This Architectural Drawing is AutoCAD 2 D drawing of Box of measuring and current Transformers by Polycarbonatto Type. Polycarbonater are a group of thermoplastic polymers containing carbonate groups in their chemical structure. The instrument transformers isolate measurement or protection circuits from the high voltage of the primary system. A current transformer provides a secondary current that is accurately proportional to the current flowing in its primary. The current transformer presents a negligible load to the primary circuit. For more details and information download the drawing file.