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:      Surge Test Performance Criterion
> 
> 
> 
> 
> A product has a switched mode power supply with a current sensing circuit
> that
> causes the supply to shut down when a surge pulse is applied to the AC
> mains in
> accordance with EN61000-4-5/IEC1000-4-5.  After about 10 minutes, the
> supply can
> be turned back on and normal operation of the product can be resumed by
> the
> operator.   Does this product conform to criterion B of the EN 50082-1 or
> EN
> 55024 standards?  I believe it does because the sensing circuit is
> specifically
> designed to protect the product against this kind of voltage/current surge
> and
> the product operation is fully recoverable by the operator afterward.
> However,
> I would like to hear how others who do this testing would interpret this.
> 
> Jim Hulbert
> Senior Engineer - EMC
> Pitney Bowes
> 
> 
> 
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