Mr. Nute,
Per IEV definition 192-10-06, fail-safe is:
"capable of preserving safety in the case of failure
Note 1 to entry: The safe conditions should be defined for the particular
application."
Per IEC62368-1, fail-safe only applies to stuff in annex K (safety interlocks).
Where the
Yes new GFCIs are required to have built in automatic testing as most old ones
installed are not getting the required periodic manual testing.
From: MIKE [mailto:msherma...@comcast.net]
Sent: Thursday, March 08, 2018 5:34 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] IEC60950-1 Limited
I regard North American household GFCIs and industrial shunt trip GFCIs to not be fail safe because they can fail silently and therefore require period testing to verify continued functionality. I believe that the UL standard for GFCIs has recently been updated to require some periodic self
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
0. An 'appliance' (white goods) and ITE have similar, but not same,
requirements for Class II and Class III equipment.
1. Unknown, and your definition is incomplete. Dependent on rating of the power
source to the Class III device. SELV output rating does not imply Class III
equipment. By
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