Balanced Power

[mansr]

1 hour ago, Ralf11 said:

I wonder if balance power is better than a good isolation transformer?  It sure is a lot more $$, maybe due to the many used  isolation transformers available.

Huh? An isolation transformer output is by definition balanced.

[mansr]

There seems to be some confusion around what exactly the term balanced means. A transformer with a floating secondary is balanced in the sense that neither output terminal is fixed to ground (or any other) potential. A grounded centre tap is sometimes used as a safety measure. If the differential voltage is 120 V, both sides are limited to a harmless 60 V relative to ground. If, however, the goal is to isolate the load from external interference, a floating secondary is probably more effective.