Originally Posted by FlyingCloud1937
You do realize that an isolation transformer only stops dc from flowing and that all AC can find it's way back to shore side ground through the ISO.
So it matters not which side the generator is connected, ...unless you also happen to run the generator while connected to the shore side pedistal.
Once disconnected, an ISO in series with the gen, is no different than an ISO in parallel with the gen.
I had to read this like 5 times to try and understand the meaning.
The first misunderstanding is how isolation transformers work! There is ZERO metallic connection between the primary and secondary. The connection is magnetic! There are no diodes or capacitors like you'll find in a galvanic isolator
, there is no 'leakage'. To extrapolate that ITs pass AC because they are a source for AC is simply wrong. They block both AC and DC.
The power on the secondary side is completely isolated from shore side power, it's a completely new source. One can hold one side of the secondary and also hold any of the shorepower connections (L1, L2, N, or G) and feel nothing, nada, zip! One can hold one side of the secondary and dance a jig on deck
in a rainstorm, nothing, nada, zip! Go swimming, nothing, nada, zip! Until you complete the connection back to the other side of the secondary, there will be no current
So I really don't understand basis for the claim "all AC can find it's way back to shore side ground through the ISO"