Complex sentence: Electric discharges produced in the gas from the high voltage side of the piezoelectric transformer have properties found also in corona discharges, when it is operated far from electric grounds, and dielectric barrier discharges, when it is operated close to electric grounds separated by a dielectric.
Split into simpler sentences: Electric discharges produced in the gas from the high voltage side of the piezoelectric transformer have properties found also in the corona discharges and the dielectric barrier discharges. While the former mode occurs when the high voltage side of the piezoelectric transformer is operated far from the electric grounds, the latter mode occurs when it is operated close to electric grounds separated by a dielectric.