I bought IEC 60974-10 (2007-08) and have read through it. It is fine as it goes, but it doesn't really address what the electromagnetic environment is like DURING welding. The standard treats welders as just another power source and terminates the welder into a "conventional load", which I take to mean a resistive load. This is good so far as it goes. The manufacturer of the welder has little control over how the welder is used in the field. But the customer's concern is about the electromagnetic environment near the welder while in use in the field.
So my last (and now most important) question is: Is there any literature describing the electromagnetic environment around TIG and MIG welders while in operation in the field? I previously wrote: >We recently had a question from a customer as to whether our products are immune to the EMI generated by MIG and TIG welders. >Our base business is electrical protective relays, so we test everything (including products that are not protective relays) to the >protective relay standards (e.g., IEEE C37.90.2 radiated immunity, 20 V/m with 80% AM, giving a peak field of 36 V/m). So I >consider our products to be fairly robust already. >Question: Are there test standards for products that might be used near TIG or MIG welders? Failing that, are there test standards >for TIG and MIG welders? Failing both, is there any literature describing the electromagnetic environment around these welders? >I did a bit of reading, and found out that some TIG welders use a high frequency, high power burst (almost like a Tesla coil) to start >the arc. Sounds pretty nasty to me. Donald Borowski Schweitzer Engineering Labs Pullman, Washington, USA From: John Woodgate <[email protected]> To: [email protected] List-Post: [email protected] Date: 10/22/2010 09:02 AM Subject: Re: Test Standards for immunity to EMI from TIG and MIG welders? Sent by: [email protected] In message <of71fb0281.9dcde4a8-on882577c4.00539007-882577c4.00550...@selinc.com>, dated Fri, 22 Oct 2010, [email protected] writes: >I did a bit of reading, and found out that some TIG welders use a high >frequency, high power burst (almost like a Tesla coil) to start the >arc. Sounds pretty nasty to me. Very like a Tesla coil in fact! IEC 60974-10 (2007-08) Ed. 2.0 Bilingual English and French Arc welding equipment - Part 10: Electromagnetic compatibility (EMC) requirements -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK If at first you don't succeed, delegate. But I support unbloated email http://www.asciiribbon.org/ - ---------------------------------------------------------------- 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://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
