Burden Resistor calculation: Difference between revisions

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'''Vcc''': ADC max voltage range (usually 3.3V)<br>
'''Vcc''': ADC max voltage range (usually 3.3V)<br>
'''Nturns''': Number of CT sensor turns (see specs). <br>
'''Nturns''': Number of CT sensor turns (see specs). <br>
<&nbsp>SCT-013 is 2000 turns.<br>
&nbspSCT-013 is 2000 turns.<br>
<&nbsp>SCT-019 is 6000.<br>
&nbspSCT-019 is 6000.<br>
'''Irms''': Max current to be read in rms<br>
'''Irms''': Max current to be read in rms<br>



Revision as of 12:40, 3 March 2019


Burden Resistor Formulae

R = (Vcc * Nturns) / (2√2 * Irms)

R: Burden resistor value in Ohm
Vcc: ADC max voltage range (usually 3.3V)
Nturns: Number of CT sensor turns (see specs).
&nbspSCT-013 is 2000 turns.
&nbspSCT-019 is 6000.
Irms: Max current to be read in rms

Current Coefficient Formulae

This will compute ICAL.

ICAL = Nturns / R

ICAL: Current Coefficient
Nturns: Number of CT sensor turns
R: Burden resistor value in Ohm