Below is a photo of the nameplate of an Alstom Brand capacitor voltage (or potential) transformer (CVT). Voltage transformer is an instrument transformer that, together with a current transformer, is mainly used for electricity metering.
Unlike the traditional transformer, capacitor voltage transformer uses the principle of voltage division using a series of capacitors to step down the high AC voltage to a much lower voltage. As shown in the schematic diagram in the nameplate, a series capacitors C1 and C2 divided the voltage before the voltage is further reduce to a usable level using a typical multiple winding transformer.
Some useful contents of the nameplate includes the voltage ratio, secondary winding voltages, the output VA, voltage ratings, accuracy class, and the value of the capacitance C1 and C2.