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Most of the energy produced by the CT windings is being wasted in the internal burden resistor. See this data sheet to see what I mean. I calculate that it has a 60 Ω burden resistor and, at full p...
Answer
#3: Post edited
by
Andy aka
·
2022-10-22T15:47:03Z (about 2 years ago)
- Most of the energy produced by the CT windings is being wasted in the internal burden resistor. See this [data sheet](https://www.arduino.cc/documents/datasheets/E000020_Non-invasiveAC%20currentSensor30A.pdf) to see what I mean. I calculate that it has a 60 Ω burden resistor and, at full primary current (30 amps) it wastes nearly 17 mW of power.
- At 3 amps, it wastes only 167 μW.
Given that your circuit current consumption is 6 μA at an estimated (by me) voltage of (say) 5 volts, your power might be 30 μW. So, it's doable but not with a CT with built-in burden resistor. Look for another is my advice.
- Most of the energy produced by the CT windings is being wasted in the internal burden resistor. See this [data sheet](https://www.arduino.cc/documents/datasheets/E000020_Non-invasiveAC%20currentSensor30A.pdf) to see what I mean. I calculate that it has a 60 Ω burden resistor and, at full primary current (30 amps) it wastes nearly 17 mW of power.
- At 3 amps, it wastes only 167 μW.
- Given that your circuit current consumption is 6 μA at an estimated (by me) voltage of (say) 5 volts, your power might be 30 μW. So, it's doable but not so easily-doable with a CT with built-in burden resistor. Look for another CT is my advice.
#2: Post edited
by
Andy aka
·
2022-10-22T13:32:04Z (about 2 years ago)
Most of the energy produced by the CT windings is being wasted in the internal burden resistor. See this [data sheet](https://www.arduino.cc/documents/datasheets/E000020_Non-invasiveAC%20currentSensor30A.pdf) to see what I mean. I calculate that it is a 60 Ω resistor and, at full primary current (30 amps) it wastes nearly 17 mW of power. At 3 amps, it wastes al lot less at 167 μW.Given that your current consumption is 6 μA at an estimated (by me) voltage of (say) 5 volts, your power might be 30 μW. So, it's doable but not with a CT with built-in burden resistor. Look for another is my advice.
- Most of the energy produced by the CT windings is being wasted in the internal burden resistor. See this [data sheet](https://www.arduino.cc/documents/datasheets/E000020_Non-invasiveAC%20currentSensor30A.pdf) to see what I mean. I calculate that it has a 60 Ω burden resistor and, at full primary current (30 amps) it wastes nearly 17 mW of power.
- At 3 amps, it wastes only 167 μW.
- Given that your circuit current consumption is 6 μA at an estimated (by me) voltage of (say) 5 volts, your power might be 30 μW. So, it's doable but not with a CT with built-in burden resistor. Look for another is my advice.
#1: Initial revision
by
Andy aka
·
2022-10-22T13:30:51Z (about 2 years ago)
Most of the energy produced by the CT windings is being wasted in the internal burden resistor. See this [data sheet](https://www.arduino.cc/documents/datasheets/E000020_Non-invasiveAC%20currentSensor30A.pdf) to see what I mean. I calculate that it is a 60 Ω resistor and, at full primary current (30 amps) it wastes nearly 17 mW of power. At 3 amps, it wastes al lot less at 167 μW. Given that your current consumption is 6 μA at an estimated (by me) voltage of (say) 5 volts, your power might be 30 μW. So, it's doable but not with a CT with built-in burden resistor. Look for another is my advice.