Profile: Sonal Transformer Tathawade is a manufacturer of variety of transformers, AC & DC chokes and reactors. Single phase isolation transformer eliminates the power line noise, surges, spikes and transients. It also provides high insulation resistance and provides complete electromagnetic & electrostatic shielding. Edge winding coils are made by edge winding of the strips with multi-turns which are cut as per design to gain required resistance values. The coils are inserted on porcelain grooves, which are in turn supported by a metal plate. These types of elements are fitted on metal trays of the resistor box.