Kurt, Tania is right on the money. There are other items covered in EN60950 that need to be addressed, such as lithium batteries, flammability hazard from abnormals, and bonding safety (what happens when you hook 115V up to the -48VDC input?) Also, do you supply the SELV supply? If not, you must provided standard documentation in the manual and on the equipment stating the equipment must be connected to an isolated SELV supply. If you draw more than 200Watts, you also need to include warnings about high energy hazards.
As the saying goes, pay now or pay later (the interest rate is very high!) He knows how to deal with EN60950 for -48V devices, as he has done a couple for me in the past. Send it up to Brad at the Vancouver CSA office. You get really good service out of CSA (when it's not hockey season ;-), they don't screw up the reports (repeatedly) the way UL does, and their factory inspection/inspectors do a fine job. Best of luck, Dave Spencer Oresis Communications -----Original Message----- From: Grant, Tania (Tania) [mailto:[email protected]] Sent: Friday, May 19, 2000 11:27 AM To: EMC-PSTC; 'Andrews, Kurt' Subject: RE: Safety testing for 48 VDC powered ITE Equipment Kurt, Be careful. The LVD might exempt your equipment; however, if your 48 Vdc ITE has TNV connections, then you need to meet, per the old Telco or the new RTTE Directive, the "essential requirements" of safety, which are presumed to be met by compliance to EN60950. Alternatively, you can provide other proof that you meet the "essential requirements." Believe me, it is easier to comply with EN60950 than provide this alternate proof! If your 48Vdc ITE equipment is NOT connected to TNV circuits then, by the book, you can consider it as falling outside the scope of the LVD. However, I believe that this is a foolish position to take;-- you should take a look at the European liability laws and then decide whether you want to hide under LVD dc limit exemption. The EN60950:1992, incorporating Amendments 1 through 5, states that it is applicable to mains-powered or battery-powered ITE, "...with a rated voltage not exceeding 600 V." Note that there is no mention of a minimum voltage, whether ac or dc. Thus, the ITE standard does not exempt you, however, the LVD does, assuming you want to take up this exemption. Tania Grant, [email protected] <mailto:[email protected]> Lucent Technologies, Intelligent Network Unit Messaging Solutions Group ---------- From: Andrews, Kurt [SMTP:[email protected]] Sent: Friday, May 19, 2000 10:04 AM To: EMC-PSTC Subject: Safety testing for 48 VDC powered ITE Equipment I'm looking for information as to what is required as far as safety testing for a piece of 48 VDC powered ITE Equipment. All outputs will be 12 VDC or less. This is a commercial unit and will not be sold to consumers. In Europe it would fall outside the scope of the LVD as it starts at 75V for DC powered equipment and this will be powered by 48 VDC. Does anyone know if there any other safety standards required in Europe for this type of equipment? It does appear that safety testing and listing is required by OSHA for use in a U.S. workplace. According to OSHA Standard 1910 Subpart S all "electric utilization equipment" is required to be "approved" which in most cases means Listing by a NRTL. In 1920.399 OSHA defines "electric utilization equipment" as equipment which uses electrical energy for mechanical, chemical, heating, lighting, or similar useful purpose. My interpretation of this is that any equipment which uses electricity, AC or DC, would need to be tested and Listed. Is my interpretation of the OSHA requirements correct? What about requirements for Canada? Any insights into these questions would be greatly appreciated. Thanks, Kurt Andrews Compliance Engineer Tracewell Systems, Inc. 567 Enterprise Dr. Westerville, OH 43081 Ph. 614-846-6175 Fax 614-846-7791 Email: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
