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Capacitor Voltage Transformers (CVT)

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kaykay

In EHV Transmission applications, Capacitor Voltage Transformer (CVT) is generally used even in GIS. Why is normal Electro-magnetic type Potential Tranformer (PT) not used? Is there any specific reason other than cost and PLC compatability? Please give some guidelines.
 
P

Phil Corso, PE

Cost is not proportional to voltage. Instead its quite disproportionate!

Regards, Phil Corso
 
A

Amir

Hi there...

Of course there is another reason... VT is generally used for voltage levels up to the 63 kv, and for higher, you should apply CVT. It'll divide voltage levels between capacitors.

Take care...
 
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