Re: [PSES] Surface Creepage & Air Clearance Calculator - IEC 60601-1 3.1ed

[Leo Eisner]

Hi Vincent,

IEC 60601-1 is currently at ed. 3.1 but it depends on the national regulator 
you submit your medical device you are submitting to meet the proper version(s) 
of the standard and any applicable collateral (IEC 60601-1-XX like EMC IEC 
60601-1-2) and any applicable particular stds (IEC 60601-2-XX like High 
Frequency Surgical equipment IEC 60601-2-2).  You also want to make sure you 
are using the properly aligned versions between the general standard (IEC 
60601-1) and the collaterals and the particular stds otherwise chaos ensues.

To answer your questions:

(1) There is no public calculator out there.  I know some people have done 
their own but I would not be confident that the numbers are all correct.  There 
are a lot of tables in 3rd ed & ed. 3.1 and values do get mixed up.

(2) Basically true but not every single value translated exactly over to 3rd ed 
& ed. 3.1.

(3) There is a lot more to creepage and air clearance & table 7 are the Test 
voltages for Means of Operator Protection not for Creepage & Air-clearance for 
Means of Operator Protection.  

Remember the std is based on the concept of a min of 2 levels of protection so 
the device is always safe if one means is lost (like in a single fault).  The 
patient needs to be protected at a much higher level than a user of IT 
equipment.  Standards are still consensus built and that means they are still 
the minimum level by consensus of safety but I do not always agree that is 
sufficient.  

Table 12 is creepage & air-clearance for Means of Patient Protection, and you 
need to know if 1 or 2 means is needed.
Table 13 is Min Air Clearance providing Means of Operator Protection from the 
Mains Part + you need to consider Table 14 as well.
Table 15 is for Min Air Clearances for Means of Operator Protection in 
Secondary Ckts.
Table 16 is for Creepage distances providing Means of Operator Protection

But you also need to know about and follow the rules in 8.9.1.1 to 8.9.1.15.

I am on the US National Committee & IEC Committees for IEC SC62A & D, am the US 
Co-chair for SC62D, among other Working Groups, Maintenance Teams, etc. 
involved in IEC 60601-1.  If you want further training or details please 
contact me direct (see below).  
  

Thx,

Leonard (Leo) Eisner, P.E.
Principal Consultant, Eisner Safety Consultants
Phone: (503) 244-6151
Mobile: (503) 709-8328
Email: l...@eisnersafety.com
Website: www.EisnerSafety.com
 

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> On May 18, 2017, at 7:03 AM, Vincent Lee 
> <08e6c8d35910-dmarc-requ...@ieee.org> wrote:
> 
> Hi all,
> 
> Good day,
> 
> (1) Does anyone know where can we get a Surface Creepage & Air Clearance 
> Calculator based on IEC 60601-1 3.1ed ?
> 
> (2) I was told that surface creepage and air clearance distance stated in IEC 
> 60950-1 2ed is used as Mean of Operator Protection (MOOP) while those stated 
> in IEC 60601-1 2ed is used as Mean of Patient Protection (MOPP), is this true 
> ?
> 
> (3) It is rather confusing given the 7 tables of creepage and clearance 
> distance inn IEC 60601-1 3rd, is there any way to simplify ?
> 
> Hope to hear from you soon. Thank you & have a nice day.
> 
>  
> Regards, Vincent
> -
> 
> 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 
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Re: [PSES] Surface Creepage & Air Clearance Calculator - IEC 60601-1 3.1ed

[Peter Tarver]

Is this not in IEC 60601-1 3.1ed?


Peter Tarver

From: Vincent Lee [mailto:08e6c8d35910-dmarc-requ...@ieee.org]
Sent: Thursday, May 18, 2017 07:03
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Surface Creepage & Air Clearance Calculator - IEC 60601-1 3.1ed

Hi all,

Good day,

(1) Does anyone know where can we get a Surface Creepage & Air Clearance 
Calculator based on IEC 60601-1 3.1ed ?

(2) I was told that surface creepage and air clearance distance stated in IEC 
60950-1 2ed is used as Mean of Operator Protection (MOOP) while those stated in 
IEC 60601-1 2ed is used as Mean of Patient Protection (MOPP), is this true ?

(3) It is rather confusing given the 7 tables of creepage and clearance 
distance inn IEC 60601-1 3rd, is there any way to simplify ?

Hope to hear from you soon. Thank you & have a nice day.


Regards, Vincent
-


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[PSES] Surface Creepage & Air Clearance Calculator - IEC 60601-1 3.1ed

[Vincent Lee]

Hi all,
Good day,
(1) Does anyone know where can we get a Surface Creepage & Air Clearance 
Calculator based on IEC 60601-1 3.1ed ?
(2) I was told that surface creepage and air clearance distance stated in IEC 
60950-1 2ed is used as Mean of Operator Protection (MOOP) while those stated in 
IEC 60601-1 2ed is used as Mean of Patient Protection (MOPP), is this true ?
(3) It is rather confusing given the 7 tables of creepage and clearance 
distance inn IEC 60601-1 3rd, is there any way to simplify ?
Hope to hear from you soon. Thank you & have a nice day.

 Regards, Vincent

-

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discussion list. To post a message to the list, send your e-mail to 


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Mike Cantwell 

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David Heald: 

[PSES] Surface Creepage & Air Clearance Calculator - IEC 60601-1 3.1ed

[Vincent Lee]

Hi all,
Good day,
Does anyone know where can we get a Surface Creepage & Air Clearance Calculator 
based on IEC 60601-1 3.1ed ?
I was told that surface creepage and air clearance distance stated in IEC 
60950-1 2ed is used as Mean of Operator Protection (MOOP) while those stated in 
IEC 60601-1 2ed is used as Mean of Patient Protection (MOPP), is this true ?
It is rather confusing given the 7 tables of creepage and clearance distance 
inn IEC 60601-1 3rd, is there any way to simplify ?
Hope to hear from you soon. Thank you & have a nice day.

 Regards, Vincent

-

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:
http://www.ieee-pses.org/emc-pstc.html

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
Scott Douglas 
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: