I have a question about msp430fe427
I use MSP430FE427 to do a meter .
Then I would like to ask the current converter (CT) specification for msp430fe427.
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du ZI YAN said:I would like to ask the current converter (CT) specification for msp430fe427.
other than that, it's up to you to pick an apropriate CT and shunt. 2000A:5A is an option as good as a 10mA:10mA CT. Only the shunt that turns the secondary current into a voltage for AD conversion must be selected properly.
In our applicaiton (not this MSP, but it makes no difference), we use a 400A:66mA CT as well as a 100A:33mA and a 2000A:1V Rogowski sensor. The only thing that differs is the shunt resistor: 7,5Ohms, 15Ohms (actually 2*7.5 with a middle contact for both) or a 100k voltage divider for the Rogowski
And we have built special versions with a 2000:5A CT with a 0.1Ohms 2,5W shunt.