I agree with Jim and Carlos ,
If the design includes a specification that in case of a surge impulse
the equipment is switched off, ok that's fine.
It exhibits as specified so full compliance.
If I would like to have that power supply in my electronics, that's
another question.
If that is a go
s a bypass capacitor is
required also.
on the hot lead to ground.
Ralph
- Original Message -
From: "Derek Walton"
To: "Ralph Cameron"
Cc: ; "Jim Hulbert" ;
Sent: Thursday, January 13, 2000 3:12 PM
Subject: Re: Surge Test Performance Criterion
> Ralph,
>
&g
gt; Ralph Cameron
>
> EMC Consultant and Suppression of Consumer Electronic Equipment.
> (After sale)
>
> - Original Message -
> From: "Derek Walton"
> To:
> Cc: "Jim Hulbert" ;
> Sent: Thursday, January 13, 2000 8:57 AM
> Subject: Re: Surge Tes
addition of a single resistor.
Ralph Cameron
EMC Consultant and Suppression of Consumer Electronic Equipment.
(After sale)
- Original Message -
From: "Derek Walton"
To:
Cc: "Jim Hulbert" ;
Sent: Thursday, January 13, 2000 8:57 AM
Subject: Re: Surge Test P
Jim,
all the power supplies I design are capible of riding through the EN1000-4-5
surge.
I would class this as Cat A. Cat B would be if the power supply momentarally (
literally this could imply once the surge has gone ) dropped out, and came back
right away on its own. I would expect to see non
ystems Inc.
> -Original Message-
> From: rehel...@mmm.com [SMTP:rehel...@mmm.com]
> Sent: Thursday, January 13, 2000 7:54 AM
> To: emc-p...@majordomo.ieee.org
> Subject: Re: Surge Test Performance Criterion
>
>
>
>
> I agree with Carlos.
>
&g
Sorry Carlos,
I can't go along with this one. If I'm using my PC here in the USA midwest and a
storm comes along I don't want my PC shutting itself off every few minutes
Only
been hit directly with two lightning strikes this last 2 years, but during a
storm
you can continuously heat squeaki
E. Heller/US-Corporate/3M/US)
Subject: Re: Surge Test Performance Criterion
Jim,
I agree with you, on the basis that in this case, a complete shut-down is a
designed-in function of the product, and the standard says "No degradation
of
performance or loss of function is allowed below
Jim,
I agree with you, on the basis that in this case, a complete shut-down is a
designed-in function of the product, and the standard says "No degradation of
performance or loss of function is allowed below a performance level specified
by the manfucturer". You, as the manufacturer, are specify
Jim:
To me, the usual interpretation of performance criteria "B" is that the product
has some deviation of performance during the test but the basic functionality of
the product remains. The product must resume normal operation after the test,
without operator intervention. Complete shutdown of
Hi Jim,
A guideline I use for Criteria B is that the E.U.T may exhibit degradation
due to the field disturbance, but must self-recover after the field
disturbance is removed. What I have seen is that in certain power supplies
the secondary output voltage drops due to the surge, causing telco syst
Jim,
I forget where I procured this definition for Criteria B but if you abide by
this definition, it would indicate to me that Due Diligence was exercised
when testing your apparatus. 10 minutes however seems to be a bit long,
where does this constraint come from?
"the apparatus shall continue
Jim,
The situation you describe would be criterion C, because there is a
"temporary loss of function" and it is "recoverable".
Scott Lacey
> -Original Message-
> From: Jim Hulbert [SMTP:hulbe...@pb.com]
> Sent: Wednesday, January 12, 2000 3:08 PM
> To: emc-p...@ieee.org
> Subject:
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