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> | ||
:SCT-013 is 2000 turns.<br> | |||
:SCT-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 12:43, 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).
- SCT-013 is 2000 turns.
- SCT-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