> 2. When the unit is in the field, it will have the surge protection installed, > which will essentially limit any "real life hipot" voltages to about 500V (230V > gas tube, 275VAC MOV). In real life, the unit would experience a maximum 500V > hipot. However, in the case of a single fault (surge protection disabled), the > unit could experience higher hipot voltages, which would cause damage, but not an > unsafe condition (as shown by type testing).
Correct me if I'm wrong, but the point of the type-level hipot test is not to simulate a real-life condition (like surge protection), but to simulate years of insulation degradation, which happens with or without surge protection. Thanks, Sam This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
