GTDS(O)F 10 | 20 | 30 Outdoor Bushing Type Current Transformer up to 10000 A, GTDS(O)F are used for large rated currents up to 10000 and above (on request) as a bushing-type with integrated current transformer. The current transformers are fully encapsulated in brown epoxy resin. Core and windings on the bushing tube are cast in one single operation. The primary conductor is guided through cover plates on request. The openings of the cover plates are adapted to the dimensions of the primary conductor. The selected design of the casting resin body ensures a largely homogeneous electrical surface load over the range of the flash over distance. This prevents glow phenomena between the primary conductor and the transformer.