Pat Usually we run the surge tester inside our anechoic chamber and thus all supplies are filtered as they enter. What is interesting is that when the unit is repaired they run it for extended periods generating 6kV surges but then when we get it back it has been known to fail quite soon afterwards.
Ian Gordon From: [email protected] [mailto:[email protected]] Sent: 29 July 2009 17:13 To: Gordon,Ian Cc: [email protected]; [email protected] Subject: Re: Surge testing Hi Ian, I've had two surge generators made by another popular company fail recently. However, I always assume the decoupling network is . . . decoupling adequately, and never used an external EMI filter. Does your surge generator have separate inputs for basic generator operation and EUT voltage? If so, which input is the filter on? Pat Lawler EMC Engineer SL Power Electronics Corp. "Gordon,Ian" <[email protected]> wrote on 07/29/2009 07:16:04 AM: > We have been using a Schaffner NSG 2050 surge tester to perform both > mains and data line surges for a number of years. However the unit has > at times mysteriously become damaged such that it no longer delivers > surge current to the EUT even though you can hear the surge generator > charging up and apparently discharging. > It is suggested that the fault lies with the mains wiring at our > facility and that by running the tester on a filtered supply the mains > input to the generator may be subjected to over voltage. > > Has anyone else had similar problems with surge generators and do you > normally run them on filtered mains supplies? > > Ian Gordon --- --- --- --- --- --- --- --- --- --- --- --- --- The contents of this email and any attachments are confidential and are provided solely for the use of the intended recipient(s). If you are not the intended recipient, you are hereby notified that any copying, disclosure, distribution, or use of this e-mail, its attachments or any information contained therein is unauthorized and strictly prohibited and you should please contact the sender immediately and delete this e-mail and any attachments from your system. No responsibility is accepted for any virus or defect that might arise from opening this e-mail or attachments, whether or not it has been checked by anti-virus software. - 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]>
