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Question related to Single Fault Conditions

P

ps_alsa

#1
In 60601-1 III ed. in 8.1 b) the Standard states:
"SINGLE FAULT CONDITION includes:
- short circuit of any one insulation that complies with the requirements for one MEANS OF
PROTECTION as specified in 8.8;
NOTE This includes short circuiting of either constituent part of DOUBLE INSULATION that complies with 8.8."

This means:
all insulations that constitute a MEANS OF PROTECTION (i.e. all the insulations existing on my eletromedical device)
OR
all insulations that constitute a MEANS OF PROTECTION part of double insulation ?
 
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#2
I personally can't help, but here is a quick "Bump" - My Thanks in advance to anyone who can help with this one.
 
#3
- short circuit of any one insulation that complies with the requirements for one MEANS OF PROTECTION
The SFC requirement applies to all insulations (that provide a MOP).
But each insulation is shorted separately - one at a time.

For double insulation that means 2 tests - one for each half of the double insulation.
 
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