Designing an RMS Circuit for 5A Output from 15/5A CT Using Voltage Divider

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#1 21660170 23 Nov 2011 07:15

Gaurav Sheta Gaurav Sheta

Anonymous

Post #1
21660170 23 Nov 2011 07:15

I have to Ct 15/5 amp. 5amp output is input of rms by using voltage divider cricuit. so how to make rms circuit. given circuit diagram vauls varing by ct current
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#2 21660171 23 Nov 2011 15:52

Francois De La Roche Francois De La Roche

Anonymous

Post #2
21660171 23 Nov 2011 15:52

Could you precise more what application are you trying to do? Why do you need RMS current value?

Where the Ct current comes from and what's the output load?
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#3 21660172 26 Nov 2011 13:24

Gaurav Sheta Gaurav Sheta

Anonymous

Post #3
21660172 26 Nov 2011 13:24

sorry sir i want rms voltage.
i use this circuit in relay. my project is relay using micro controller.
so the first measured ct current than voltage divider through rms cricuit and next multiplexer and adc and microcontroller.
#4 21660173 29 Nov 2011 13:52

Francois De La Roche Francois De La Roche

Anonymous

Post #4
21660173 29 Nov 2011 13:52

Depends on if you application is using AC or DC voltage/current.
If it is DC you don't need to have the RMS value.

For AC many op-amps circuit could lead you to compute a RMS value (google it), and there exist a tons of rms-to-dc converters.
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Designing an RMS Circuit for 5A Output from 15/5A CT Using Voltage Divider

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