The way I understand this is that if we are in the USA, then our 240 volts is likely Bi-Phase, not like Europe which has the Line swinging about the neutral by 240 volts. In that case you can use a V LISN, or two single phase LISN’s.
In the USA with a Bi-Phase you need 3 LISN’s. When I test these, I use a 3 phase LISN rather than 3 individual LISN’s. It’s crazy to split the power cord to reach the mains terminal on each LISN. Take care listening to sales guys…. My 10 cents, Derek. > On Apr 5, 2024, at 7:24 PM, Ken Javor <[email protected]> wrote: > > I may be missing something here, but you would need a pair of LISNs for a box > that runs off a single phase and neutral. Most equipments of which I am > aware use the same power connector pins whether 120 or 240 V. In that case, > you just need one pair of LISNs. If for some reason your box runs off both > 120 V and 240 simultaneously, then you would need two pairs of LISNs. > > Current rating is whatever you need. I believe there are several > manufacturers offering models designed for up to 16 A. > > -- > > Ken Javor > Ph: (256) 650-5261 > > > Hello and Happy Friday, > > I've got a sales guy telling me our 120/240V EUT needs two pair of > single-phase LISNs for our CE test bench. > That's only slightly cheaper than a 3-phase unit at > 50A, but very bulky. > > Can someone remind me why I'd need 4, 50A single-phase LISNs for our unit? I > could see 3 (one for the neutral) but I'm not so savvy on EMC test equipment. > > thanks, > > Colorado Brian > From: Brian Gregory <[email protected] > <mailto:[email protected]>> > Reply-To: Brian Gregory <[email protected] > <mailto:[email protected]>> > Date: Friday, April 5, 2024 at 5:01 PM > To: <[email protected] <mailto:[email protected]>> > Subject: [PSES] Conducted emissions for Split-phase 120/240V needs > three-phase LISN? > > 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 > [email protected] <mailto:[email protected]> > All emc-pstc postings are archived and searchable on the web at: > https://www.mail-archive.com/[email protected]/ > <https://www.mail-archive.com/[email protected]/%20> > Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> > Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to > unsubscribe) <https://ewh.ieee.org/soc/pses/list.html> > List rules: https://ewh.ieee.org/soc/pses/listrules.html > For help, send mail to the list administrators: > Mike Sherman at: [email protected] <mailto:[email protected]> > Rick Linford at: [email protected] <mailto:[email protected]> > For policy questions, send mail to: > Jim Bacher at: [email protected] <mailto:[email protected]> > To unsubscribe from the EMC-PSTC list, click the following link: > https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 > 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 > [email protected] <mailto:[email protected]>All emc-pstc > postings are archived and searchable on the web at: > https://www.mail-archive.com/[email protected]/ > > Website: https://ewh.ieee.org/soc/pses/ <https://ewh.ieee.org/soc/pses/> > Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to > unsubscribe) <https://ewh.ieee.org/soc/pses/list.html> > List rules: https://ewh.ieee.org/soc/pses/listrules.html > > For help, send mail to the list administrators: > Mike Sherman at: [email protected] <mailto:[email protected]> > Rick Linford at: [email protected] <mailto:[email protected]> > For policy questions, send mail to: > Jim Bacher at: [email protected] <mailto:[email protected]> > To unsubscribe from the EMC-PSTC list, click the following link: > https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 > - ---------------------------------------------------------------- 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 [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
