PARTS OF CURRENT TRANSFORMERS (CT) USED IN GAS INSULATED SUBSTATION (GIS)
What Are The Parts Of Current Transformers (CT) Used In GIS?
CTs are inductive ring types installed either inside the GIS enclosure or outside the GIS enclosure. The GIS conductor is the single turn primary for the CT.
CTs inside the enclosure must be shielded from the electric field produced by the high voltage conductor or high transient voltages can appear on the secondary through capacitive coupling.
For CTs outside the enclosure, the enclosure itself must be provided with an insulating joint, and enclosure currents shunted around the CT.
Both types of construction are in wide use.
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