Re: LVD Production Line Tests
Kevin and Group, If I understand your comments correctly; if we declare to the LVD using a EN61010-1 certification instead of EN 60950, then the 25 Amp production test described in EN 50116 is not required. Of course, it is assumed that EN 61010-1 is the appropriate standard for the product category in question. Is there agreement, then that products NOT specifically certified to EN 60950 require that production line continuity ground tester is only an appropriate continuity device such as an ohmmeter , with buzzer or warning device with no specific mention of current or time? Please advise. Best Regards, Paul J Smith Teradyne, Inc., Boston paul.j.sm...@teradyne.com Voice 617-422-2997 FAX 603-843-7526 Kevin Harris harr...@dscltd.com on 09/03/99 11:37:58 AM Please respond to Kevin Harris harr...@dscltd.com To: EMC-PSTC (E-mail) emc-p...@ieee.org cc:(bcc: Paul J Smith/Bos/Teradyne) Subject: LVD Production Line Tests Hello Group. In last weeks thread about ground bonding no one commented on the side issue for Europe of production line testing to EN 50116 if the equipment was type tested to EN60950. I get the impression that many firms are not testing to EN50116. Does anybody use some other production line test method? Can one say one meets the LVD if one chooses another method for production line testing? Best Regards, Kevin Harris Manager, Approval Services Digital Security Controls 1645 Flint Road Downsview, Ontario CANADA M3J 2J6 Tel 416 665 8460 Ext. 2378 Fax 416 665 7753 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Intrinsic safety for factory communication?
Joe, There truly are standards for factory automation for the US and Europe (although I have to dig into my files to tell you the standards). For ITE, industrial control, robotic or any other equipment for use in hazardous locations, the equipment must either be intinsically safe or protected such as by purging or locating within explosion-proof enclosures. You can refer to the US National Electrical Code (NFPA 70) and the European regulations to get an idea of what is a hazardous location (Classes and Zones). Depending on the Classes and/or Zones, various protection schemes are allowed. To cut the story short, factory automation equipment does not necessarily have to be intrinsically safe and/or explosion-proof. This depends on the factory environment in which it is placed. Have a good day. Hello All: I am hoping that some of you can help me gain an understanding of the requirements for intrinsic safety for communication wiring that is used in a manufacturing environment. My background is in telecom and ITE, not factory automation. However, I have been asked to assist a client with developing some communication technology that will be used for sensors and controls on a factory floor. My client tells me that for communication wiring that is used in a factory, there are requirements for intrinsic safety of the wiring. Among other things, there is reportedly a test where connections are made and broken in an atmosphere that contains explosive gases. Since any sparks generated from the make/break of the connections could ignite the gases, it is reportedly necessary to design the communication scheme in such a way that no sparks are generated. When I asked where these requirements are documented, I was told that there is no written standard for intrinsic safety. Rather, the system must be submitted to an independent agency for review, and this agency will evaluate the system according to their own (internal) criteria. Now, coming from a background in ITE, I find this hard to believe. In the ITE world, we have documented standards for safety such as UL 1950 in the USA and EN 60950 in Europe. I find it hard to imagine that there are no comparable standards for factory automation. Can any of you clarify this issue for me? Where does the concept of intrinsic safety come from, and how is compliance determined? I am interested in addressing this issue for both North America and Europe. Any assistance you could provide would be greatly appreciated. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2840 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (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: pe...@itl.co.il 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 majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
LVD Production Line Tests
Hello Group. In last weeks thread about ground bonding no one commented on the side issue for Europe of production line testing to EN 50116 if the equipment was type tested to EN60950. I get the impression that many firms are not testing to EN50116. Does anybody use some other production line test method? Can one say one meets the LVD if one chooses another method for production line testing? Best Regards, Kevin Harris Manager, Approval Services Digital Security Controls 1645 Flint Road Downsview, Ontario CANADA M3J 2J6 Tel 416 665 8460 Ext. 2378 Fax 416 665 7753 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Intrinsic safety for factory communication?
