I found this cheap current transformer on ebay and didn’t know what people thought about it.
If my math is right, and it puts out 0.080A at 200A input, and I don’t change the burden resistor on my emonPi pcb, the voltage will be 0.08 * 22 ohm = 1.76v. Is that too high for the emonPi? I’ve read that the input is normally 1.1v with the SCT-013-000 CT so should I change the burden resistor to >13.75 ohms (I can put a 39 ohm resistor in parallel with the 22 to get ~14 ohms, for ~1.125v? I could put a 36 ohm resistor in parallel to get 1.096v.
The datasheet from YHDC doesn’t show a diode to short the outputs on this CT, whereas the sct-013 does have one…
For reference, the reason I’m looking into this CT is because I have 4/0 gauge wires on my 200A panel (I’m in the US). and I’d like to measure whole-house. This CT has a 23mm (0.9") opening.