Well, if you can maintain the 150 ohm to AE, your current cannot exceed Uo/150, right?
> -----Original Message----- > From: [email protected] > [mailto:[email protected]]On Behalf Of ext > [email protected] > Sent: 23 January, 2004 19:08 > To: [email protected] > Subject: RE: Clamp Injection EN61000-4-3 Question > > > > 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 > 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
