The role of capacitance in capacitive voltage transformers 1

The capacitive voltage transformer (CVT) is a commonly used measurement device in power systems, primarily designed to measure voltage in high-voltage systems and step down the high-voltage signal to a safe level. In CVTs, capacitors play a critical role.diode

A capacitor is a device for storing electric charge, and its functions can be broadly categorized into the following aspects:

Voltage reduction: In a CVT, the capacitor reduces the voltage from a high-voltage system to an acceptable range for measurement, transmission, and control systems, typically 100V or 110V, through voltage division. This facilitates the normal operation of subsequent equipment in the system while ensuring the safety of operators and devices.diode

2. High-frequency filtering: The capacitor possesses DS485TM frequency characteristics, enabling the CVT to output the required voltage more accurately under industrial frequency (50Hz or 60Hz) and high-frequency interference conditions, thereby reducing system errors.  diode