I have a circuit I'm using to reduce the Overvoltage Category Level from 600V/CAT IV to 600V/CAT II before hitting an instrumentation transformer. I wish to test it per IEC 61010-2-030 Clause 14.101 (Circuits or components used as Transient Overvoltage limiting devices in measuring circuits used to measure Mains). The requirement is 5 positive and 5 negative impulses from a hybrid impulse generator at 8000V (1.2/50us O.C., 8/20us S.C., 2 ohms) while Mains is applied. Up to a minute is allowed between impulses. The pass criteria for the test is that no Hazard shall arise, and that the Mains breaker is not tripped.
My circuit is a combination of MOVs and GDTs with fast fusing on both input legs. On the first impulse the protection circuitry will blow the fuses. My first question is, do I replace fuses between impulses (I think not)? My second question is, what phase angle should I perform the test at (I think worst case, +90 for positive and +270 for negative)? Thanks, Robert A. Oglesbee Radian Research, Inc. (765) 449-5505 This message, and any attachments to it, may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are notified that any use, dissemination, distribution, copying, or communication of this message is strictly prohibited. If you have received this message in error, please notify the sender immediately by return e-mail or call 765-449-5500 and delete the message and any attachments. Thank you. - ---------------------------------------------------------------- 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) 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]>
