Has the YHDC SCT-013-000 Current Transformer (or any other CT) been tested during a bolted fault on the circuit it is monitoring? Specifically, during a bolted fault (meaning the hot and neutral are directly connected in a short circuit - this is the worst-case, highest current fault), what is the resulting maximum voltage that will be seen at the input to the ADC, and what is the risk of blowing the ADC/PI/Arduino under this condition?
Suppose I’m monitoring a 20A circuit and I have my burden resistor set to give me 4.5 V peak-to-peak at 20A. Rule-of-thumb, during a fault the breaker will trip at 15x breaker rating, or 300A, or a peak-to-peak as seen at the ADC of more than 60 volts.
I presume the CT will saturate and the actual maximum voltage will never reach this high level, but how high can it get? How much voltage can the ADC take before it is destroyed? Is there an effective surge protection that can be used, perhaps a series cap or inductor to ground?