Yes, that's an interesting topic in itself:- LIM
versus electrical safety tester (EST)! Put simply, doesn't the LIM essentially look at the
imbalance of currents drawn at L1 and L2 (as we can't really say line and neutral when talking about an isolated power system, can we)? It then regards the difference as leakage. But, maybe it's not current leakage within the equipment itself ... perhaps there's a parallel circuit somewhere!
And, of course, the EST measures the true leakage current(s) value(s) by interrupting the protective earth conductor (and all the rest).
It would be "educational" to get to the bottom of this one. My next question to ELIS would have to be:- how much supply current does this equipment draw (consume)? Is it something hefty?
