My product is a relatively large, 19"-rack mounted device. And I made a (kind of obvious) mistake, it is -6 (conducted immunity) and not -3.
The chassis is supposed to be bonded to Safety Ground. 6.2.2.1 provides requirement to connect the EUT chassis to ground reference plane through CDN-M1 (to increase the CM impedance). 150 Ohm (plus/minus tolerancefrom chassis to GND is a moot point at the higher end of the tested frequency range, due to the impedance of the chassis and the attached cables vs. environment, that is in parallel to the CDN. Let me rephrase my original question: Am I allowed to measure current and stop the test if the current into EUT exceeds Uo/150, even if I can meet the formas requirements on the EUT and AE setup/impedances? Thanks, Neven > > You're right, not always (i.e. with safety class II). > But if there's earth terminal a M-1 is connected to it, see 6.2.1.1 > of 2nd Ed. > Ari > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]]On Behalf Of ext Oliver Betz > > Sent: 23 January, 2004 11:49 > > To: [email protected] > > Subject: RE: Clamp Injection EN61000-4-3 Question > > > > > > > > <[email protected]> wrote: > > > > [EN61000-4-6] > > > > > Some comments to Neven: > > > -When you use BCI clamp you can measure and limit the > > current as you describe. > > > -The impedance is not >150 ohms but with +/- tolerance, see Table 3. > > > -The EUT needs to have 150 ohms from chassis to earth so > > the impedance is not as low as you say > > > > Really "_chassis_ to earth" - where do you read this? > > > > Oliver > > -- > > Oliver Betz, Muenchen > > > > > > ------------------------------------------- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > Visit our web site at: http://www.ieee-pses.org/ > > > > To cancel your subscription, send mail to: > > [email protected] > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Ron Pickard: [email protected] > > Dave Heald: [email protected] > > > > For policy questions, send mail to: > > Richard Nute: [email protected] > > Jim Bacher: [email protected] > > > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > > > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ieee-pses.org/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
