33kv capacitor voltage transformer IEEE

33kV capacitor voltage transformer

It functions as the voltage meter in excess of 100 KV where the use of potential transformers would be economical. It also can be used in power systems to step down extra high voltage signals and provide alow voltage signal, for measurement or to operate a protective relay. In its most basic form the device consists of three parts: two capacitorsacross which the transmission line signal is split, an inductive element to tune the device to the line frequency, and a transformer to isolate and further step down the voltage for the instrumentation or protective relay. The device has at least four terminals: a terminal for connection to the high voltage signal, a ground terminal, and two secondary terminals which connect to the instrumentation or protective relay. Moreover,CVT is useful in communication systems. CVTs in combination with wave traps are used for filtering high frequency communication signals from power frequency. This forms a carrier communication network throughout the transmission network.

Outline drawing