My response to Mr. Horvat's message was indeed blunt, but
_was_not_ personal. If my response lacked the decorum some
delicate souls crave, then certainly those self-same
creatures can take me to task off the list (some already
have), rather than making personal comments on the list.
I have
I read in !emc-pstc that richhug...@aol.com wrote (in 6D8B5870.6AD0B19A
.0ba45...@aol.com) about 'Dielectric withstand voltage for power
supplies' on Fri, 27 Jun 2003:
John,
What you highlight is one of the differences between traditional ICT
equipment and traditional radio equipment. ICT
those who constructively contributed, a great thanks.
PH
From: Reginald Henry [mailto:rhe...@vicon-cctv.com]
Sent: Friday, June 27, 2003 8:31 AM
To: 'Alexandru Guidea'; 'emc-p...@ieee.org'
Subject: RE: Dielectric withstand voltage for power supplies
Alex,
My feeling actually. If we are here
I read in !emc-pstc that Reginald Henry rhe...@vicon-cctv.com wrote
(in 8FACEFD20E5BD311BA5200E018C14B4401A2C30C@VICONMAIL) about
'Dielectric withstand voltage for power supplies' on Fri, 27 Jun 2003:
So, if there should be some looking up of information by the questioner,
point him or her in the
by the questioner,
point him or her in the direction as to where to find it without the
negative comments.
Peace,
RH
From: Alexandru Guidea [mailto:gui...@cae.com]
Sent: Thursday, June 26, 2003 4:09 PM
To: Peter Horvat; 'emc-p...@ieee.org'
Subject: RE: Dielectric withstand voltage for power supplies
Subject: Re: Dielectric withstand voltage for power supplies
I read in !emc-pstc that richhug...@aol.com wrote (in 44E75E95.7A170092
0ba45...@aol.com) about 'Dielectric withstand voltage for power
supplies' on Thu, 26 Jun 2003:
[R_Hughes ] Technically incorrect: it is also possible to have a design
Subject: Re: Dielectric withstand voltage for power supplies
I read in !emc-pstc that richhug...@aol.com wrote (in 44E75E95.7A170092
0ba45...@aol.com) about 'Dielectric withstand voltage for power
supplies' on Thu, 26 Jun 2003:
[R_Hughes ] Technically incorrect: it is also possible to have a design
I read in !emc-pstc that richhug...@aol.com wrote (in 44E75E95.7A170092
.0ba45...@aol.com) about 'Dielectric withstand voltage for power
supplies' on Thu, 26 Jun 2003:
[R_Hughes ] Technically incorrect: it is also possible to have a design
where the secondary circuit is floating from earth and
Group,
Please see my comments below...
Richard Hughes
From: j...@jmwa.demon.co.uk [mailto:j...@jmwa.demon.co.uk]
Sent: Thursday, June 26, 2003 9:24 PM
To: emc-p...@majordomo.ieee.org
Subject: Re: Dielectric withstand voltage for power supplies
I read in !emc-pstc that Alexandru Guidea
Peter,
Most people want the output to meet the requirements for an SELV Circuit.
Probably the transformers and opto-couplers (if any, in the feedback loop)
within the power supply will meet the requirement for Reinforced Insulation
and this implies an ability to withstand 3,000 Vac. However,
Hello Peter
PC power supplies are Class I devices. By definition in EN60950 clause
1.2.4.1 the power supply only requires basic insulation between Primary and
earth, primary and secondary, and must be provided with a protective earth.
The basic insulation + protective earth provides the two
Peter,
Most PC power supplies evaluated according to EN60950 or IEC60950 use Basic
insulation from the Primary circuitry to the earthed chassis or earthed parts
(Class I). They also use Reinforced insulation from Primary to Secondary
(Input to Output). If you happen to locate a Class II power
Peter-
This appears to be a case of not reading the standard.
Please buy a copy and read it.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
From: Peter Horvat
Sent: Thursday, June 26, 2003 6:37 AM
Hi,
Can
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