About CT-PT Combined Metering Sets

The CT-PT metering sets of this type as the name suggests are used for measurement of power on high voltage side. The CT-PT sets are installed before the main transformer & the main line goes through CT-PT set.

As the accuracy of the CT-PT set is high & as it is connected before the transformer, measurement of power is much more accurate compared to the metering one on LT side, the transformer losses are also included in the measurement.

They are oil cooled and outdoor, used on high voltage systems from 11-33kV. They consist of cores, windings, an MS tank with terminal box, and bushings.