AnsweredAssumed Answered

3 Phase Powersupply for Powermeters

Question asked by DavidX on Aug 10, 2014
Latest reply on Aug 18, 2014 by hmani

Hi,

 

IEC62053 states that a meter must be able to operate from

any single phase with 70% nominal voltage.

 

My first idea was to use 3 small transformers to get this done,

but is there a smarter solution for getting 3.3V / 90mA

for ADE7858 and one isolated µC from 3 Phase 400V AC?

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