Ferroresonant transformers = Ancient method for Active Power Factor Correction

[Kiriakos GR]

Ferro-resonant transformers, this is an very Ancient technology mostly known in the USA.

Ferroresonant transformer, this wasting constantly power from the grid, in order this to offer Active Power Factor Correction.
(For actual circuitry details, please use web search.)

Ferroresonant transformer, this is today a relic of the past, it was a development this to assist at industrial applications.
Since the use of active electronics as a tool for Active Power Factor Correction, we gained much better results.

Over the decades, active electronics as a tool for Active Power Factor Correction, these have be improved over and over, and today we enjoy this technical benefit, with out us wasting that much and valuable electrical energy.

The American heavy industry, this replacing and upgrading it power systems frequently.
Eventually any old, and not worth using parts, they end-up to American scrap yards.

In conclusion, Ferroresonant transformers this is an interesting topic for learning purposes only, of past made electrical engineering design.