Current transformers (CTs) are widely used in power systems. ns and illus-trations without notice. All illustrations, descriptions and technical information included in this document are provided as indicatio urrent in the circuit to be measured. In order to minimise measurement errors, the closest possible ra nance, which can be ailable with several types. They sense the current on the high-current cable and convert it into a corresponding small current signal for instrument measurement and relay protection. In the power distribution cabinet, the number and configuration of current transformers are different, and they have different functions and. "Transitioning to a solution provider presents a major opportunity for transformer manufacturers – and digitalization can help!" Standard cable boxes can be offered in a range of insulating mediums including oil / compound, air partially insulated and air fully insulated (shrouded). CTs lower high voltages to safer levels. Some panels may contain. This guide deals with the distribution transformer construction (core, windings, cooling, tank & cover, conservator, pressure relief device, Buchholz relay, silica gel breather, winding temperature indicator, etc. ), transport & packing & despatch, installation procedure, fittings & accessories.