Capacitor Voltage Transformer (Capacitor Voltage Transformer) is abbreviated as CVT.
The voltage transformer (power transformer) is abbreviated as PT.
Current transformer (current transformer) is abbreviated as CT.
CT: current transformer, PT, CVT: voltage transformer. Turn high current and high voltage into small current and low voltage for measurement, control and protection systems.
Both electromagnetic and capacitive voltage transformers convert high voltages into low voltages for measurement, control, and protection systems. In principle, it is a small (small capacity) transformer. However, it is better to call the device according to the canonical name. Especially in the power operation sector.
CT: current transformer, the primary is adjustable, ranging from 15, 30, 50, 75, 100A, and the secondary is standard 5A, which is converted by its transformation ratio.
If the reading of the watt-hour meter is 10 degrees, if the CT ratio used is 50/5, the actual electricity consumption is 100 degrees.
PT refers to the voltage transformer, the primary is generally 6000, 10000, 35000, 110000, 220000V, and the secondary is the standard voltage of 100V.
If it is high-voltage electricity metering, when CT is 100/5A and PT is 10000/100V, then the actual electricity consumption should be 1*20*100=2000 kWh for every 1 degree on the watt-hour meter.