Burden Resistor calculation: Difference between revisions
Jump to navigation
Jump to search
| Line 3: | Line 3: | ||
==Burden Resistor Formulae== | ==Burden Resistor Formulae== | ||
R = ( | R = (Vadc * Nturns) / (2√2 * Irms) | ||
'''R''': Burden resistor value in Ohm<br> | '''R''': Burden resistor value in Ohm<br> | ||
''' | '''Vadc''': 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-013-000 is 2000 turns.<br> | :SCT-013-000 is 2000 turns.<br> | ||
Revision as of 12:55, 11 March 2019
Burden Resistor Formulae
R = (Vadc * Nturns) / (2√2 * Irms)
R: Burden resistor value in Ohm
Vadc: ADC max voltage range (usually 3.3V)
Nturns: Number of CT sensor turns (see specs).
- SCT-013-000 is 2000 turns.
- SCT-019 is 6000.
- SCT-006 is 800.
Irms: Max current to be read in Ampere (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