@RJR posted:Quite frankly, I can't figure out which combination of terminals are protected by the internal breaker.
A-B and C-U are not protected by the internal breaker.
@RJR posted:Rob, Manual says the breaker is 4 amps
Manual says the breaker is set to carry 4 amps continuously, but will hold a slight overload when the transformer is cool.
How to test it though is a different procedure. The manual gives an acceptable time - 9-35 seconds into .2 ohms using A-U.