From: "Regan Arndt" <[email protected]> Subject: RE: UL1950 Overvoltage Tests
Be aware that for North America the unit should be wrapped in cheesecloth when conducting the tests. In order to comply, the cheesecloth must not charr nor burn. Details are spelled out in Annex NAC of CSA C22.2 No. 950 or UL 1950 3rd edition. > -----Original Message----- > From: [email protected] [SMTP:[email protected]] > Sent: Tuesday, January 05, 1999 2:19 PM > To: [email protected]; Sparacino,George > Subject: RE: UL1950 Overvoltage Tests > > 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
