[PSES] EN 55011:2016 + A2:2021

[Amund Westin]

I can’t find any reference to A2:2021 in any EMC Harmonized standard list. 

Does it mean we should not make any reference to in in the DoC?

 

 

BR

Amund

 


-

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 


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://ewh.ieee.org/soc/pses/listrules.html

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:  
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

Re: [PSES] Class 1 appliance

[John Woodgate]

I put some comments below.

On 2023-11-06 14:08, Scott Xe wrote:
Last week, we received a sample of an induction hob from a supplier. 
The unit is fitted with a 3-core power card and does not have a class 
II symbol. The earthing core is terminated at a small copper pad on 
the printed circuit board with a protective ground symbol (IEC 60417 - 
5019) next to the terminal.  It is shocking to note that the copper 
pad is standalone and not connected to the unit circuitry.  We made an 
inquiry to the supplier and replied that the product was designed by 
the engineer who left the company.
/JMW: That alone should indicate that you should have nothing to do with 
the product, unless you are a test house, paid for assessing its safety./


I have two questions regarding the appliance. Firstly, can it be rated 
as a class 1 appliance?


/JMW: If it passes all the safety tests for a Class 1 appliance, it is a 
Class 1 appliance. But it remains a suspect design./


Secondly, what are the main purposes of installing a 3-core power 
cable that has no obvious functionality?


/JMW: There is a strong temptation to do that if it's too difficult to 
meet the Class II requirements./



Additionally, while examining the PCB layout, I noticed punched holes 
for a resistor and two capacitors connected in series, with the 
capacitors connected in parallel first. Currently, there are no 
components present in those holes. I would like to know if these 
components are necessary for EMC compliance.


/JMW: There is no way anyone can advise you on that, even if we could 
see where the 'missing' components appear in the schematic. You have to 
test it as it is and see whether it meets the EMC requirements./



Your advice is appreciated!


Thanks and regards,


Scott






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 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://ewh.ieee.org/soc/pses/listrules.html

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 at: 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 

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://ewh.ieee.org/soc/pses/listrules.html

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:  
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1

[PSES] Class 1 appliance

[Scott Xe]

Last week, we received a sample of an induction hob from a supplier. The
unit is fitted with a 3-core power card and does not have a class II
symbol. The earthing core is terminated at a small copper pad on the
printed circuit board with a protective ground symbol (IEC 60417 - 5019)
next to the terminal.  It is shocking to note that the copper pad is
standalone and not connected to the unit circuitry.  We made an inquiry to
the supplier and replied that the product was designed by the engineer who
left the company.

I have two questions regarding the appliance. Firstly, can it be rated as a
class 1 appliance? Secondly, what are the main purposes of installing a
3-core power cable that has no obvious functionality?


Additionally, while examining the PCB layout, I noticed punched holes for a
resistor and two capacitors connected in series, with the capacitors
connected in parallel first. Currently, there are no components present in
those holes. I would like to know if these components are necessary for EMC
compliance.


Your advice is appreciated!


Thanks and regards,


Scott

-

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 


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://ewh.ieee.org/soc/pses/listrules.html

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:  
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1