 for the test method in addition to the class criteria for both Class A and B and the respective limits. If this is the case and given the criteria for Class A and B per EN 55022, I would expect most devices that fall under the scope of IEC 61850-3 to require no more than Class A emission limits. Any input would be appreciated. Best regards, Steve O'Steen Director, EMC Advanced Compliance Solutions, Inc. [email protected] <mailto:[email protected]> 770-831-8048 ext. 210 www.acstestlab.com <http://www.acstestlab.com/> ATLANTA, GA - MELBOURNE , FL - BOCA RATON , FL ****************CONFIDENTIAL**************** This e-mail and any attachments may contain information which is confidential, proprietary, privileged or otherwise protected by law. The information is solely intended for the named addressee (or a person responsible for delivering it to the addressee). If you are not the intended recipient of this message, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete it from your computer. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. 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Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
