Rich,

     You mean after all this time it has never occurred to any of us to raise
     this question?  

     As a practical application, I would peg the fuse at less than 240 VA,
     so that it would trip below the 240 VA level.  However, your question
     is how to measure the 'continuous'!  

     For that matter, if the power level is not continuous but intermittent, 
     does this mean that it's O.K. even if the limit is exceeded????

               Tania Grant, Octel Communications Corporation
               [email protected]

______________________________ Reply Separator _________________________________
Subject: How long for continuous?
Author:  Rich Nute <[email protected]> at P_Internet_mail
List-Post: [email protected]
Date:    11/12/96 4:46 PM




Hello from San Diego:


With regard to IEC 950:

...........................................................


1.2.8.7   HAZARDOUS ENERGY LEVEL:  A stored energy level of
20 J or more, or an available continuous power level of 240
VA or more, at a potential of 2 V or more.


...........................................................

At what point in time after start of the measurement is the
available power considered "continuous"?

In the application, a fuse is used to limit the continuous
power to less than 240 VA.  At 240 VA, the fuse WILL operate -- 
but it may take up to the maximum fuse operating time.

Is this okay?

If not, what is the time after which 240 VA is considered to 
be continuous?


Best regards,
Rich


-------------------------------------------------------------
 Richard Nute                             Quality Department 
 Hewlett-Packard Company           Product Regulations Group 
 San Diego Division (SDD)          Tel   :      619 655 3329 
 16399 West Bernardo Drive         FAX   :      619 655 4979 
 San Diego, California 92127       e-mail:  [email protected] 
-------------------------------------------------------------



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