Burden Resistor calculation: Difference between revisions
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==Burden Resistor Formulae== | ==Burden Resistor Formulae== | ||
R = (Vcc * | R = (Vcc * Nturns) / (2√2 * Irms) | ||
'''R''': Burden resistor value in Ohm<br> | '''R''': Burden resistor value in Ohm<br> | ||
'''Vcc''': ADC max voltage range (usually 3.3V)<br> | '''Vcc''': ADC max voltage range (usually 3.3V)<br> | ||
''' | '''Nturns''': Number of CT sensor turns<br> | ||
'''Irms''': Max current to be read in rms<br> | '''Irms''': Max current to be read in rms<br> | ||
==Current Coefficient Formulae== | |||
This will compute ICAL. | |||
ICAL = Nturns / R | |||
'''ICAL''': Current Coefficient | |||
'''R''': Burden resistor value in Ohm<br> | |||
'''Nturns''': Number of CT sensor turns<br> | |||
Revision as of 16:07, 13 May 2017
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
Irms: Max current to be read in rms
Current Coefficient Formulae
This will compute ICAL.
ICAL = Nturns / R
ICAL: Current Coefficient
R: Burden resistor value in Ohm
Nturns: Number of CT sensor turns