Agree with all of Gert's message except the one that contradicts mine: the internal green wire connection should not be the same as the external, and the external connection should not penetrate the chamber wall. Either of these practices will degrade chamber shielding effectiveness, and neither is either necessary or desirable.
Ken Javor Phone: (256) 650-5261 > From: "ce-test, qualified testing bv - Gert Gremmen" <g.grem...@cetest.nl> > Reply-To: "ce-test, qualified testing bv - Gert Gremmen" <g.grem...@cetest.nl> > Date: Tue, 14 Jun 2016 10:34:29 +0200 > To: <EMC-PSTC@LISTSERV.IEEE.ORG> > Conversation: Screened room mains filter > Subject: Re: [PSES] Screened room mains filter > > Hi Ian, > > Indeed a 2-phase is enough. Ground goes directly to the > chambers ground-bolt, close to the filter. I recommend installing > an extra (redundant) separate 4mm2 or larger solid ground bonding > connector to your buildings main ground, as the leakage current for official > room-filters may easily exceed 1 A (> 1000 mA), and the infamous "single > fault" won't be lethal then. > > > Same goes for the internal (in the screened room) ground, it's best connected > to same bolt > as the outside ground. > > Most filter have internal discharge resistors, but it cannot be said enough > verify that the internal capacitors are discharged before servicing, or > mount your own discharge resistor in the circuit. > > > I suppose this is well known on this list but: > Note that any grounding is irrelevant for the screening properties. > > Regards, > > Ing. Gert Gremmen > Approvals manager > ------------------------------------------------------------------------------ > ------ > > > + ce marking of electrical/electronic equipment > + Independent Consultancy Services > + Compliance Testing and Design for CE marking > according to EC-directives: > - Electro Magnetic Compatibility 2004/108/EC > - Electrical Safety 2006/95/EC > - Medical Devices 93/42/EC > - Radio & Telecommunication Terminal Equipment 99/5/EC > + Improvement of Product Quality and Reliability testing > + Education > > Web: www.cetest.nl (English) > Phone : +31 10 415 24 26 > ------------------------------------------------------------------- > This e-mail and any attachments thereto may contain information > that is confidential and/or protected by intellectual property rights > and are intended for the sole use of the recipient(s) named above. > Any use of the information contained herein (including, but not > limited to, total or partial reproduction, communication or > distribution in any form) by persons other than the designated > recipient(s) is prohibited. If you have received this e-mail in error, > please notify the sender either by telephone or by e-mail and > delete the material from any computer. > Thank you for your co-operation. > > From: McBurney, Ian [mailto:ian.mcbur...@allen-heath.com] > Sent: Monday 13 June 2016 15:00 > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: [PSES] Screened room mains filter > > Dear colleagues > > I am looking into purchasing a single phase 50/60Hz ac mains input filter for > a screened room. > However; I am not sure whether to purchase a 2 line multistage filter or a 3 > line. > I'm assuming the filtering is only required on the live and neutral lines as > the earth should be bonded to the screened room. > > Your advice will be appreciated. > > Many thanks in advance. > > Ian McBurney > Design & Compliance Engineer. > > Allen & Heath Ltd. > Kernick Industrial Estate, > Penryn, Cornwall. TR10 9LU. UK > T: 01326 372070 > E: ian.mcbur...@allen-heath.com > > > Allen & Heath Ltd is a registered business in England and Wales, Company > number: 4163451. Any views expressed in this email are those of the individual > and not necessarily those of the company. > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org> > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) > List rules: http://www.ieee-pses.org/listrules.html > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
