I’d like to take advantage of the extra CT4 input on the emonTx. The load I want to measure is likely to always be less than 19A but I can’t 100% guarantee that will always be the case, as it’s currently protected with a 63A MCB.
I have a couple of questions:
If I connect up a YHDC SCT013 to the input and the current exceeds 19A on the primary, is there any risk of damage to the emonTx, or will I just get a maximum reading?
I found a very useful post CT4 as 100A which discusses adding a 27 Ohm resistor in parallel to change the input to 100A. I’d prefer not to alter the emonTX board, so could I add the resistor in parallel, external to the emonTx i.e. use an additional connector and wire it across the SCT013 output?
Many thanks for your help,