I'm looking to use a (surplus, NOS) Sola (catalog number 22212) ferroresonant voltage regulating transformer (120V primary and secondary) as a low-power isolation transformer (4A) in case I need to float some project. Will this work? What safety issues would I run into vs. using a designed-for-purpose isolation transformer?
Electronic – Using a ferroresonant regulating transformer as an isolation transformer
isolationsafetytransformer
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Best Answer
It will work, and there shouldn't be any safety issues.
Just be aware:
These characteristics occur because the core is deliberately driven into saturation by the resonant winding in order to get the voltage-regulating effect.