ors your side.
Brian
From: Richard Nute [mailto:ri...@ieee.org]
Sent: Thursday, March 08, 2018 1:42 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] IEC60950-1 Limited Power Source via IC current limiter
In my early days in product safety, safety was prohibited from relying on
conduction in a
[PSES] IEC60950-1 Limited Power Source via IC current limiter
Probably some fail-safe, some reliable. I think that this is why 'safety'
involves risk-assessment, not just meeting standards.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk<http://www.woo
testing to address this issue. Mike ShermanGraco Inc. Sent from XFINITY Connect Mobile App-- Original Message --From: John WoodgateTo: EMC-PSTC@LISTSERV.IEEE.ORGSent: March 8, 2018 at 3:57 PMSubject: Re: [PSES] IEC60950-1 Limited Power Source via IC current limiter
Probably some
Probably some fail-safe, some reliable. I think that this is why
'safety' involves risk-assessment, not just meeting standards.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2018-03-08 21:41, Richard Nute wrote:
In my early days in produ
In my early days in product safety, safety was prohibited from relying on
conduction in a vacuum, gas, or semiconductor.
Today. we rely on semiconductor current limiters and similar devices, e.g.,
GFCI control circuits.
Are such limiters and control circuits fail-safe devices?
oodgate
> Sent: Monday, March 5, 2018 1:07 PM
> To: EMC-PSTC@LISTSERV.IEEE.ORG
> Subject: Re: [PSES] IEC60950-1 Limited Power Source via IC current limiter
>
> The standard says '...meets a suitable test program as given in Annex CC'
> [not Annex C]. It does not say 'sh
@LISTSERV.IEEE.ORG
Subject: Re: [PSES] IEC60950-1 Limited Power Source via IC current limiter
The standard says '...meets a suitable test program as given in Annex CC' [not
Annex C]. It does not say 'shall meet the test program given in Annex CC'. As
you know, the manufactu
The standard says '...meets a suitable test program as given in Annex
CC' [not Annex C]. It does not say 'shall meet the test program given
in Annex CC'. As you know, the manufacturer is permitted to decide (and
document) that a part meeting UL2367 is acceptable, and it would be up
to a regul
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