About Current Transformers

Accurate voltage will not be you got from CT that you give resistor,

because your CT is in series with Load. and then between Source (220V or 380V or 11kV or 20kV) to Load you give CT.then you put resistor in there. so your voltage is change following the change of your load.

better you use VT in paralel with your source to get stable voltage.

thanks & warm regard

As far as I'm aware you should get a linier voltage range. I've used this method for under load detection for belt driven fan drives.

Your load resistor probably has too high a resistance. Try it with a load resistor of much less than 1 ohm.

OR put your mutimeter on 10 or 20 amp AC and connect directly to the current transformer output. CAUTION: Verify that you multimeter is working correctly before doing this. If the multimeter has an open fuse or is not working correctly, you may destroy both the multimeter and the current transformer.

Are you exceeding the burden rating of your CT or driving the CT outside its linear operating zones?

Are you wanting a fixed voltage but it is changing as your current changes?

What are you using the voltage for?

Can you please supply more information regarding your application.

I assume that you are measuring the CT Secondary Voltage with a Voltmeter. If so, voltmeters have a very high Ohmic burden. If this burden is more than the CT Rated Burden, then definitely the CT accuracy will be affected.