Hello George, I agree that the unit in question passes the test according to UL1950. I raise the question if the test would be repeated "n" number of times, would acceptable results be obtained each time? As a matter of fact, in our case, we conducted the test twice on different samples and obtained the same results.
Thank you for your comments. > Hello Peter, > > The objective of these tests is to ensure that there will be no shorting > which would create an electrical shock hazard. This is not an > operational test.. the product isn't expected to operate after this > test.. The post dielectric test is used to verify if any shorting > conditions have occurred as a result of the OVT that would create a > shock hazard. To answer your question, Yes, your scenario below would be > an acceptable result. > > Best Regards, > George > > -----Original Message----- > > From: [email protected] [SMTP:[email protected]] > > Sent: Monday, January 04, 1999 4:37 PM > > To: [email protected] > > Cc: '[email protected]' > > Subject: UL1950 Overvoltage Tests > > > > > > Happy New Year to All, > > > > I would like to ask the opinion of all members regarding compliance > > criteria for the Overvoltage Tests in on TNV lines connected to > > exposed plant. UL1950 states that after the OV Tests, unit must > > comply with the Dielectric Voltage Withstand Tests or Leakage > > Current Tests. > > > > Assuming that after the OV Tests, some internal traces of the > > board opened and caused slight charring on the PCB and the unit > > passed all applicable Dielectric Voltage Withstand Tests, would > > this be cosnidered an acceptable result? > > > > Looking forward to hearing from all members on this sensitive issue. > > > > > > > > PETER S. MERGUERIAN > > MANAGING DIRECTOR > > PRODUCT TESTING DIVISION > > I.T.L. (PRODUCT TESTING) LTD. > > HACHAROSHET 26, P.O.B. 211 > > OR YEHUDA 60251, ISRAEL > > > > TEL: 972-3-5339022 > > FAX: 972-3-5339019 > > E-MAIL: [email protected] > > Visit our Website: http://www.itl.co.il > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to [email protected] > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to [email protected], > > [email protected], [email protected], or > > [email protected] (the list administrators). PETER S. MERGUERIAN MANAGING DIRECTOR PRODUCT TESTING DIVISION I.T.L. (PRODUCT TESTING) LTD. HACHAROSHET 26, P.O.B. 211 OR YEHUDA 60251, ISRAEL TEL: 972-3-5339022 FAX: 972-3-5339019 E-MAIL: [email protected] Visit our Website: http://www.itl.co.il
