Current Transformer with Arduino
Lakshmi , 09-09-2019, 07:56 AM
Hi,
I have CT with below specs:
Primary Current: 100A, Turns ratio: 2500:1.
Solid core and PCB Mountable type.
Link: https://www.electrohms.com/product-ct1273-a1-rc
I'm trying to measure 60W Bulb current consumption using arduino.
I have followed this reference example:
with the burden value of 42 Ohms since in my case, for 100A input primary CT will generate a secondary of 40mA.
I tried to run the code. But I'm returning with a random value when bulb is off, current is showing 2.02 and when I turned bulb on it shows 1.85.
Could any one please help me with what I'm doing here?
I've used the same code.
I have CT with below specs:
Primary Current: 100A, Turns ratio: 2500:1.
Solid core and PCB Mountable type.
Link: https://www.electrohms.com/product-ct1273-a1-rc
I'm trying to measure 60W Bulb current consumption using arduino.
I have followed this reference example:
with the burden value of 42 Ohms since in my case, for 100A input primary CT will generate a secondary of 40mA.
I tried to run the code. But I'm returning with a random value when bulb is off, current is showing 2.02 and when I turned bulb on it shows 1.85.
Could any one please help me with what I'm doing here?
I've used the same code.
robertferanec , 09-09-2019, 11:24 AM
Did you try to connect oscilloscope the aurduino pin? What is the waveform like?
robertferanec , 09-10-2019, 12:52 PM
Hmm ... it may be quite difficult to debug the problem without a scope. You may need to see the waveforms on arduino pin.
How do you calculate the values what you show?
How do you calculate the values what you show?
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