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09/13/13 07:23
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#190025 - Selecting the right MCB
I have to select a MCB for a SMPS input side which is AC 230V.( Output is 24V dc @ 10A ) The data sheet for the SMPS reads " AC Current 1.4A operating and Cold Start Inrush 45A "

And in actual trials I have had MCBs rated for 2A / C type, trip when the SMPS is switched ON, particularly when the DC side load is connected at the time of switch ON.

So what would be the guideline to choose the right MCB ? ( Since the variation between normal operating current and Inrush current is so large )

Or should I simply migrate to the 2A / D type MCB which has a larger trip current setting?

Any help is welcome.



List of 14 messages in thread
Selecting the right MCB      Raghunathan      09/13/13 07:23      
   Take the D-Type...      Kai Klaas      09/13/13 09:11      
   MCB?        Michael Karas      09/16/13 01:59      
      Miniature Circuit Breaker        Kai Klaas      09/16/13 05:28      
         or "Magnetic", or "Mechanical", or ...      Andy Neil      09/16/13 15:59      
      Abbreviations        Raghunathan      09/23/13 09:26      
         the best way      Erik Malund      09/23/13 10:27      
         Clear Now      Michael Karas      09/23/13 23:50      
         No problem to use them - just be sure to *define* them first      Andy Neil      09/24/13 16:38      
            Good point      Raghunathan      09/24/13 21:57      
               Depends a bit...      Kai Klaas      09/25/13 05:35      
               Input current      Joseph Hebert      09/25/13 09:26      
                  Input current and safety      Raghunathan      09/27/13 06:23      
               Fuses and breakers      Oliver Sedlacek      09/26/13 01:50      

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