Mat, Beware, some OV Testers in the market are not compliant with the UL1950 requirements. I also wanted to purchase an OV Tester a few years ago. The market price then was $14,000. I sent specs to UL and because the tester did not have two current sources as required in the standard, we had to reject the offer. We finally designed and built a tester for ourselves for a cost of $3000.
Regards At 09:14 11/05/2000 -0600, Aschenberg, Mat wrote: > >Hello, >I have a related question. It is indicated that one can get a CB Scheme >report to UL 1950. >UL 1950 paragraph 6.6 requires an overvoltage test. Who makes these >overvoltage testers? > >Mat >Mathew Aschenberg >Agency Engineer >EchoStar Technologies Corporation >90 Inverness Circle East >Englewood, CO 80112 > > >> -----Original Message----- >> From: Grant, Tania (Tania) [SMTP:tgr...@lucent.com] >> Sent: Wednesday, May 10, 2000 7:51 PM >> To: emc-p...@ieee.org; 'Jon Keeble' >> Subject: RE: UL certification and Underwriter Laboratory >> >> >> John, >> >> The 'UbackwardsR' mark' is but one of many UL marks. This is the UL >> Recognition Mark;-- there are also UL Listing Marks, UL Classification >> Marks, and perhaps others that I have forgotten. And you are correct >> that >> only UL can issue UL marks. However, UL can do this based on CB Scheme >> reports, provided you have also complied with the U.S. National Electrical >> Code requirements, which are spelled out as deviation in the UL1950 >> standard. You should be looking at the UL1950, 3rd edition, which is >> also >> harmonized with the Canadian Standards Association and its Electrical >> Code. >> (Kill 2 birds with one stone!) >> >> Generally speaking, the UL Listing Mark is for end-use product, such as >> coffee pots, computers, and finished things one can generally buy in the >> store that perform a function. UL Recognition Marks are for components >> and incomplete assemblies that are to be placed inside end-use products, >> where their recognition still has to be evaluated in this final >> application. >> For example, power supplies, such as UPS, electronic load boxes, or desk >> type boxes with power cords which are used for test equipment, would be UL >> Listed. However, power supplies (transformer/capacitor/choke/etc. >> circuitry mounted on a printed circuit card) that are sub-assemblies of >> assorted computer products, would be UL Recognized. That means that >> this >> power supply would be further tested in you end-use product to be sure >> that >> you are not overloading it, and that you are using it within its rated >> specifications. >> >> You might find the following web sites helpful. >> >> http://ulstandardsinfonet.ul.com/ >> <http://ulstandardsinfonet.ul.com/> >> >> http://www.ul.com/ <http://www.ul.com/> >> >> Tania Grant, tgr...@lucent.com <mailto:tgr...@lucent.com> >> Lucent Technologies, Intelligent Network Unit >> Messaging Solutions Group >> >> >> ---------- >> From: Jon Keeble [SMTP:j.kee...@fairlightesp.com.au] >> Sent: Wednesday, May 10, 2000 4:05 PM >> To: emc-p...@ieee.org >> Subject: UL certification and Underwriter Laboratory >> >> >> I work for an Australian company that has always assumed that 'having UL' >> means 'having the 'UbackwardsR' mark'. >> >> The facts as I understand them are >> (1) a UL1950 certificate is required >> (2) only an NRTL can issue this certificate >> (3) The CB scheme was created to allow people in countries like Australia >> to achieve accreditation in other countries (including the US) through >> their local test house >> (4) the mark of any test house qualified to issue a UL1950 certificate is >> all that is required >> >> In our case, there are people in neighboring countries that >> (1) participate in the CB scheme >> (2) recognize some Australian test houses (none of which can issue UL1950) >> (3) are qualified to issue 1950 >> >> Our marketing department is fearful that not having the 'UbackwardsR' mark >> will raise questions in >> the mind of prospective customers. >> >> I'd be very appreciative of some candid feedback. >> >> >> >> >> ----------------------------- >> Jon Keeble >> Fairlight >> Hardware Engineering Manager >> 02 8977 9931 >> j.kee...@fairlightesp.com.au >> _________________________________ >> >> The bounds of Time, Space or Mechanics should never stand >> in the way of a perfectly good idea....... >> >> ------------------------------------------- >> This message is from the IEEE EMC Society Product Safety >> Technical Committee emc-pstc discussion list. >> >> To cancel your subscription, send mail to: >> majord...@ieee.org >> with the single line: >> unsubscribe emc-pstc >> >> For help, send mail to the list administrators: >> Jim Bacher: jim_bac...@mail.monarch.com >> Michael Garretson: pstc_ad...@garretson.org >> >> For policy questions, send mail to: >> Richard Nute: ri...@ieee.org >> >> >> ------------------------------------------- >> This message is from the IEEE EMC Society Product Safety >> Technical Committee emc-pstc discussion list. >> >> To cancel your subscription, send mail to: >> majord...@ieee.org >> with the single line: >> unsubscribe emc-pstc >> >> For help, send mail to the list administrators: >> Jim Bacher: jim_bac...@mail.monarch.com >> Michael Garretson: pstc_ad...@garretson.org >> >> For policy questions, send mail to: >> Richard Nute: ri...@ieee.org >> > >------------------------------------------- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > majord...@ieee.org >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson: pstc_ad...@garretson.org > >For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > Peter Merguerian Managing Director Product Testing Division I.T.L. (Product Testing) Ltd. Hacharoshet 26, POB 211 Or Yehuda 60251, Israel Tel: 972-3-5339022 Fax: 972-3-5339019 e-mail: pmerguer...@itl.co.il website: http://www.itl.co.il ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