In addition to the very good info already offered, you might consider purchasing an excellent text from the National Fire Protection Association at http://www.nfpa.org/ The text is Electrical Installations in Hazardous Locations and is intended for the beginner and the practitioner. I purchased my copy about 10 years ago, but I visited their catalog site and it appears that the current revision is 1998. This text was tremendous help to me way back when I started my haz loc learning curve. The book will describe the spark ignition test you refer to. My revision also touched upon international compliance and the EU Zone ratings. Your best contacts for information are likely to be Factory Mutual for North America (781-255-4822, Bill Lawrence) and BASEEFA for the EU (United Kingdom, Ron Sinclair, 44-1298-28-203). Carl Newton Xycom Automation From: j...@aol.com on 09/02/99 04:59 PM GMT Please respond to j...@aol.com To: emc-p...@majordomo.ieee.org cc:(bcc: Carl Newton/XYCOM) Subject: Intrinsic safety for factory communication? Hello All: I am hoping that some of you can help me gain an understanding of the requirements for intrinsic safety for communication wiring that is used in a manufacturing environment. My background is in telecom and ITE, not factory automation. However, I have been asked to assist a client with developing some communication technology that will be used for sensors and controls on a factory floor. My client tells me that for communication wiring that is used in a factory, there are requirements for intrinsic safety of the wiring. Among other things, there is reportedly a test where connections are made and broken in an atmosphere that contains explosive gases. Since any sparks generated from the make/break of the connections could ignite the gases, it is reportedly necessary to design the communication scheme in such a way that no sparks are generated. When I asked where these requirements are documented, I was told that there is no written standard for intrinsic safety. Rather, the system must be submitted to an independent agency for review, and this agency will evaluate the system according to their own (internal) criteria. Now, coming from a background in ITE, I find this hard to believe. In the ITE world, we have documented standards for safety such as UL 1950 in the USA and EN 60950 in Europe. I find it hard to imagine that there are no comparable standards for factory automation. Can any of you clarify this issue for me? Where does the concept of intrinsic safety come from, and how is compliance determined? I am interested in addressing this issue for both North America and Europe. Any assistance you could provide would be greatly appreciated. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2840 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: Doubt on household equipment interference
Hi list-mates! Three-phase power 230/400 VAC, 50 Hz is distributed to household customers in Germany. This is the case for me at home. The input residual current circuit-breaker (with integral overcurrent protection) is of the four pole type and is located at the input of my apartment panelboard. (This panelboard contains a kind of small neutral busbar. Final circuits are 230 VAC single-phase. They are derived from one of the three phase conductors and from the neutral busbar. The phase conductor of each of said single-phase final circuits is protected by a single pole overcurrent-operated miniature circuit-breaker, rated 16 A, ...). Back from work, today I will connect one blender to the same socket-outlet that supplies my TV. In this case the PCC (point of common coupling) is the socket-outlet itself. I will then supply the blender from some other final circuits. In this case the point of common coupling should be my apartment panelboard. ... a doubt ... Should I expect any interference at all on my TV? Both my blender and my TV are CE-marked ... Bis Montag! (i.e., I will report on next Monday) Canio Dichirico - Original Message - From: James, Chris c...@dolby.co.uk To: 'Muriel Bittencourt de Liz' mur...@grucad.ufsc.br; Lista de EMC da IEEE emc-p...@ieee.org Sent: Thursday, September 02, 1999 10:11 Subject: RE: Doubt on household equipment interference In the UK and I believe Europe I would not expect to see 3 phase brought into a household environment as this would expose the customer to line voltages (root 3 x phase voltage [line-to-neutral]). Even in office locations the power outlets are kept to a single phase per floor to prevent an inadvertent connection between two phases. Even if your scenario existed it would depend how the neutral was wired to each outlet; if it was a common neutral ring then the chance of problems would be greater than if each phase was fed with its own neutral return from a star point. Chris James -Original Message- From: Muriel Bittencourt de Liz [mailto:mur...@grucad.ufsc.br] Sent: Wednesday, September 01, 1999 8:55 PM To: Lista de EMC da IEEE Subject: Doubt on household equipment interference Dear Members I'd like to solve a doubt.. suppose the following: I have an electrical installation in a house. The feeding is with three-phase and one neutral conductors. If I connect a TV and a blender in the same phase, the blender generates interference (lines) in the TV screen. If I connect the TV in one phase, and the blender in another, the TV will have interference??? The neutral conductor is the same for all (of course!) Seems very plain, but I'd like to know... :) Thanks in advance Muriel -- == Muriel Bittencourt de Liz GRUCAD - Conception Analysis of Electromagnetic Devices Group Federal University of Santa Catarina PO Box: 476 ZIP: 88040-900 - Florianspolis - SC - BRAZIL Phone: +55.48.331.9649 - Fax: +55.48.234.3790 e-mail: mur...@grucad.ufsc.br ICQ#: 9089332 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
