Oil Cooled Potential Transformer An oil-cooled potential transformer, also sometimes abbreviated as OCAPT, is a specific type of transformer used in electrical systems for measurement and protection purposes.Steps down high voltage to safer, measurable values for instruments like meters and relays. Isolates measuring instruments from the high voltage side of the system for safety. Provides a voltage signal for protective relays to isolate faulty equipment if needed. #Oil-Cooled-Potential-Transformer-Manufacturer-In-Vadodara #Oil-Cooled-Potential-Transformer-Manufacturer-In-Gujarat #Oil-Cooled-Potential-Transformer-Manufacturer-In-India