I would like to reopen this question. I would like to modify the 6-34120 Direct Lock-On to trip at 80W. I am not worried about protecting the electronic circuits. I am worried about protecting the plastic trucks from the heat generated by a derailment. This was not a problem when all trucks were metal but with plastic I have had literal meltdowns by the time my ZW or KW circuit breaker trips. I am using a ZW or KW to power my TMCC so the transformer in use is always set to maximum voltage.
MJA