VT/CCVT questions

[z06dustin]

I'm studying VT/CCVTs... and I have a few questions?

When you design a CCVT, what design changes make the biggest impact on performance? Size of the caps (in Farads, not physical size)? What changes can be made to improve their performance? What do you lose/gain by making these changes?

And just making sure, the burden is opposite of a CT right? I.e. with a CT, big burden = bad, with a VT, small burden = bad.... right?

Thx for help!

 

[Flyer_PE]

^Big burden = bad for both. For a CT, big impedance = bad since your instruments/relays are in series and you are trying to limit the voltage on the instrument side. For a VT, big impedance = good because your instruments/relays will be in parallel on the secondary side and you want to minimize the voltage drop through the transformer.