Brian — Good thing to be paying close attention to! We did something similar to what Ken describes. I really like the ~ sign, because “AC” is not universally accepted; it’s “CA” in Spanish, for example. I encouraged its use on single phase products for international markets. I seem to recall that providing a frequency, e.g., “50/60 Hz,” eliminates the need to use the ~ sign, because having a frequency automatically denotes AC. For “phase,” you can use the phi sign, a circle with a slash on it. As I recall, this is quite common on markings on motors and transformers. You might find some while walking around your factory. Mike Sherman Sherman PSC LLC
> On 04/09/2025 3:06 PM CDT IBM Ken <ibm...@gmail.com> wrote: > > > Hi Brian; > I struggled a bit with this as well. I don't like using "3~400V" because > (even with a space) it could be misinterpreted as "three to 400 volts" > ridiculous as that may be... > > For "Three phase with neutral" I did not want to use any (English) text as > our product is shipped worldwide. I settled on using "Y" for 3 phases+ > neutral and using a triangle symbol (delta) for 3 phase without neutral. To > further clarify I did add the (languagless) text "3W+N+PE" and "3W + PE" for > wye and delta, respectively. > > Our CBTL accepted it and it is in use today.on product. > > -Ken A > > > > On Wed, Apr 9, 2025 at 3:55 PM Brian Kunde <bkundew...@gmail.com > mailto:bkundew...@gmail.com> wrote: > > > I am reading through IEC 61293:2020 and comparing it to what some of the > > Product Standards say and examples on the Web regarding the Voltage Rating > > that would go on a Nameplate or Label. I am really struggling with 3 phase > > voltage ratings. Industrial machines show this information as a table, but > > we want to just have a single line Rating. Our equipment is not a > > transformer or motor driven device, but it is powered by 3-phase. Let me > > know if this is correct or if there is a better way. Thank you. > > The Other Brian > > > > Single Phase = 230V~ > > Three Phase (no neutral) = 400V 3~ or should it be 3~400V > > Three Phase with neutral = 230/400V 3/N~ or should it be 3/N~230/400V > > > > Is the PE conductor assumed or should it be included in the Rating, as in > > these examples? > > Three Phase without neutral and PE = 400V 3/PE~ or 3/PE~230/400V > > Three Phase with neutral and PE = 230/400V 3/N/PE~ or 3/N/PE~230/400V > > > > For a Three Phase device that uses the Neutral, do you always show the > > Phase Voltage in addition to the Line Voltage, or it is assumed? > > Does the "3~" go after the voltage or before? The IEC 61293:2020 shows it > > before, but I generally see it after. > > > > > > > > --------------------------------------------- > > > > 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-PSTC@LISTSERV.IEEE.ORG mailto:EMC-PSTC@LISTSERV.IEEE.ORG > > > > All emc-pstc postings are archived and searchable on the web at: > > https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ > > > > 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://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf > > > > For help, send mail to the list administrators: > > Mike Sherman at: msherma...@comcast.net mailto:msherma...@comcast.net > > Rick Linford at: linf...@ieee.org mailto:linf...@ieee.org > > > > For policy questions, send mail to: > > Jim Bacher at: j.bac...@ieee.org mailto:j.bac...@ieee.org > > > > > > --------------------------------------------- > > > > 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 > EMC-PSTC@LISTSERV.IEEE.ORG > > All emc-pstc postings are archived and searchable on the web at: > https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ > > > > 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://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf > > For help, send mail to the list administrators: > Mike Sherman at: msherma...@comcast.net mailto:msherma...@comcast.net > Rick Linford at: linf...@ieee.org mailto:linf...@ieee.org > > For policy questions, send mail to: > Jim Bacher at: j.bac...@ieee.org mailto:j.bac...@ieee.org > > > --------------------------------------------- > > 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 EMC-PSTC@LISTSERV.IEEE.ORG All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf For help, send mail to the list administrators: Mike Sherman at: msherma...@comcast.net Rick Linford at: linf...@ieee.org For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
